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US Navy Breaks Laser Record

ectotherm writes "The US Navy has broken the existing record for the power of a laser. Their new free-electron laser can burn through 20 feet of steel per second. 'Next up for the tech: additional weaponization. The Navy just awarded Boeing a contract worth up to $163 million to take that technology and package it as a 100 kW weapons system, one that the Navy hopes to use not only to destroy things but for on-ship communications, tracking and detection, too — using a fraction of the energy such applications use now, plus with more accuracy.' Now all we need to do is upgrade the sharks..."

213 of 294 comments (clear)

  1. Re:ouch by AGMW · · Score: 3, Insightful

    ... we really just need a small group to protect the environment and or a army that create Harmony between nations.

    Sure, I'll vote for that as long as it's my army!

    --
    Eclectic beats from Leeds, UK
    handmadehands.co.uk
  2. They want 2000 though by Woogiemonger · · Score: 4, Informative

    Who needs to burn through 20 feet of steel? Or even 2 feet of steel?

    What's even more crazy is that their ultimate goal is to reach a megawatt of power and burn through *2000* feet of steel per second. I'd imagine seeing a phalanx of tanks, and with one 3 second FWOOOONG! from the laser, our military crosscuts through them all in one sweep. Here's the Wired article I'm referring to: http://www.wired.com/dangerroom/2011/02/unexpectedly-navys-superlaser-blasts-away-a-record

    1. Re:They want 2000 though by SpinyNorman · · Score: 3, Informative

      The "20 feet of steel per second" number is similar to Slashdots car analogies - a way to make an otherwise difficult to understand number more human friendly. It's probably just the time it took to burn though, say, 1/4" of steel scaled up how much it could cut through in a second, if they could operate it continuously (which presumably they can't).

      The goal of this thing certainly isn't cutting though many feet of steel - it's for shooting down missiles.

    2. Re:They want 2000 though by commodore6502 · · Score: 1

      >>>Who needs to burn through 20 feet of steel?

      The Navy is they are trying to "laser" a hole in an enemy ship and make it sink. Certainly more efficient than the old method of using a torpedo or missile.

      --
      Information wants to be expensive AND wants to be free. So you have Value vs. Cheap distribution fighting each other.
    3. Re:They want 2000 though by bsDaemon · · Score: 4, Informative

      I interned in the instrumentation and control group of the Jefferson Lab FEL the summer I graduated from high school. My main project was working with the optics guys to write some spot-size detection software in C. Until my current job, it was definitely the most fun I've ever had in my life that didn't involve rafting. Of course, back in 2002, they had just started the 10kW upgarde project from 1kW, so a little over 10 years to get it working at 10x that capacity is pretty sweet.

      the project website for all the real, nerdy, details is here if anyone is interested.

    4. Re:They want 2000 though by Woogiemonger · · Score: 2

      The "20 feet of steel per second" number is similar to Slashdots car analogies - a way to make an otherwise difficult to understand number more human friendly. It's probably just the time it took to burn though, say, 1/4" of steel scaled up how much it could cut through in a second, if they could operate it continuously (which presumably they can't).

      The goal of this thing certainly isn't cutting though many feet of steel - it's for shooting down missiles.

      With 20 ft per second I can maybe agree (that translates to a quarter an inch of steel per millisecond on a stationary target), but when they hit 2000, it's quacking like the duck that it is.

    5. Re:They want 2000 though by Zorpheus · · Score: 2

      That is not so useful to fire on one ship from another since you cannot shoot over the horizon. Missiles can sink your ship before you get in range. Unless you get down all of them with the laser, of course.

    6. Re:They want 2000 though by Thing+1 · · Score: 1

      That is not so useful to fire on one ship from another since you cannot shoot over the horizon. Missiles can sink your ship before you get in range. Unless you get down all of them with the laser, of course.

      BIG MIRRORS IN ORBIT.

      --
      I feel fantastic, and I'm still alive.
    7. Re:They want 2000 though by TCPhotography · · Score: 2

      Right now the USN doesn't use any OTH missiles for ship-to-ship duties. We keep the Harpoon (XGM-84) around because it's cheap and with some minor mods (a GPS unit) can be used as a land attack missile.

      The preferred anti-ship system right now is an SM-2 because with them you maintain positive control throughout the entire flight. It's also a hell of a lot faster than a subsonic Harpoon, which combined with the solid fuel makes it a lot more dangerous.

    8. Re:They want 2000 though by commodore6502 · · Score: 1

      You forgot about the TASM (Tomahawk Anti-Ship Missile).

      As for lasers I could easily imagine a missile equipped with a laser so, instead of blowing a hole with explosives, the missile would "pop up" 20 miles out and start melting through the hull.

      --
      Information wants to be expensive AND wants to be free. So you have Value vs. Cheap distribution fighting each other.
    9. Re:They want 2000 though by TCPhotography · · Score: 1

      The TASMs were pulled from service years ago.

  3. 20 feeet, not 200 by SpinyNorman · · Score: 4, Informative

    The article said it can burn thru 20 feet of steel per second, not 200 per the slashdot version.

    Even the 20 feet is likely misleading since I doubt it can sustain that power output for more than a fraction of a second, and anyways if you really were borign thru multiple feet of steel then all your vaporized steel in the borehole you were creating would get in the way of the laser.

    Still very impressive though. I'd love to see the face of the first crackpot dictator whose ICBMs are shot down by one of these.

    1. Re:20 feeet, not 200 by Anonymous Coward · · Score: 1

      Summaries are intentionally misleading and made that way by the editors. It encourages people to "participate" in a discussion and is for keeping mindshare with people people who are somehow not discouraged by repeated editorial manipulation.

      Single fox news link posted to the front page? Seriously could have gotten a better source.

    2. Re:20 feeet, not 200 by YrWrstNtmr · · Score: 3, Informative

      I'd love to see the face of the first crackpot dictator whose ICBMs are shot down by one of these.

      Currently, no dictator at the crackpot level has an ICBM. Emphasis on the C.

    3. Re:20 feeet, not 200 by Yvanhoe · · Score: 4, Informative

      This is very interesting and I think the point is not to shoot down ICBMs but to shoot down anti-ship missiles. Right now, there are simply no way to stop a recent missile before it gets to the ship. Aircraft carriers are currently little more than overpriced targets. This kind of research is vital to the navy.

      --
      The Wise adapts himself to the world. The Fool adapts the world to himself. Therefore, all progress depends on the Fool.
    4. Re:20 feeet, not 200 by burnin1965 · · Score: 1

      If the United States military exercised their full capability everyone on the planet would be dead multiple times over and a significant percentage of all human civilization infrastructure would be destroyed.

    5. Re:20 feeet, not 200 by ISoldat53 · · Score: 1

      I wonder if this announcement has anything to do with the recent Chinese parade showing off their new anti-aircraft carrier missile?

    6. Re:20 feeet, not 200 by SpinyNorman · · Score: 2

      There do already exist anti-missile defences such as the phalanx gun (a radar guided gun that shoots 3-4000 15mm rounds per minute = 50+ rounds/sec), but this would certainly be a huge step up in defensive capability.

      http://www.google.com/search?hl=en&tbs=vid%3A1&q=phalanx+gun&aq=f&aqi=&aql=&oq=

    7. Re:20 feeet, not 200 by SpinyNorman · · Score: 1

      This video shows the phalanx doing it's thing ! :-)

      http://www.youtube.com/watch?v=prNhzbqlZ4Q

    8. Re:20 feeet, not 200 by camperdave · · Score: 2

      Summaries are intentionally misleading and made that way by the editors. It encourages people to "participate" in a discussion and is for keeping mindshare with people people who are somehow not discouraged by repeated editorial manipulation.

      That explains a lot.

      Single fox news link posted to the front page? Seriously could have gotten a better source.

      I'll say. That's why there are such gems as producing a supercharged electron beam that can burn through 20 feet of steel per second. A free electron laser uses a beam of electrons as a lasing medium, but it never leaves the device.

      “We’re fast approaching the limits of our ability to hit maneuvering pieces of metal in the sky with other piece of flying metal,” explained Rear Admiral Nevin P. Carr Jr., Chief of Naval Research, in an interview with FoxNews.com. That’s why he calls free election laser technology or “directed energy” tech “our marquee program.”

      Free election laser? I thought they were shooting down cruise missiles, not malevolent dictators.

      --
      When our name is on the back of your car, we're behind you all the way!
    9. Re:20 feeet, not 200 by ScrewMaster · · Score: 1

      I wonder if this announcement has anything to do with the recent Chinese parade showing off their new anti-aircraft carrier missile?

      I dunno. On the one hand, it gains some political points but on the other ... it's the kind of think you'd probably want to keep secret so the other side doesn't spend time and money working on countermeasures.

      --
      The higher the technology, the sharper that two-edged sword.
    10. Re:20 feeet, not 200 by Anonymous Coward · · Score: 1

      Currently, no dictator at the crackpot level has an ICBM. Emphasis on the C.

      Emphsis on the C because there may be a crackpot dictator within IBM?

    11. Re:20 feeet, not 200 by JaredOfEuropa · · Score: 1

      That's a Dutch ship, using the Goalkeeper antimissile system rather than the Phalanx.

      --
      If construction was anything like programming, an incorrectly fitted lock would bring down the entire building...
    12. Re:20 feeet, not 200 by Anonymous Coward · · Score: 1

      I love how everyone with a tiny bit of knowledge clings to the idea of that one missile that made it into Fox News and CNN as the end all be all anti-cap ship weapon. Anyone with the inkling to do some research will find the problem is far more significant but far less worrisome than the mainstream media would have us believe. I wrote a freakin' GRADUATE THESIS on the subject.

    13. Re:20 feeet, not 200 by Brannoncyll · · Score: 1

      Well then lets pray to all of our deities that the next president isn't Republican.

    14. Re:20 feeet, not 200 by John+Hasler · · Score: 1

      Or maybe you do want the other side to spend time and money working on countermeasures (besides, the other side is going to know about it anyway).

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    15. Re:20 feeet, not 200 by Anonymous Coward · · Score: 1

      You probably believe also that he can deploy them against the UK within 45 minutes, don't you? Get real, wanker.

    16. Re:20 feeet, not 200 by fluffy99 · · Score: 1

      The article said it can burn thru 20 feet of steel per second, not 200 per the slashdot version.

      Even the 20 feet is likely misleading since I doubt it can sustain that power output for more than a fraction of a second, and anyways if you really were borign thru multiple feet of steel then all your vaporized steel in the borehole you were creating would get in the way of the laser.

      Still very impressive though. I'd love to see the face of the first crackpot dictator whose ICBMs are shot down by one of these.

