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Cern Mass Produces Anti-Hydrogen

Izeickl writes "The BBC is reporting Here about scientists in the Cern particle accelerator in Geneva, Switzerland have mass produced over 50,000 atoms allowing them to test basic Physics using them, however "Harvard physicist Gerald Gabrielse said: "Our long experience with these very difficult experiments warns that antihydrogen may not have really been produced.""

85 of 256 comments (clear)

  1. After the "first post" idiots are through, you can by Zork+the+Almighty · · Score: 2, Funny

    insert Lame Star Trek Joke Here

    --

    In Soviet America the banks rob you!
  2. Re:Cool! by Zork+the+Almighty · · Score: 4, Funny

    Well we could built an anti-computer out of anti-silicon, run anti-windows98 on it, then laugh when the whole thing explodes and blame it on microsoft :)

    --

    In Soviet America the banks rob you!
  3. Re:Cool! by taliver · · Score: 2, Funny

    then laugh when the whole thing explodes and blame it on microsoft

    That would be anti-microsoft, or macrohard.

    --

    I demand a million helicopters and a DOLLAR!

  4. some more links by tanveer1979 · · Score: 5, Informative
    This has meen dome before but its the first time 50000 atoms have been produced. A little more tech info.

    From the horses mouth :-) Athena, the guys who did it
    Nature.com article(PDF)
    home page of the experiment

    --
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  5. I found the perfect way... by roalt · · Score: 2, Funny
    ...to finally spent my billion dollars, see this story.

    Now I know how I want to illuminate my garden!

    Making antiprotons requires 10 billion times more energy than it produces. For example, the antimatter produced each year at Cern could power a 100 watt light bulb for just 15 minutes.
    1. Re:I found the perfect way... by Redoc66 · · Score: 2, Insightful

      "You'd never need oil again, or anything at all except a antiproton factory." ....except billions of times the outputted energy to make them in the first place. While it may have implications for portable fuel, it seems a little hard to believe we will be having anti-fuel for a while.

      --
      Old age and treachery will overcome youth and skill
    2. Re:I found the perfect way... by mbyte · · Score: 2

      Put a station near to the sun, and produce antimatter there. Enough solar energy, and the perfect small medium to transport energy. Now .. only be carefull about that transports ;)

    3. Re:I found the perfect way... by YanceyAI · · Score: 2

      Yeah...Now if we could only keep them from being destoyed when they collide with stray matter, then we could store them!!!

      --
      Can I bum a sig?
    4. Re:I found the perfect way... by Psion · · Score: 2

      Tell it to Al Capone!

    5. Re:I found the perfect way... by jaoswald · · Score: 2

      Actually, if the anti-hydrogen is cold enough, you can store it in a magnetic trap. I believe it has to be of a particular spin polarization to stay trapped, however. Check out this proposal.

  6. Re:Cool! by Alranor · · Score: 3, Funny

    anti-microsoft

    Surely then it wouldn't explode, it would just keep working for a very long time?

  7. Re:Actually one of the first experiments... by Anonymous Coward · · Score: 2, Funny


    of course it will fall down.

    it's anti-hyrogen, and hydrogen falls up, just ask Herr Hindenburg.

  8. Those wacky scientists... by tuxedo-steve · · Score: 4, Funny
    Our long experience with these very difficult experiments warns that antihydrogen may not have really been produced.
    We've produced antihydrogen... just kidding!

    We've discovered Earth-like extrasolar planets... just kidding!

    We've found bacterial life from Mars... just kidding!

    Jeez, these scientist guys need a hobby. :)
    --
    - SMJ - (It's not just a name: it's a bad aftertaste.)
    1. Re:Those wacky scientists... by Mister+Transistor · · Score: 2, Interesting

      You forgot - Element 117 and 118 - Just Kidding!

      --
      -- You are in a maze of little, twisty passages, all different... --
    2. Re:Those wacky scientists... by ComaVN · · Score: 2, Funny

      That would be Justkiddium and Stillkiddium, right?

      --
      Be wary of any facts that confirm your opinion.
    3. Re:Those wacky scientists... by lindelof · · Score: 2, Informative

      As a member of the team that produced antihydrogen I might want to add for information that the author of that comment, Gabrielse, is the leader of a directly competiting team that has been pursuing the same goal using a different approach.

  9. What a coincidence by karb · · Score: 3, Funny
    scientists ... have mass produced over 50,000 atoms allowing them to test basic Physics using [antihydrogen]

    I also have just mass produced over 50,000 antihydrogen atoms!

    however "Harvard physicist Gerald Gabrielse said: "Our long experience with these very difficult experiments warns that antihydrogen may not have really been produced."

    Also, _my_ long experience with antihydrogen tells me I may have not _really_ produced antihydrogen!

    Look, supernintendo chalmers! I'm learneding!

    --

    Jack Valenti and the MPAA are to technology as the Boston strangler is to the woman home alone

  10. I was lucky... by Mister+Transistor · · Score: 5, Interesting

    Enough to actually get to see the antimatter production ring at Fermilab. Once or twice a year, they go into a maintenance shutdown and give small informal tours.

    What used to be the main ring years ago is now the antimatter ring. The magnets were all upgraded to superconductors, and they added buncher/debunchers to the ring to squeeze protons together and apart which, every so often produces a stray anti-proton.

    Cern is way ahead of Fermi in that