      True. The duty cycle is probably very short indeed. However a single 1-millisecond shot is sufficent to burn through a 1/4" shell on an inbound missle. Higher power in a short duration is actually what you want when shooting something down as it makes stable aiming (especially on something rotating) far less critical. The Navy is very interesting in laser weapons as nuclear power is cheap and you don't have to carry or create a supply line for munitions.

    17. Re:20 feeet, not 200 by aliquis · · Score: 1

      How great.

    18. Re:20 feeet, not 200 by Marcika · · Score: 1

      ...Right now, there are simply no way to stop a recent missile before it gets to the ship. Aircraft carriers are currently little more than overpriced targets. This kind of research is vital to the navy.

      This is when I wish I made an account ten years ago so I could be seen...

      Of course there is anti-ship missile defense systems. They are shockingly impressive. They are able to take out any other country's missile technology, but unlikely our own under certain circumstances. A carrier is never alone, there are dedicated defense vessels using 'ordinary' missile technology and the carrier's point defense is merely the last line of defense should things go pear shaped.

      As a rule the military tries to stay 20 years ahead of everyone and this is simply that.

      Citation http://en.wikipedia.org/wiki/Phalanx_weapon_system

      Let me be the first to say BULLSHIT. I never heard of any expert stating that a teeny-tiny 20mm gatling gun like the Phalanx would have a snowman's chance in hell of intercepting a ballistic missile. Just to remind you, a modern ASBM like the Dong-Wave 21 has a 15-tonne warhead arriving at mach 10 or more. Firing a handful of 100g gatling gun rounds at it in that last one second when it is in range won't do a damn thing - it won't even change its direction...

      The only credible countermeasure against ballistic missiles is to shoot another ballistic missile at it - preferably AEGIS-guided, like the RIM-161 SM-3... Problem is that there are a limited number of these on any one target ship, each with only one shot at success; and even 20 ASBM are a hell of a lot cheaper than a carrier with all its planes...

    19. Re:20 feeet, not 200 by Yvanhoe · · Score: 1

      Well, feel free to link on your thesis. The fact that there are missiles that can escape detection until very close range and switch into ballistic mode before even bullets can reach them seems like good things to be worried about.

      Even before reading about it I personally was more worried about the possibility to overwhelm a ship's anti-missile defenses with thousands of missiles/decoys at the same time. If you can sink a ship with a missile budget that is 1/10th of the ship's cost, the ships becomes actually a standing target.

      So please tell us what possible ways of escaping a ballistic missile have US navy ships ?

      --
      The Wise adapts himself to the world. The Fool adapts the world to himself. Therefore, all progress depends on the Fool.
    20. Re:20 feeet, not 200 by Yvanhoe · · Score: 1

      I may add that while Phalanx turrets have had some success at intercepting some anti-ship missiles, the worries comes exactly from the kind of missiles described : a ballistic missile. As a reminder, "ballistic" means that the missile is just falling down. You can destroy its guidance systems, engines, etc... without changing its trajectory. It is basically several tons of metal and explosives falling down on the ship.

      Recent missiles have the ability to escape detection until close range (by staying close to the sea) and make a very quick manoeuver (turn 90 degrees up in a very tight turn) so as to go ballistic just a few seconds after the anti-missile system has had a chace to detect it. This is your interception window, bullets and missiles are too slow to be effective in these conditions, laser is your only chance. You have to destroy guidance systems during the stealth-to-ballistic manoeuver.

      --
      The Wise adapts himself to the world. The Fool adapts the world to himself. Therefore, all progress depends on the Fool.
  4. volume by electrosoccertux · · Score: 2

    what diameter is the beam? volume/sec more important IMO

    1. Re:volume by pushing-robot · · Score: 2

      what diameter is the beam? volume/sec more important IMO

      I dunno, if it slices a jet/tank/ICBM/ship in half I'm probably not going to care too much about the size of the gap.

      --
      How can I believe you when you tell me what I don't want to hear?
    2. Re:volume by SpinyNorman · · Score: 1

      I doubt there are too many places an ICBM travelling at Mach 1 can sustain even a 1/2" hole bored thru it without either somthing vital (fuel, wiring, electronics, warhead) being hit, or just simply losing control aerodynamically and breaking up a la Columbia (Space Shuttle) with a hole in the wing.

    3. Re:volume by Dr.+Grabow · · Score: 5, Informative

      Mach 1 is about 340 m/s. At that speed the Navy could send up a fighter and throw a rope around it. ICBM reentry speeds are usually over 4,000 m/s, with in-flight speeds of over 6,000 m/s. Or about Mach 16. A different magnitude of problem...

  5. An order of magnitude by Anonymous Coward · · Score: 1

    Hey Editors, were you asleep the day they taught reading comprehension? The FA says 20 feet per second, not 200. An order of magnitude is one hell of an error. You guys are pathetic. How about you slow down and practice a little quality control?

  6. 20, not 200 by Broofa · · Score: 1

    From the article: producing a supercharged electron beam that can burn through 20 feet of steel per second"

    Read more: http://www.foxnews.com/scitech/2011/02/18/navy-breaks-world-record-futuristic-laser-getting-real/#ixzz1EPpwfpx0

    1. Re:20, not 200 by Stele · · Score: 1

      Fox News has a science tech section? You just blew my mind!

    2. Re:20, not 200 by Posting=!Working · · Score: 1, Funny

      Yes, it covers both major branches of science: war and religion.

      --
      This sentence no verb.
  7. Not lasing yet by Anonymous Coward · · Score: 4, Informative

    This 500kV test was of just the accelerator (i.e. the bit the produces the electron beam part of a Free Electron Beam laser), not the FEL itself. It's this electron beam that is purported to do the extraordinary steel-cutting, not the laser beam. There is no mention of whether this was a momentary or sustained electron beam output. A 500kV accelerator on it's own isn't all that impressive, but once they package it into a small volume (room rather than building), and actually use it to lase, then that will be very impressive indeed.

    1. Re:Not lasing yet by Dr.+Evil · · Score: 1

      These jokes were old when Slashdot UIDs were in the 4 digits.

    2. Re:Not lasing yet by John+Hasler · · Score: 1

      > A 500kV accelerator on it's own isn't all that impressive,

      A 500kV accelerator with a beam current of 1 microamp isn't all that impressive. A 500kV accelerator with a beam current of 1A is.

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
  8. Re:20 feet of steel, not 200. by maroberts · · Score: 3, Informative

    Who needs to burn through 20 feet of steel? Or even 2 feet of steel?

    Well, not so much 20 feet of steel directly, but there's a lot to be said for a weapon that could punch through 1-2 feet of layered tank armour, or melt a substantial hole in a warship. While many warships are not heavily armored nowadays, there are still exceptions.

    --

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  9. Re:US Navy Breaks Laser Record by maroberts · · Score: 1

    Fricken' sharks not impressed.

    Fricken' sharks are checking in for an upgrade...

    --

    Donte Alistair Anderson Roberts - hi son!
    Karma: Chameleon

  10. Damn it by Semptimilius · · Score: 1

    Just when I installed my new 200' thick steel bunker doors on my ocean-side villain headquarters.

    1. Re:Damn it by camperdave · · Score: 1

      That's okay. Just mount mirrors on the outside of the bunker doors. If you get the angle just right, the navy will wind up shooting themselves.

      --
      When our name is on the back of your car, we're behind you all the way!
    2. Re:Damn it by ravenshrike · · Score: 1

      Not unless you have one fuckload of an impressive heatsink on the other side of the mirrors cold to a few degrees above 0

  11. Serious range disadvantage for naval warfare. by seeker_1us · · Score: 2

    Naval artillery and missiles can shoot over the horizon. Lasers have to be in line of sight.

    1. Re:Serious range disadvantage for naval warfare. by SpinyNorman · · Score: 4, Insightful

      Who needs range when your "missile" is travelling at the speed of light?

      Anyways, for a laser mounted on a Navy warship, say 10m above sea level, the horizon is over 10km away, so even an incoming sea skipping exocet missile coming in at 300 m/s is over 30 sec away.

      http://en.wikipedia.org/wiki/Horizon

    2. Re:Serious range disadvantage for naval warfare. by rossdee · · Score: 2

      But naval warfare is well suited to the sharks that you mount your lasers on

    3. Re:Serious range disadvantage for naval warfare. by GreatBunzinni · · Score: 4, Insightful

      These laser systems are being developed to shoot down incoming artillery and missiles. That's why the US Navy is commissioning companies to develop small enough systems to be fit in destroyers. That way, the US carrier group employs these destroyers to protect the carrier group from airborne threats while the carrier, with their fighters and bombers, occupy themselves with attacking stuff over the horizon.

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    4. Re:Serious range disadvantage for naval warfare. by peragrin · · Score: 1

      good you have the basics, now go back and learn which horizon your shooting over and how one shoots over the horizon to begin with.

      There is plenty of time for a laser to hit naval artillery and missiles while they are flying over the horizon and the target they are attacking

      --
      i thought once I was found, but it was only a dream.
    5. Re:Serious range disadvantage for naval warfare. by TheRaven64 · · Score: 1

      What makes you think that they're just for attacking? One of the nice things about lasers is that they can be aimed very quickly. With enough energy, you can vaporise incoming artillery shells. And if you can vaporise any incoming cruise or ballistic weapons, you can get very close to the enemy...

      --
      I am TheRaven on Soylent News
    6. Re:Serious range disadvantage for naval warfare. by timeOday · · Score: 1
      Then again, defensive lasers could shoot down incoming enemy artillery and missiles.

      Also, notice the sentence "the Navy just awarded Boeing a contract worth up to $163 million to take that technology and package it as a 100 kW weapons system."

    7. Re:Serious range disadvantage for naval warfare. by maxume · · Score: 1

      Of course, such a device would still be quite useful at shooting down such missiles.

      --
      Nerd rage is the funniest rage.
    8. Re:Serious range disadvantage for naval warfare. by Nemyst · · Score: 1

      Lasers are unavoidable and impossible to counter - the best you can do is get more hull plating everywhere. They just about never miss, either, especially on large targets.

    9. Re:Serious range disadvantage for naval warfare. by Graff · · Score: 1

      Naval artillery and missiles can shoot over the horizon. Lasers have to be in line of sight.

      True, which is why you make them orbital lasers.

      Even better is if you make them orbital mind-control lasers!

    10. Re:Serious range disadvantage for naval warfare. by SpinyNorman · · Score: 1

      Lasers are unavoidable and impossible to counter - the best you can do is get more hull plating everywhere.

      Yeah - either that or just shoot the frickin' shark.

    11. Re:Serious range disadvantage for naval warfare. by jpapon · · Score: 1

      I may be off base here, but I'm pretty sure building a mirror that reflects an energy beam that can burn through 20ft of steel per second is impossible. Or rather, impossible with today's technology. Or do you think a mirror-coated ICBM would be invulnerable to said laser? Think a little!

      --
      -- Let us endeavor so to live that when we pass even the undertaker shall be sorry. -- M. Twain
    12. Re:Serious range disadvantage for naval warfare. by fish+waffle · · Score: 5, Insightful

      ...impossible to counter?

      Umm, what if the enemy launched 1000 fake missiles at the same time---how many simultaneous targets can it destroy? What if they launched a series of missiles from beyond the horizon, how long can you keep using your laser? What if they launched torpedos instead, or at the same time, does your laser also work underwater? What if they launched highly reflective chaff with their missiles, would your laser be able to find the target and would it have full energy? What if they launched a whole lot of small missiles rather than one big one? What if their missiles incorporated radar invisibility, so you don't see it with the auto-aiming mechanism? What if they just launched chunks of metal that didn't care if they had a pin-sized hole in them? What if they made missiles that looked like missiles, but actually had the explosive part offset somehow, so your super-accurate laser kept burning holes in irrelevant areas?

    13. Re:Serious range disadvantage for naval warfare. by burnin1965 · · Score: 1

      Would that be the exocet missile with the fresh coat of Krylon metallic chrome paint on the nose cone? :P

    14. Re:Serious range disadvantage for naval warfare. by burnin1965 · · Score: 1

      Lasers are unavoidable and impossible to counter

      I checked and the local Ace Hardware is mysteriously out of Krylon metallic chrome spray paint.

    15. Re:Serious range disadvantage for naval warfare. by Carewolf · · Score: 1

      So you have an incoming ballistic projectile coming at you and you shoot it with you laser.. You now have a molten superheated projectile of the exact same mass and velocity coming at you.. It is very convinient to be able to detonate warheads before impact, but the enemy will stil have old-fashioned mass-based weapons to shoot you with.

    16. Re:Serious range disadvantage for naval warfare. by PPH · · Score: 1

      True, which is why you make them orbital lasers

      Now that's a shark out of water if ever there was one.

      --
      Have gnu, will travel.
    17. Re:Serious range disadvantage for naval warfare. by TheRaven64 · · Score: 2

      No, you have a superheated cloud of vapour coming at you with the same momentum. The interactions between air and a solid projectile and air and a cloud of vapour are very different.

      --
      I am TheRaven on Soylent News
    18. Re:Serious range disadvantage for naval warfare. by PieSquared · · Score: 1

      And what percent of incoming light do you think chrome paint reflects? 99%? Why, that only leaves 2.5 inches of steel per second of cutting power, and what it actually needs is enough heat to burn paint, which is considerably less.

      --
      Does a line appended to your comment give your post meaning in and of itself, or only in relation to those without?
    19. Re:Serious range disadvantage for naval warfare. by Thing+1 · · Score: 1

      I like the AC's response for humor, but I can envision us putting up a bunch of orbital mirrors. 'Course, why not put the weapon in orbit as well? Cuts down on half the travel time, and also can be more accurately pointed.

      --
      I feel fantastic, and I'm still alive.
    20. Re:Serious range disadvantage for naval warfare. by Thing+1 · · Score: 1

      One of the nice things about lasers is that they can be aimed very quickly. With enough energy, you can vaporise incoming artillery shells

      I feel bad for the birds of prey, who will suddenly become the military's dinner.

      --
      I feel fantastic, and I'm still alive.
    21. Re:Serious range disadvantage for naval warfare. by phobos512 · · Score: 1

      I'm going to go ahead and give you the benefit of the doubt and assume you meant sea SKIMMING, not sea SKIPPING. The idea of a weapon bouncing along the surface of the ocean at 0.92 Mach is...well, hilarious. To say nothing of the fact that the Exocet doesn't go that fast.

    22. Re:Serious range disadvantage for naval warfare. by phobos512 · · Score: 1

      We've been frying pigeons since the inception of radar. Nothing new to be concerned about.

    23. Re:Serious range disadvantage for naval warfare. by phobos512 · · Score: 1

      "Torpedoes present a tougher problem, and would probably be the most effective weapon against a laser-armed ship, since making a laser that can counter a torpedo is hard. Of course, torpedoes themselves have issues - basically it boils down to: fast, long range, cheap, smart - pick at most three, and "cheap" counts as two." And why do yo make this supposition? There are wavelengths of light that easily penetrate to the depths torpedoes travel at, which isn't very deep, especially in the terminal phase. It's again just a question of energy on target.

    24. Re:Serious range disadvantage for naval warfare. by phobos512 · · Score: 1

      "Of course, torpedoes themselves have issues - basically it boils down to: fast, long range, cheap, smart - pick at most three, and "cheap" counts as two." The generally acknowledged "pick any" in engineering is "Cost, Schedule, Performance" within which you pick any two to be as originally desired. Choose three of four though, that's, charming, lol.

    25. Re:Serious range disadvantage for naval warfare. by kevinNCSU · · Score: 1

      Once you detonate the warhead there isn't going to be a whole lot of solid mass left traveling in the original direction.

    26. Re:Serious range disadvantage for naval warfare. by Zancarius · · Score: 1

      The generally acknowledged "pick any" in engineering is "Cost, Schedule, Performance" within which you pick any two to be as originally desired. Choose three of four though, that's, charming, lol.

      I suspect the OP knew that much, but he was simply being humorous or attempting to add tongue in cheek humor to the conversation.

      You also neglected the "fast, good, and cheap" from business, too, which is effectively the same thing but with smaller words so that bean counters can more easily understand.

      --
      He who has no .plan has small finger. ~ Confucius on UNIX
    27. Re:Serious range disadvantage for naval warfare. by tkrotchko · · Score: 1

      "Umm, what if the enemy launched 1000 fake missiles at the same time--"

      Who can do such a thing?

      As far as a missile is concerned, what is the difference between a "real" missile and a "fake" one? Is it the warhead?

      Because it seems to me that once you can build a missile, you might as well put a warhead on them because that might be the cheapest part of the weapon.

      So then we're back to "who has 1000 missiles to launch"? Does anybody have that capability?

      As to the other scenarios you mention, who has those capabilities? Not theoretically, but actually has them?

      --
      You were mistaken. Which is odd, since memory shouldn't be a problem for you
    28. Re:Serious range disadvantage for naval warfare. by John+Hasler · · Score: 4, Informative

      Mirrors don't work against extremely high power lasers. The electric field strength at the focal point is such that electrons are ripped directly out of the atoms. This forms a plasma which is an efficient absorber regardless of how shiny the surface originally was.

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    29. Re:Serious range disadvantage for naval warfare. by John+Hasler · · Score: 1

      You have to admit that a sea-skipping missile would be hard to hit, though. Of course, it might also be a bit inaccurate...

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    30. Re:Serious range disadvantage for naval warfare. by The+Wild+Norseman · · Score: 1

      No! they'll just burn a hole thru the horizon and get you on the other side :)

      Chuck Norris doesn't burn a hole through the horizon.

      He is the horizon.

      --
      "A government is a body of people usually -- notably -- ungoverned." -Shepherd Book
    31. Re:Serious range disadvantage for naval warfare. by jklovanc · · Score: 1

      The Chinese have 187 Xian H-g's each capable of launching 6-7 anti ship missiles. 187*7 = 1309. So China does have the capability of launching 100+ antiship missiles at once. Add in missiles launched from ships, submarines and ballistic missiles and one can easily see have any defence can be overwhelmed. I am not saying it will be easy; just possible.

    32. Re:Serious range disadvantage for naval warfare. by blair1q · · Score: 1

      Line of sight on the ocean is a long damn way, and lasers are zero time-of-flight. Gives you plenty of room to defend against any projectile known.

    33. Re:Serious range disadvantage for naval warfare. by stevelinton · · Score: 1

      1. pure ballistic weapons aren't that big a threat. They are in flight, and unsteered for so long that you can dodge them (or shoot them down with some sort of quick reacting machine gun).

      2. If you melt the front or side of the shell it will likely tumble and miss, and surely fail to penetrate armour

      3. You may be able to detonate and will certainly be able to disable the explosive warhead. Now you just have a cannonball coming at you, which is a lot better than a shell.

    34. Re:Serious range disadvantage for naval warfare. by John+Hasler · · Score: 1

      And while they are concentrating all their antiship resources on one US carrier, what are the other US carriers doing?

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    35. Re:Serious range disadvantage for naval warfare. by GravityStar · · Score: 1

      I think the idea would be that the energy beam arrives at the mirror evenly distributed over its surface. The mirror would then do the focusing and targeting. As for execution, I don't know if this is feasible, but it made for a great Tom Clancy novel though. (The Cardinal of the Kremlin)

      http://www.amazon.com/Cardinal-Kremlin-Tom-Clancy/dp/0425116840

    36. Re:Serious range disadvantage for naval warfare. by burnin1965 · · Score: 2

      I was being facetious about the chrome painted missile but you are wrong about mirrors and high power lasers.

      It is not as simple as spraying krylon chrome paint on a substrate to create a laser mirror and cooling is an issue but even high power lasers utilize mirrors in the optical cavity with a Q switch outcoupler mirror on one end.

      For your reference here is a picture of the outcoupler from the Jefferson Lab FEL being worked on.

    37. Re:Serious range disadvantage for naval warfare. by garyebickford · · Score: 1

      There are several operational tactical missiles that fly at supersonic speeds. The Brahmos I cruise missile is operational now. Brahmos II (2015 deployment) will be hypersonic - Mach 5-7. So now it's less than six or five seconds assuming you spot it at the horizon.

      But IIRC the radar on an aircraft carrier is at least 170 feet above ground, so the horizon is farther. However over-the-horizon radar helps - If I recall Top Gun they could spot planes out 200 miles (but those are higher off the deck - it's hard to spot missiles with tiny frontal area, 10 feet above the water.) And (IANA military analyst) I think that there are AWACS-type planes up in the air over a carrier group most of the time when in a war situation and a bunch of other tools in play.

      Nevertheless, it's a point of concern and having a laser that could kill such missiles would be a win. But the biggest win is the elimination of the need for the huge logistics chain to provide ordnance to the ships at sea. If a ship has 10 anti-missile missiles, what do they do when those are all gone? With a laser, all you have to provide is fuel, supplies and maintenance equipment. Nuclear ships don't even need fuel (except for the planes etc.) and have so much excess power capability that adding a few lasers would not make a dent.

      Vid of Brahmos I - caution loud annoying music but VERY fast missile.

      DF-21 Anti-ship ballistic missile

      See also ArcLight (US hypersonic cruise missile), under development - adapted from the RIM 161 missile launched from AEGIS guided missile ships, and launchable from the same tubes.

      --
      It's easier to be a result of the past, but more fun to be a cause of the future! http://www.spacefinancegroup.com/
    38. Re:Serious range disadvantage for naval warfare. by baegucb · · Score: 1

      Maybe they could use an approach such as this: http://bits.blogs.nytimes.com/2010/02/12/using-lasers-to-zap-mosquitoes/

      50-100 mosquitoes shot down per second.

    39. Re:Serious range disadvantage for naval warfare. by John+Hasler · · Score: 1

      It is not as simple as spraying krylon chrome paint on a substrate to create a laser mirror and cooling is an issue but even high power lasers utilize mirrors in the optical cavity

      Yes of course they do but the beam is not focused on those mirrors.

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    40. Re:Serious range disadvantage for naval warfare. by ElderKorean · · Score: 1

      You have to admit that a sea-skipping missile would be hard to hit, though. Of course, it might also be a bit inaccurate...

      Been done before, http://en.wikipedia.org/wiki/Bouncing_bomb
      or even, http://en.wikipedia.org/wiki/Skip_bombing
      Dam wall are pretty big, as are ships if sideon.

    41. Re:Serious range disadvantage for naval warfare. by IICV · · Score: 1

      What if your enemy snuck a civilian boat full of explosives in next to your ship and detonated it?

      Symmetrical warfare, where you are up against an enemy who can afford to throw more than one missile at you, is the past. Asymetrical warfare is the future.

      Right now we're preparing for another 30 Years' War, when World War I is around the corner.

    42. Re:Serious range disadvantage for naval warfare. by MechaStreisand · · Score: 1

      Sailing in other oceans thousands of miles away?

      --
      Disclaimer: IANAL. This post is, however, legal advice, and creates an attorney-client relationship.
    43. Re:Serious range disadvantage for naval warfare. by seeker_1us · · Score: 1
      If you have range advantage, you get to shoot while the enemy can't shoot back.

      Seriously, how this comment got modded insightful is beyond me.

    44. Re:Serious range disadvantage for naval warfare. by jklovanc · · Score: 1

      Return to base, rearm, refuel and sortie against the next carrier. Repeat until all carriers sunk.

    45. Re:Serious range disadvantage for naval warfare. by Vexar · · Score: 1

      That is a very astute observation. Probably not suitable for squads, but definitely for bases, if they can airlift it. And the nuclear reactor to power it. Oh wait. So much technology relies upon electricity and the military is powerless to get beyond its naval reactors. Or those monstrous diesel generators.

    46. Re:Serious range disadvantage for naval warfare. by Vexar · · Score: 1

      Leave it to the French to use a catapult and throw cows at the US Military, defeating so many high-tech toys with mass and velocity. I can just see the battle group comm chatter: "Attention all ships, attention all ships: Run Away!"
      Sonic technology is much more capable than laser technology.

    47. Re:Serious range disadvantage for naval warfare. by SpinyNorman · · Score: 1

      Huh? You seem to be thinking of an artillary scenario or somesuch, where a shot fired on target is as good as a hit.

      What good does it do an enemy to fire a missile at you when you have the ability to shoot it down while it's as far as 10km away??!!

      Never mid that, what does your defensive capability (laser) have to do with the your choice of offense?

      Please engage brain before posting!

    48. Re:Serious range disadvantage for naval warfare. by jarlsberg71 · · Score: 1

      I was wondering about how far the beam will go. We've a lot of space junk up there, Will they know that if they burn through something they could hit a satellite? Or junk drifting in LEO?

      --
      E8B8B
  12. Re:Why scale down? by UDChris · · Score: 2

    Wrong science. This is physics, not biology. Unless you are talking about ill-tempered robotic sharks with frickin' laser beams...

    --
    "Hey, I know what we're gonna do today." -- Phineas Flynn
  13. Laser launchers? by Cheerio+Boy · · Score: 3, Interesting

    Everybody's complaining about the weaponization of this, and I agree they don't need any more toys, but I think this is a good thing because it's a great step towards laser launching systems and away from chemical rockets.

    The military may have done it but it also could be adapted to commercial usages.

    Heck one thing I can think of is dismantling large ships in boneyards. This would be good for any sort of metal recycling in fact.

    --

    "Bah!" - Dogbert
    1. Re:Laser launchers? by Anonymous Coward · · Score: 1

      Which is a ridiculously expensive idea, lasers cost $10,000's per kW of output. Launching rockets requires many GW of power (space shuttle main engines are about 9GW each, close to 50GW total on a spaceshuttle). So if you have a spare few hundred billion lying around for such an endeavour then be my guest.

      Rockets or light gas guns will always beat laser.

    2. Re:Laser launchers? by willy_me · · Score: 1

      Heck one thing I can think of is dismantling large ships in boneyards. This would be good for any sort of metal recycling in fact.

      Hight pressure water jets would be much cheaper for cutting metal. This technology is here and in use today. In addition, the dangers inherit in employees of a recycling yard operating a laser of such power should be obvious.

    3. Re:Laser launchers? by garyebickford · · Score: 1

      Not true. US aircraft carriers are all nuclear powered, so the electrical power for free electron lasers is always available. The biggest single headache for the Navy is logistics - getting bullets and such stuff to the ships in time of war. I don't know if it's still true, but fuel for the trucks in Iraq at one time was costing something like $200 per gallon due to the logistics hassle. And the biggest ships only have room for a small number (under 100) missiles. So during a war it's easy to run out of ammo.

      A nuke ship with an electrically-powered laser has almost unlimited shooting capability, limited only in the firing rate according to the equipment capacity and number of weapons. (Of course there are still logistic hassles for food, repair parts and supplies etc.) I think this is probably at least as important, if not more important, than the speed equation.

      --
      It's easier to be a result of the past, but more fun to be a cause of the future! http://www.spacefinancegroup.com/
  14. Real Genius by mr100percent · · Score: 3, Insightful

    Over 20 comments before someone mentions Real Genius? This was like the plot of the movie itself.

    1. Re:Real Genius by Graff · · Score: 2

      Over 20 comments before someone mentions Real Genius? This was like the plot of the movie itself.

      I thought the plot was about nerds getting laid! The laser part was just a way to move the plot along...

    2. Re:Real Genius by zippthorne · · Score: 1

      The plot was stupid.

      They created an incredibly expensive weapon that could only be used to very accurately kill single person per shot, but through several layers of armor.

      The only possible effect of such a weapon on the nature of warfare would be to change war from a bloody activity in which thousands or millions of commoners sacrifice their lives for the goals of a few powerful elite, to one in which the powerful elite are the targets: A B-1 bomber with a single-shot laser is not exactly the kind of equipment whose expense is justified against infantry.

      It's hard to believe that peace lovers would be opposed to the very kind of weapon that would reduce the bloodshed and put pressure on the very causes of wars...

      --
      Can you be Even More Awesome?!
    3. Re:Real Genius by ScrewMaster · · Score: 4, Interesting

      It's hard to believe that peace lovers would be opposed to the very kind of weapon that would reduce the bloodshed and put pressure on the very causes of wars...

      That's because it isn't. If you start assassinating the enemy's leadership (whether it be with baseball bats or orbiting laser projectors), you're going to start World War III. And, because you've killed off all the people who had the power to say "stop", it will continue until we're all dead.

      --
      The higher the technology, the sharper that two-edged sword.
    4. Re:Real Genius by ScrewMaster · · Score: 1

      Your complaints are stupid. The opening scene showed that the laser was a secret project without any oversight -- hidden from the president and any anyone outside their group -- and when one member of the group in charge decided he couldn't be party to this type of activity, the group ordered his execution (via a thin euphemism). It wasn't that a laser couldn't be used for a reduction in losses, it was that they were obviously going to use it to take out whomever they wanted.

      Correct, which is why a group of college students interfering with a top-secret military project was entirely justifiable within the film's plotline.

      --
      The higher the technology, the sharper that two-edged sword.
    5. Re:Real Genius by blair1q · · Score: 1

      I thought the plot was about being true to yourself. And making popcorn and using near-zero kelvin water as a quarter.

    6. Re:Real Genius by Graff · · Score: 1

      I thought the plot was about being true to yourself.

      Same thing as I said, really! ;-)

    7. Re:Real Genius by ToasterMonkey · · Score: 1

      It's hard to believe that peace lovers would be opposed to the very kind of weapon that would reduce the bloodshed and put pressure on the very causes of wars...

      That's because it isn't. If you start assassinating the enemy's leadership (whether it be with baseball bats or orbiting laser projectors), you're going to start World War III. And, because you've killed off all the people who had the power to say "stop", it will continue until we're all dead.

      I hope you are kidding. We're talking about reality here, not Command and Conquer.

      The logistics involved with keeping a flying megawatt laser operational are nearly ridiculous. Lifting all that to space doesn't make anything easier, and then you have, yay, more atmosphere to deal with. Maybe someday, but hey, maybe someday we'll all have autonomous flying cars too.

      Not to mention the fact that the topic today is the NAVY's directed energy program. N_A_V_Y.
      Those are the dudes with boats, dude.

      Anyway, I think something like THE ENTIRE RECORDED HISTORY OF HUMAN CONFLICTS is proof that constantly evolving weapons don't make war more or less peaceful. What an insane concept, you're both nuts.

  15. Re:ouch by peragrin · · Score: 4, Insightful

    yea right.

    What planet do you live on? But the humans of earth are a jealous lot, full of hate and mistrust, and belief that their way is the only way to live, and that all other ways must be eliminated.

    Before you go spouting off stupid again why don't you take a look at the shear number of fanatics in the world(christian, muslim, jewish, whale watcher, environmentalist, whatever) and decide if your small army will work againist people who don't believe in reason and are willing to fight to the death for their illogic.

    --
    i thought once I was found, but it was only a dream.
  16. Re:ouch by Graff · · Score: 1

    "stop the nonsensitive" eh?

    I disagree, I think we have to stop the overly-sensative!

  17. Re:ouch by Graff · · Score: 1

    Or even sensitive. Lol, I don't know why I even bother to preview when I miss simple stuff like that...

  18. I'm getting by kilodelta · · Score: 1

    A Real Genius moment here. Why would the U.S. Navy need a LASED stream of electrons that can cut through 20 feet of steel?

    1. Re:I'm getting by jklovanc · · Score: 1

      You missed the last part of that statement "per second". One of the biggest issues with laser warfare today is that they take time to burn through an object's outer shell and get at the vulnerable parts. It is difficult to keep a laser on the same spot on a moving object. If that time could be decreased dramatically, as in this laser, that problem would go away. A few millisecond burst, instead of a few second burst, will blow the missile out of the sky.

    2. Re:I'm getting by blair1q · · Score: 1

      The whole thing about laser vs. electron is confusing.

      I think, reading between the lines in TFA, that the electrons are the lasing medium, and the beam is still light. Not sure how they're using electrons as a medium. It's much less clear how they'd use the electrons as a damaging weapon; the average CRT gets them up to 30 kV and doesn't even scrape a single layer of phosphor molecules off the front glass. And electrons, being charged, disperse rapidly when freed from the confines of your directional system. After a few meters it'd be less beam than spray. So, again, it seems to be a lasing medium.

    3. Re:I'm getting by stevelinton · · Score: 1

      The electrons (in the magnetic field they are in) are in effect the lasing medium. They are being accelerated by the magnets so they emit EM radiation. They are relativistic, so that radiation is focused forwards. Finally there is a weird feedback effect whereby the light beam bunches the electrons into bunches one wavelength apart, so that the radiation is coherent.

  19. The Next Step? by Lord+Agni · · Score: 1

    Sharks that can carry those frikkin lasers.

  20. 20 feet of steel? by Chelloveck · · Score: 3, Funny

    What's that expressed as houses of popcorn?

    --
    Chelloveck
    I give up on debugging. From now on, SIGSEGV is a feature.
    1. Re:20 feet of steel? by jo_ham · · Score: 1

      I need to know what it is in horses per submarine, just to get it in terms I can understand.

    2. Re:20 feet of steel? by jo_ham · · Score: 1

      I'm not sure you understand what "whoosh" means.

    3. Re:20 feet of steel? by ScrewMaster · · Score: 1

      I'm not sure you understand what "whoosh" means.

      Yeah ... the GP is a real genius, let me tell you.

      --
      The higher the technology, the sharper that two-edged sword.
    4. Re:20 feet of steel? by TubeSteak · · Score: 1

      What's that expressed as houses of popcorn?

      Assuming an unpopped kernel moisture content of 8.95% (less moisture = more density)
      The true density of unpopped kernels is 1.304 g/cm^3
      The bulk density of unpopped kernels is 0.771 g/cm^3
      Steel density ranges from 7.715 g/cm^3 to 8.050 g/cm^3

      So if the laser can go through 20 ft/sec of steel...
      If you had one giant unpopped kernel, the laser could cut through it at a rate of 120 ft/sec
      If you had lots of loose unpopped kernels, the laser could cut through them at a rate of 200 ft/sec

      So to answer your question:
      2.8 houses of popcorn

      How'd I get 2.8?
      the laser in Real Genius was 5 kilowatts and
      the laser the Navy tested is 14 kilowatts
      14/5 = 2.8 :p

      --
      [Fuck Beta]
      o0t!
    5. Re:20 feet of steel? by blair1q · · Score: 1

      It's about 3.6 smoots per mississippi. Give or take an ear.

    6. Re:20 feet of steel? by ImprovOmega · · Score: 1

      Hand over your geek card.

      The laser in Real Genius was supposed to output 5 MEGAwatts, not kilowatts. But what's a couple orders of magnitude amongst friends?

  21. Re:20 feet of steel, not 200. by Graff · · Score: 2

    Who needs to burn through 20 feet of steel? Or even 2 feet of steel?

    Remember that laser illuminance falls off quite rapidly with distance, especially in humid or dusty conditions. Having the power to burn through 20 feet of steel in perfect conditions at a relatively close range means you'll probably be able to still knock down that missile that's miles away in bad conditions.

    There's also the factor of being able to keep the laser in one spot long enough to do damage. 1 second is a very long time to keep a beam in one spot so you need enough power that even a fraction of a second can do considerable damage.

  22. What's the Blooming Problem? by Aaron_Pike · · Score: 2

    I didn't see any data about blooming or effective range. Any ideas? Is there a physicist in the house?

    1. Re:What's the Blooming Problem? by davidwr · · Score: 2

      As an initial estimate, I'd say loses its effectiveness somewhere between 20 feet and infinity. I realize you were looking for something more precise than this, but it's all I have right now.

      It's possible that anyone with the data to give you a more precise answer would have to kill you if he told you.

      --
      Knowledge is how to play a game, intelligence is how to win, wisdom is knowing what game to play.
    2. Re:What's the Blooming Problem? by ScrewMaster · · Score: 1

      It's possible that anyone with the data to give you a more precise answer would have to kill you if he told you.

      I've always wondered if that would hold up in court.

      "Yes, Your Honor, once I told him, I had to kill him. It was a moral imperative."

      "So then why did you tell him?"

      --
      The higher the technology, the sharper that two-edged sword.
    3. Re:What's the Blooming Problem? by blair1q · · Score: 1

      I just mentioned blooming above, inasmuchas I think it'd make the thing useless at anything like a useful distance. So I don't think it's an electron beam. I think it's an electron-filled chamber being used as a lasing medium. That's the most I could get from TFA.

    4. Re:What's the Blooming Problem? by dak664 · · Score: 1

      Above 3GW laser beams are channeled through the atmosphere (google atmospheric self channeling). Compact FELs have no problem with that power level (short pulses, exponential gain with length) and if you kept one idling there would be a good chance of getting it to fire once when you pull the trigger. After that I suspect it would need a month of repairs.

      The next round of funding must be coming up.

  23. What about mirrors? by jurgenaut · · Score: 1

    If lasers ever become a serious threat against naval vessels, you could attach mirrors to divert the beams. At least around vital areas. Like those Schürzen the germans attached to their early panzer models (prior to tigers and panthers) to take the edge off of russian anti-tank rifles (and allegedly hollow-charge ordnance like bazooka rounds).

    1. Re:What about mirrors? by ScrewMaster · · Score: 2

      If lasers ever become a serious threat against naval vessels, you could attach mirrors to divert the beams.

      Can you? No mirror is perfect, there is always some absorption, and given a beam powerful enough the leakage is going to melt the mirror. Nor do optical mirrors reflect all wavelengths equally: if your laser is tunable you can give the enemy a lot of grief by fiddling with the frequency.

      There's also the issue of specular reflections: the slightest touch of a beam that powerful is going to permanently blind anyone in the vicinity, friend or foe. The collateral damage from a high-powered laser used on the battlefield is likely to be spectacular.

      --
      The higher the technology, the sharper that two-edged sword.
    2. Re:What about mirrors? by garyebickford · · Score: 1

      Oddly enough, one of the advantages of free electron 'lasers' is that they ARE tunable. (I was recently told by a physics student on /. that they aren't technically lasers since they aren't based on population inversion / avalanche.)

      --
      It's easier to be a result of the past, but more fun to be a cause of the future! http://www.spacefinancegroup.com/
  24. Board? by Curialis · · Score: 1

    Yes, the more important question is can it pound a nail through a 6 inch board...oh wait , that wasn't with the laser...

    1. Re:Board? by kilodelta · · Score: 1

      Great quote! That movie was a trip. And how they used the flying laser was priceless.

  25. Re:TFA has no clue what it's talking about by ulski · · Score: 4, Informative

    There some more information to be found here: http://www.jlab.org/FEL/ You could also watch the video http://www.jlab.org/FEL/Movie28.mov , but that was a bit disappointing (no KABOOM).

  26. Is it the right security tool? by Max_W · · Score: 1

    Would this tool help to prevent an event similar to 9/11 or metro explosions?

    Would not a co-development be a better choice?

    1. Re:Is it the right security tool? by blair1q · · Score: 1

      We're currently facing a growing threat from advancing cruise-missile technology. The Chinese in particular have some that we're pretty sure we can't stop no matter what we do. Not a good thing when your ability to win a war depends on keeping your aircraft carriers secure so that you can project air superiority over a major theater and a fleet and your ground troops.

    2. Re:Is it the right security tool? by Max_W · · Score: 1

      I think the 9/11 type, or metro attacks threat threat can be realistically eliminated by the schools, universities, etc.

      This billions could be invested in building something useful, that creates sustainable jobs, not only in one rich country, but in whole Eurasia, Africa and Americas. Say something like this: http://www.et3.com/

      Certainly it is more complicated to organize and to build than a laser gun.

  27. Re:20 feet of steel, not 200. by arielCo · · Score: 4, Informative

    Well, you may drive at 60 miles/hour and not mean to drive for 60 miles. In this case, it could cut through 1/2" steel plating in 1/2 inch / (20 ft/second) = 2 milliseconds. Does that make sense?

    --
    This post contains no rudeness or derision of any kind. All arguments are friendly. Terms and exclusions may apply.
  28. um... by Charliemopps · · Score: 1

    Anyone else a bit concerned about something like this in orbit? There wouldn't be any place on earth safe from it.

    1. Re:um... by dkleinsc · · Score: 2

      There is already no place on Earth that couldn't be completely destroyed by a determined military attack in a matter of hours. What's your point?

      --
      I am officially gone from /. Long live http://www.soylentnews.com/
    2. Re:um... by ScrewMaster · · Score: 1

      Everyone is concerned about the americans; most of them are very ripe for the psych ward.

      Ignorance on a grand scale, I'm impressed. "Most of them". How many is that? A hundred and fifty million? Two hundred million? Three hundred million? You really think that 300 million crazy people managed to accomplish what we have, managed to become the threat that you imagine us to be? Grow up, dude, otherwise you really come off like a pissed-off peon suffering from sour grapes.

      So yes such a contraption in orbit would actually give them total dominion over the world, which is of course what they would like ...

      No, we wouldn't. Why ignorant people like you insist upon attributing to the United States the sort of evil grandiosity more correctly placed upon old-school Russia, (or maybe modern China once the United States is no longer a major player, hard to say what their long-term plans are) is beyond me. We've fought in a number of conflicts since World War II, some on ideological grounds, others for purely utilitarian or economic reasons. However, America is not now, and never will be, an Empire in the sense that the Soviets were. Empires are incredibly expensive and frankly, you're fooling yourself if you believe that we care enough about you to want to occupy your country, that (with only a few exception) you have anything we want. Other than your women. Yes, we do want your women, but we'd much, much rather buy your oil at inflated prices and sell you iTunes tracks.

      And you know what we are going to do about it if it happens? NOTHING, we are just once again going to bend over for the US and take it up the back passage,

      Yep. That's the first reasonable thing you've said. And if so, WHOSE FAULT IS THAT? Are you blaming us for your greed and stupidity?

      in the name of the "almighty" dollar (which nowadays is really a joke, if possible avoid getting paid in dollars, it is Monopoly money, it is basically worthless)

      I can see you failed basic economics. Well, no-one ever said that America-bashing had to be rational, but you'll probably gain a few mod points from people just as ignorant as you.

      --
      The higher the technology, the sharper that two-edged sword.
    3. Re:um... by Jonner · · Score: 1

      Guided bombs in orbit could hit anywhere on Earth too and I don't hear anybody worrying about that. This laser technology isn't anywhere close to being used in a weapon, unlike guided bombs.

    4. Re:um... by Frangible · · Score: 1

      The country most likely to complain about America on the internet is... America. Getting trolled by a 12 year old in New Jersey: just say no.

    5. Re:um... by kevinNCSU · · Score: 1

      Because hiroshima and nagasaki ? No other nation in the world had the guts to pull such a retarded move and kill thousands of people in the blink of an eye.

      You are quite right, other nations (and US) usually did it more slowly with firebombing turning civilian cities into flames so powerful they would literally suck the air and people into them. The Japanese though favored biological weapons:

      "Plague fleas, infected clothing, and infected supplies encased in bombs were dropped on various targets. The resulting cholera, anthrax, and plague were estimated to have killed around 400,000 Chinese civilians.[11] Tularemia was tested on Chinese civilians.[19] Unit 731 and its affiliated units (Unit 1644, Unit 100, et cetera) were involved in research, development, and experimental deployment of epidemic-creating biowarfare weapons in assaults against the Chinese populace (both civilian and military) throughout World War II. Plague-infested fleas, bred in the laboratories of Unit 731 and Unit 1644, were spread by low-flying airplanes upon Chinese cities, coastal Ningbo in 1940, and Changde, Hunan Province, in 1941. This military aerial spraying killed thousands of people with bubonic plague epidemics." (source)

      For comparison the high end estimates for casualties from the combined a-bomb drops are at 240,000 (source). The plague is a much slower death then "blink of an eye" so if we're going to start assigning moral responsibility to countries as a whole as you seem to want to then I think the empire of Japan got off a lot easier then it fucking deserved.

      May I remind you at the end of the day what ended WW2 was the combined efforts of european countries and russians (oh noes the evil russians!) and certainly not the Americans who showed up when the war was about to end anyway and quite conviniently claiming all the credit

      This argument is as deranged and revisionist as the one where people claim the US won single-handedly. Actually doubly so when talking about the Pacific theater as you are. You do realize the Soviet Union only declared war on Japan and attacked 3 days AFTER the atomic bombing of Hiroshima right? But yea, it must be the US that showed up late and took the credit.

  29. Re:ouch by orphiuchus · · Score: 1

    Someone needs to take there toys away from them and stop the nonsensitive before they start testing it on us, which we all know they will, heck disband all military we really just need a small group to protect the environment and or a army that create Harmony between nations.

    I'm pretty sure this was a joke.

  30. Pew, pew, pew... by ivaldes3 · · Score: 1

    Pew, pew, pewwww... Luke, I am your Father.

    --
    http://www.LinuxMedNews.com Revolutionizing Medical Education and Practice.
  31. WTF? by syncrotic · · Score: 5, Insightful

    Wow, that was one of the worst articles I've ever read.

    "To create incredible power requires incredible energy. After all, the more power one puts into a laser accelerator, the more powerful and precise the light beam that comes out on the other end."

    So to "create power" requires energy. Uh, ok... I'm with you, sort of.

    "Scientists there, in coordination with the Office of Naval Research (ONR), injected a sustained 500 kilovolts (KV) of juice into a prototype accelerator where the existing limit had been 320 kV..."

    OK, so they "injected" 500kV of "juice." Fuck you, fox news.

    "According to ONR officials, that laser beam will eventually perform at a staggering âoemegawatt class,â a measure of the laser's strength. Right now, the accelerator at Jefferson Lab is performing at just 14 Kilowatts."

    So wait, the power output of this thing is actually 14kW, and the goal of the program is to reach 1MW. But apparently they were at 10kW four years ago... so what's this article actually about? The fact that they increased the voltage to 500kV from the previous 320kV? Why does that matter?

    "Today, Neil and others have shown that they have the ability to harness super-conducting electron power."

    Oh ok, I guess the big development here is that they're using superconductors... or something. It's tough to tell, because "super-conducting electron power" is a series of words that, when strung together, don't mean a fucking thing.

    "Clearly, the day's events were a feather in everyoneâ(TM)s cap."

    Clearly.

    1. Re:WTF? by PPH · · Score: 1

      So wait, the power output of this thing is actually 14kW, and the goal of the program is to reach 1MW. But apparently they were at 10kW four years ago... so what's this article actually about? The fact that they increased the voltage to 500kV from the previous 320kV? Why does that matter?

      It matters because the Navy is cutting Boeing a check for $163 million. And if they did so without declaring some sort of technological milestone (particularly in todays economy), people would be pissed.

      --
      Have gnu, will travel.
    2. Re:WTF? by Anonymous Coward · · Score: 1

      I know you're dying to hate Fox News at every opportunity possible, but maybe you should direct the hatred at the WRITER of the article. Kelley Vlahos is a freelance writer who contributes to multiple news organizations (many of which I'm sure you agree with politically).

    3. Re:WTF? by syncrotic · · Score: 1

      If the article were on CNN, I'd have said "fuck you, CNN." Anyone can write badly on things they don't understand: it's a media company's job to ensure that they employ competent staff and then review their output before it goes up for the world to see. Clearly, nobody at foxnews.com even proofread that article, much less verified its technical accuracy.

    4. Re:WTF? by necro81 · · Score: 2

      If only I had mod points today - I'd mark you up sky high. It's one of the things that always irks me about most science reporting in the popular media: the inability to tell apart key concepts like "power", "energy", and "voltage." Fox News isn't alone in this realm of ignorance - they just happen to have it elevated to high art. No wonder most adherents to Fox News don't understand our upcoming resource and climate crisis: they've been fed incoherent babble like this.

    5. Re:WTF? by GreatBunzinni · · Score: 1

      So wait, the power output of this thing is actually 14kW, and the goal of the program is to reach 1MW. But apparently they were at 10kW four years ago... so what's this article actually about? The fact that they increased the voltage to 500kV from the previous 320kV? Why does that matter?

      The article may be actually about publicity. In a time where the US government is actively cutting down on expensive US defence projects, those involved in managing those projects must do something in order to keep their precious pet project from being cancelled. One thing that they can do is advertise the project, claim that it's a success and try to shine a light (*snicker*) on their project so that the public is not only aware of it's existence but also supports it, no matter how expensive and fruitless it has been.

      In this case, TFA states two things:
      a) the project is nowhere near it's objective and there is no real chance it will be in the following years (f not decades)
      b) the project is already giving away millions of dollars to multinational defence contractors to build useless toys based on the useless technology the project managed to develop.

      So, they need all the public help they can get to survive the financial cuts the US government is forced inflict to the US's famously huge defence budget. So, in essence what this article amounts to is nothing more than the desperate cries of some people to avoid getting fired from their once cushy job.

      --
      Slashdot, fix your code or at least hire someone who is competent at it to do it for you.
    6. Re:WTF? by blair1q · · Score: 2

      "super-conducting electron power" is a series of words that, when strung together, don't mean a fucking thing.

      in fact, they're oxymoronic

      electrons flowing in 0 resistance generate 0 power

    7. Re:WTF? by garyebickford · · Score: 1

      You read TFA?? Wow. Just wow. :D

      --
      It's easier to be a result of the past, but more fun to be a cause of the future! http://www.spacefinancegroup.com/
    8. Re:WTF? by LongearedBat · · Score: 1

      Um, could it be that Fox News, by embellishing some military advances for non-techies (most of the voters), is simply trying to keep people positive about military spending?

      Don't get too upset about the lack of technical sense in the artice. It's the propaganda that is more worrying.

    9. Re:WTF? by inKubus · · Score: 1

      Fox lies, Fox lies, Fox lies

      --
      Cool! Amazing Toys.
  32. For most people who work with lasers... by Shatrat · · Score: 1

    That's 80 dBm.

    --
    09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
    1. Re:For most people who work with lasers... by camperdave · · Score: 1

      I thought lasers were measured in Gillettes (ie how many razor blades it can burn through per pulse)

      --
      When our name is on the back of your car, we're behind you all the way!
    2. Re:For most people who work with lasers... by Shatrat · · Score: 1

      The problem with that is that most lasers are 0 Gillettes.
      Possibly a better empirical measurement would be how quickly the feds show up if you point one at an airplane.

      --
      09 F9 11 02 9D 74 E3 5B D8 41 56 C5 63 56 88 C0
  33. Re:ouch by dkleinsc · · Score: 1

    "It's all very well to laugh at the military, but when one considers the meaning of life, it is a struggle between alternative viewpoints of life itself. And without the ability to defend one's own viewpoint against other perhaps more aggressive ideologies, then reasonableness and moderation could quite simply disappear. That is why we will always need an army, and may God strike me down if it were to be otherwi..." ZAP!

    --
    I am officially gone from /. Long live http://www.soylentnews.com/
  34. 20 feet of steel by PPH · · Score: 1

    Per second? How thick?

    --
    Have gnu, will travel.
  35. Watts vs Volts? by freshfromthevat · · Score: 1

    They said they were at 10KV four years ago. Now they are looking for 1MW. That's kilovolts vs MegaWatts. The article said they were at 500KV. There is no indication how many watts they are at. The article didn't have enough information to understand how close they are to the goals.

    Volts and Watts are related by Amps. P=IE Watts = Amps * Volts.

    --
    .. Blub falls right in the middle of the abstractness continuum. -- Paul Graham
    1. Re:Watts vs Volts? by garyebickford · · Score: 1

      Only in an indirect sense - a watt is a measure of power. One horsepower == 745+ watts. Big engines (such as on ships) are often rated in KW instead of horsepower these days. Technically a watt is one joule per second. It can also be used to measure thermal (or any other form of) power.

      Since AC current can be measured, and a laser is just a very high frequency AC, I suppose you could count the flow of the light as current, but it's a little weird to do so.

      --
      It's easier to be a result of the past, but more fun to be a cause of the future! http://www.spacefinancegroup.com/
  36. The Best Defense... by javalizard · · Score: 1

    This just in... China learns how to mass produce mirrors and tape them all over their ICBMs.

  37. Re:Egomania at its best by Antisyzygy · · Score: 2

    You realize that the majority of technological advances through human history have been from war technology? There are innumerable applications for lasers like this, more peaceful ones than not. Furthermore, why should the US car what anyone else thinks? Humans come from tribes and tribes fight eachother for resources. Nations are like big tribes. The Chinese are pulling an economic war with the rest of the world, and also spying on everyone. Why shouldn't the US be able to show the Chinese we still have some abilities they don't have and they can't just do whatever they want to us. If we were defenseless you would see quite a few nations trying to step all over us, and probably all over Canada as well.

    --
    That brings me to an interesting point, / . is just "the ramblings of socially-inept, technology-literate news-mongers".
  38. Re:20 feet of steel, not 200. by PieSquared · · Score: 1

    The problem with weaponized lasers has always been that it's hard to keep them exactly on one spot long enough to really do damage. I mean, against a static target you're probably not going to need 20 feet of steel in a second, but if you're aiming at a ballistic missile then maybe you need to get through a quarter inch of steel in a millisecond. Then of course there's the typical "paint a mirror on your missiles" defense - but mirrors aren't perfect, and some fraction of the damage gets through (and once it starts melting, the mirror gets less and less perfect).

    --
    Does a line appended to your comment give your post meaning in and of itself, or only in relation to those without?
  39. Title is misleading.. by dos4who · · Score: 2

    20 feet of solid steel at a 1 micron hole? 20 linear feet of sheet steel at 1 micron thick? What are the exact specs?

    --
    "Yes, I have a Disaster Recovery Plan. It's called my Resume"
    1. Re:Title is misleading.. by the+eric+conspiracy · · Score: 1

      They don't tell how long it will run, either. 20 feet of steel per second for one microsecond etc.

  40. Re:ouch by ScrewMaster · · Score: 2, Informative

    the humans of earth are a jealous lot, full of hate and mistrust, and belief that their way is the only way to live, and that all other ways must be eliminated

    Suddenly the foreign policy and economically destructive wars perpetuated by the United States make sense.

    Uh ... what? Do you really believe that the United States is hell-bent on eliminating other ways of life? Do you really believe that (because if so, that's just bizarre) or are you just America-bashing for fun? I'd say the Soviets did a hell of a lot more in that regard than the United States ever did. Many of our previous conflicts were ostensibly driven by ideological differences (although, if you dig a little deeper you'll usually find that there was more to it than that) but since the Cold War is over we're far more focused on the economic benefit of our overseas campaigns. Which isn't necessarily better, but it still has nothing to do with converting everyone to our brand of representative republicanism. We don't really care how you want to live: just buy our stuff and sell us your oil. Oh, and listen to our music and buy a lot of our DVDs.

    but the truth is that the United States is not paying for a defensive military.

    Why would you ever have thought that? More to the point, what do you mean by "defensive"? Not all conflicts have to be fought on one's own territory to be considered "defensive", and sometimes investments have to be made because of obligations to allied nations. Hell, World War II, if you have the ability to grasp the big picture, was in fact a defensive war. The reality is, though, that we've cut back substantially on our military capability since the end of the Cold War. Why? Because (so it was believed at the highest levels of our government) the world is now safe because the Soviet Empire collapsed, and we don't need all these men and machines. So this idea that America is continuing to build this ever more massive military is just wrong. Period. Furthermore, the current Iraq conflict is stretching our ability to deploy personnel: we just don't have the manpower or equipment that we used to have, even going back to the first Gulf war.

    Whether or not we made the correct choice in downsizing our military machine remains to be seen. But it is most definitely not what it once was.

    --
    The higher the technology, the sharper that two-edged sword.
  41. Re:ouch by peragrin · · Score: 1

    what we use the army for isn't what it is designed for . The US army aren't police and shouldn't be used to keep the peace.

    I also agree that something has to give in the USA spending strategies. However while we may only rarely directly benefit from some of those, things like the internet, UAV's, even submersibles all allow us to see our word and do things that would never come to bear without someone losing tons of money on them to begin with.

    a lot of the really cool tech and refinements out there today are because the USA military spent tens of millions 2 decades ago on abstract and weird ideas that had very little return.

    --
    i thought once I was found, but it was only a dream.
  42. Re:ouch by nospam007 · · Score: 1

    "because the USA military spent tens of millions 2 decades ago on abstract and weird ideas that had very little return."

    Nowadays they spend the millions on training and weapons for Afghan military and police and in the US thousands of teachers and nurses get the boot to pay for it.

  43. Re:ouch by slackbheep · · Score: 1

    Your comment of the purpose of the armed forces vs how they are applied reminded me of a talk Thomas Barnett gave for TED about six years ago.
    http://www.ted.com/talks/lang/eng/thomas_barnett_draws_a_new_map_for_peace.html Interesting idea, even if so ambitious as to never happen :P

  44. Re:Why scale down? by shogun · · Score: 1
  45. So... by WindBourne · · Score: 1

    How soon before we see this on a Chinese ship?

    --
    I prefer the "u" in honour as it seems to be missing these days.
  46. Re:20 feet of steel, not 200. by MachDelta · · Score: 1

    TFA says one advantage of this laser is that, because the wavelength is adjustable, you could theoretically compensate for the atmosphere by picking a wavelength to which the atmosphere is mostly trasnparent.

  47. Re:ouch by abulafia · · Score: 1

    Um, on your intuition that maybe the military should be bigger, what multiple of the rest of the world's force projection capability seems sensible to you? And why? Do you acknowledge that our spending is not static against rivals? That a large, standing army will sometimes be misused? That opportunity costs exist?

    --
    I forget what 8 was for.
  48. Defense against Chinese "Carrier Killer"? by wisebabo · · Score: 1

    I feel dirty about commenting on an article from Fox News but it seems that there was some concern in the U.S. recently about a new long range high speed anti-ship missile which was deemed a possible "Carrier Killer". In addition to its long range, the high speed would make it difficult for the terminal defenses (Phalanx guns) to knock the incoming missile(s) out of the sky in the few seconds they would be in range.*

    Of course, for a laser, a few seconds is an eternity. Probably the big problem would be to ensure the beam would remain on the dwell point long enough for it to burn through the casing. But if these things have good enough targeting to knock down an ascending ICBM from several hundred kilometers away (as in the air force version), I can't imagine it would be a big problem for a ship based version to take out an approaching (read range getting smaller) missile within a few kilometers (or less!). (I realize that a boost phase ICBM is a "fragile" target compared to a possibly hardened warhead with ablative shielding but remember the inverse-squared law! And the vastly easier targeting at short range against a hot infrared target instead of a cold body in space).

    This is a productive use of the hundreds of megawatts of electric power already on tap in a nuclear powered carrier. Against heavier targets (ships) the navy will use rail-guns, also a great user of electric power. (I would imagine the laser would overheat before it could cut through the hull of a warship).

    *The Chinese could defeat this (and probably any defensive system) using nuclear warheads on their anti-ship missiles but they would risk a strategic nuclear exchange.

    1. Re:Defense against Chinese "Carrier Killer"? by sanman2 · · Score: 1

      I thought UCAV drones like the X-47B are supposed to be the planned defense or response to anti-carrier missiles, since such drones could be launched by carriers much beyond the range of anti-carrier missiles like the DongFeng21.

      But as you say, perhaps the next successor to the US Navy's Aegis defense system will use megawatt lasers to immediately neutralize inbound threats like DongFeng21, etc.

    2. Re:Defense against Chinese "Carrier Killer"? by Frangible · · Score: 1

      Liquid-fuel ICBMs are vulnerable during the launch phase; solid fuel ICBMs, however, are almost impossible to destroy. When the Air Force's airborne laser program was canceled, the reasons given by SecDef Gates were very limited range which resulted in a bulky, impractical weapon system that you'd almost have to be hovering above a silo to use. And that was a megawatt-class chemical laser, more powerful than what this technology is.

      I'm not saying laser R&D isn't worth it, but good missile defense is extremely difficult. It will take quite a while before any of these systems surpass something more conventional like the Phalanx.

  49. Most Efficient Laser? by Doc+Ruby · · Score: 1

    While the Pentagon might have $BILLIONS to spend on ever bigger lasers, what I'm more interested in is more efficient lasers. What's the most efficient working laser now? Preferably one that outputs over 100W of light, but the most efficient ones in different output power classes are interesting.

    Presumably the Pentagon is also interested in efficient lasers of medium power, since just laser targeting or even light duty laser cutting is more reasonable to arm a soldier with if it doesn't require a Humvee full of batteries/fuelcells to power it all day.

    --

    --
    make install -not war

  50. Why the US Navy wants a Laser Weapon by bughunter · · Score: 1

    The US Navy is really pushing "ammo-less" weapon systems because of the nature of the threat of the Chinese arsenal, especially the air force.

    In a nutshell, the US could fire everything it had at Chinese jets, and score a kill with each shot, and still face an overwhelming force. The same goes for US bullets and PRC soldiers. So of course they want lasers. All you need is electricity... and lots and lots of technicians.

    (Nobody's asking why the US is attacking China in these scenarios... that's the most bothersome part.)

    --
    I can see the fnords!
    1. Re:Why the US Navy wants a Laser Weapon by Frangible · · Score: 1

      It's the military's job to develop a response strategy to pretty much every scenario imaginable. Zombies, velociraptors, zombie velociraptors, a Red Chinese invasion of Alaska... you know, whatever.

    2. Re:Why the US Navy wants a Laser Weapon by WindBourne · · Score: 2

      America will not. The problem is that CHina is obviously gearing up for a war with the west.

      --
      I prefer the "u" in honour as it seems to be missing these days.
    3. Re:Why the US Navy wants a Laser Weapon by WindBourne · · Score: 1

      Actually, even I have to admit, that I would fear if we got another idiot like W in here, though that is hard to believe. Sadly, Trump, Palin, etc are such idiots.

      --
      I prefer the "u" in honour as it seems to be missing these days.
  51. Most Powerful Laser? by esrobinson · · Score: 1

    The US Navy has broken the existing record for the power of a laser.

    [...]and package it as a 100 kW weapons system[...]

    So, NIF isn't a thing anymore? Or is 100kW more than 500TW and someone forgot to tell me?

    1. Re:Most Powerful Laser? by John+Hasler · · Score: 1

      You confound average power with peak pulse power.

      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    2. Re:Most Powerful Laser? by germansausage · · Score: 1

      You confound us all when you confuse confound with confuse.

    3. Re:Most Powerful Laser? by John+Hasler · · Score: 1
      --
      Warning: this article may contain humor, sarcasm, parody, and perhaps even irony. Read at your own risk.
    4. Re:Most Powerful Laser? by ThorGod · · Score: 1

      I don't care if you did confound something or not - Thanks for the heads up on the NIF! I hadn't heard of the project before.

      --
      PS: I don't reply to ACs.
  52. Re:TFA has no clue what it's talking about by jfb2252 · · Score: 1

    The JLab FEL has three segments: an photocathode raised 350kV and now 500kV from ground, a pair of superconducting (SC) cavities that take the low energy beam to ~8 MeV/c, and a small linear accelerator with 24 SC cavities which takes it to 80-140 MeV/c. Laser is pulsed at 75 MHz to photocathode. The efficiency of conversion of energy from electron to light is highly dependent on the electron bunch shape. It's easier to get a good bunch if you start at 500 kV than at 350 kV.

    Frequency of the output light is determined by the electron energy and the undulator magnetic field.

    Mirrors are cryogenicly cooled and large.

    Outcoupling is via a hole in one mirror. It can be as high as 10% in the IR laser. I don't know the UV number.

    If electron beam quality is high enough one can do without mirrors. The LCLS at SLAC is an x-ray FEL which does this. Search for SASE FEL for more info.

    The JLab FEL uses SC cavities because this allows the recovery of most of the energy of the "spent" electron beam after the lasing section, increasing wall plug efficiency, i.e., light/(power in) roughly a factor of ten. The Navy likes this.

    Cornell has a proposal to NSF to build a light source using an energy recovered linac, ERL.

  53. Re:Egomania at its best by Frangible · · Score: 2

    Yes, keep insulting Americans, on an American server running American software, on an American-created internet, with an American-created computer, while telling us all how negatively America affects your day-to-day life. Though ironically, I'd say your nationality is actually most likely to be... American. And that's all kinds of psychological issues right there... more daddy issues than a season of "Lost".

  54. Atmospheric Attenuation by sanman2 · · Score: 1

    I thought lasers attenuate very quickly in the atmosphere.

    Maybe this will be more useful for zapping enemy space cruisers.

  55. Re:20 feet of steel, not 200. by Graff · · Score: 1

    TFA says one advantage of this laser is that, because the wavelength is adjustable, you could theoretically compensate for the atmosphere by picking a wavelength to which the atmosphere is mostly trasnparent.

    Well, it certainly helps but (speaking as an instrumental chemist here) no matter what wavelength you choose there will always be some absorption and scattering in the atmosphere . There's also beam spread which can be improved through better optics but can't be completely eliminated. All of those factors are dependent on distance and will serve to reduce laser illuminance.

    Greater distances also affect the aim of the beam since what you really control is the angle of the beam. Simple trigonometry will show you that more distance means less control and thus the likelihood increases that you won't be able to get the beam concentrated on a critical spot for a decent amount of time.

    So, you generally want to have a beam energy far above what it would take to make a kill under optimal conditions. You can always build the beam to reduce the length of the bursts or to output a lower energy level if you don't need the extra energy.

  56. Re:TFA has no clue what it's talking about by kevinNCSU · · Score: 1

    Really? This article was written by the same local news channel?

  57. Translamniformism by osu-neko · · Score: 1

    Now all we need to do is upgrade the sharks...

    Geneticists: Workin' on it...

    --
    "Convictions are more dangerous enemies of truth than lies."
  58. Dr. Evil Asks... by blake182 · · Score: 1

    When will this technology be available for shark head attachment?

  59. Re:20 feet of steel, not 200. by couchslug · · Score: 2

    "Who needs to burn through 20 feet of steel? Or even 2 feet of steel?"

    Can you say "industrial metal cutting"? Some metal is laser-cut today, but being able to easily cut large thick steel sections would save even more time/work/money.

    http://www.americanmachinist.com/304/Issue/Article/False/86876/Issue

    --
    "This post is an artistic work of fiction and falsehood. Only a fool would take anything posted here as fact."
  60. Re:ouch by Ihmhi · · Score: 1

    You'd probably enjoy Gundam 00.

    In that anime, the world pretty much has unlimited power thanks to a ring of solar panels around the earth which are tethered to the planet with three equidistant orbital elevators. Three superpowers form around these elevators, and there are more than a few straggler countries who don't play ball and therefore are shut out of the free energy. The superpowers are in a deadlocked cold war with one another. Meanwhile, private military countries fight wars for their benefactors all over the world.

    Enter Celestial Being with their giant robots. This being Gundam, of course everyone has giant robots, but CB's are vastly more powerful. Imagine a fighter jet that had unlimited ammo and flight time and had armor tough enough to take dozens of missiles and thousands of bullets - even if it were just a small strike force of four of these fighters, how many air forces in the world could stand against them? Think that, but instead giant 30 foot tall robots whose pilot aim to end war by (ironically) blowing up any advantage any one side has.

    Technically, this should be the United Nations, I suppose. Someone starts a war and all the other countries should smack them the fuck down. But I don't see that happening anytime soon.

  61. Re:Why scale down? by Sulphur · · Score: 1

    Wrong science. This is physics, not biology. Unless you are talking about ill-tempered robotic sharks with frickin' laser beams...

    No, he meant cute cuddly robotic sharks with simulated lasers.

  62. Ion cannon charging... by Apothem · · Score: 1

    It's only a matter of time now before we start having satellites equipped with this sorta stuff.... AND YOU KNOW WHAT THAT MEANS!

  63. Re:Egomania at its best by Frangible · · Score: 1

    Yeah... well, I've known French people IRL and online, and their main complaint regarding the US was the latency and time zone difference. None of them actually lived up to the "snobby French" stereotype. You also use a number of American English cliches and idioms that they never did. Sorry, but the kind of polemic angst you display is something typically entirely American, a product of our lovely partisan media. The only people I've *ever* seen display strong anti-Americanisms are ... Americans. Your little rants are more anti-American than Juba the Baghdad Sniper propaganda. And that's saying a lot, cause the Iraqi insurgency ain't too fond of us. There's a good deal of the US with French ancestry, myself included. It would be ridiculous. Sorry. Don't see it. You're about as French as FPS Russia is Russian.

    In case you wanted to use Google translate to paste something French-sounding in, allow me to preempt you: Gilles de Rais et de Jeanne D'Arc, héros national. Woah, I'm totally French. Or am I Russian? , , . (You won't find THAT phrase on Google) Point being, what people claim to be, and actually are on the internet are often two entirely different things.

  64. Re:Egomania at its best by Frangible · · Score: 1

    Hah. I guess this thread software can't handle cyrillic unicode.

  65. Re:Egomania at its best by jjohnson · · Score: 2

    Name another country that hasn't been as belligerent and warmongering as they were able to be.

    Yeah, it would be fantastic if the U.S. went all peacenik, but realistically, any country, any people, with their economy and relative safety would (and have, in the past) build up their military and throw their weight around. It's asking a little much for Americans to take an enlightened that everyone else has failed at taking, and crapping on them for not doing it is pretty simpleminded.

    --
    Anyone who loves or hates any language, platform, or manufacturer, doesn't know what they're talking about.
  66. Re:ouch by burnin1965 · · Score: 1

    I wasn't going to reply in this thread, it seems a bit pointless with the cry baby troll moding, but I like your comment so I will reply.

    Uh ... what? Do you really believe that the United States is hell-bent on eliminating other ways of life? Do you really believe that (because if so, that's just bizarre) or are you just America-bashing for fun?

    Short answer, no.

    My comment was an over the top somewhat ridiculous statement responding to another over the top fear mongering paranoid delusional "the world is out to get us" comment. And logically if all humans on earth are such garbage it should follow that people in the United States are also humans who are subject to the listed human weaknesses and threatening characteristics. I know for a fact that people in the United States do not fit this crappy characterisation of humans and I know from the foreigners I have interacted with that it is the same elsewhere. I am sorry that you and the moderators failed to catch that, although your questioning leads me to believe that you may have caught it but were not absolutely sure.

    And on another note, criticism of one's own nation and politics is not bashing. Attacking criticism because it is criticism is tantamount to being a cry baby nationalistic whore. I like your comment because you bring up some valid points but be careful about labeling criticism as bashing. I hope the only reason you mentioned bashing was due to the outrageous nature of my comment.

    we're far more focused on the economic benefit of our overseas campaigns. Which isn't necessarily better, but it still has nothing to do with converting everyone to our brand of representative republicanism. We don't really care how you want to live: just buy our stuff and sell us your oil. Oh, and listen to our music and buy a lot of our DVDs.

    I think many people miss the underlying economic causes of many conflicts and I think it plays a greater role than many would like to admit, it is unethical and evil.

    I was with you on the fact that, perhaps other than religious evangelism in foreign nations, the U.S. people and government are happy to let people of sovereign nations live the way they want in most cases but the 'buy our shit and sell us your resources' policy isn't any better. But perhaps you are alluding to this circumstance when you noted that the economic based campaigns aren't much better.

    Why would you ever have thought that? More to the point, what do you mean by "defensive"?

    Where a battle is fought does not determine whether actions are defensive or offensive but I feel I must point out that defense is much broader than fighting battles. The war in Afghanistan was a defensive war because the United States was attacked the the Al Queda organization that was based in and harbored by Afghanistan and their government. The Iraq war was offensive because there was no credible threat from within Iraq from the government or any harbored organizations. The U.S. Nuclear Forces and the ICBM systems are an offensive weapon used defensively through coercion. Reagan's negotiation of the START I treaty was defensive, the talks between U.S. and Chinese military leaders is defensive, the Patriot Missile system is defensive. Hopefully that elucidates my understanding of "defensive".

    this idea that America is continuing to build this ever more massive military is just wrong

    It is less a question of how much was spent in the past on the military versus what is spent today, the question is how much is needed to achieve the desired objective. Looking at what the United States spends on military versus every other nation suggests to me that we are spending much more than is necessary. To use an automobile analogy, :), if you need a vehicle to commute to work you may want a Bugatti Veyron but that doesn't mean you can't do the same commute just

  67. Re:ouch by kdemetter · · Score: 1

    If your idea is Harmony at any cost ( some sort of global ideology ) , i don't want to live on your world.

    The fact is , there are differences between people , and there are idealists in all groups of people.

    This naturally leads to conflict , but that's not a problem : if those people are allowed to voice there opinion , there may be heated discussions , but the end result will probably be something useful for everyone.

    However, if you block certain ideas and opinions from public debate , then you are causing problems , because you effectively force the idealists to use other methods to impose themselves. And this will often result in violence in the end.

  68. Re:Meh...Wake me when by Tamran · · Score: 1

    They manage to scale the frickin' lasers down to frickin' shark-size.

    They can just manufacture massive sharks in the meantime! With a few camera tricks no one will notice ...

  69. It's still the communists by Msdose · · Score: 1

    After capitalism was made a crime, Reno threatened to jail the bankers unless they gave mortgages to poor people. The bankers asked where they would get the money and the government agreed to lend them 30 times their capital. The resulting inflation in home values resulted in the creation of 23 million jobs during that administration. When the bankers ran out of government money to continue inflating home values, they asked to be able to borrow 60 times their capital. Obama balked. So the banks would have to go bankrupt and lose the 30 times their capital they owed the government. To prevent the public panic from the bank's going bankrupt, the government is buying up the bum mortgages at face value for homes worth a fraction of that. Since capitalism is still illegal, the only productive enterprise other than jailing their citizens for being politically incorrect is to export war to the world.

  70. Re:Source is FOXNEWS?!? Gimm by ThorGod · · Score: 1

    I posted a request for a non-fox news source and was marked a troll. What's happened to /.?

    --
    PS: I don't reply to ACs.
  71. A what kind of laser? by squidflakes · · Score: 1

    I can't believe I'm the only one seeing this...

    Per wikipedia: "To create a FEL, a beam of electrons is accelerated to almost light speed. The beam passes through an FEL oscillator in the form of a periodic, transverse magnetic field, produced by arranging magnets with alternating poles within a laser cavity along the beam path. This array of magnets is sometimes called an undulator, or a "wiggler", because it forces the electrons in the beam to follow a sinusoidal path."

    And we're going to mount this on Naval ships.

    Laser weapons that fire beams of light stimulated by an undulation of electrons, or in other words, some sort of wave motion gun...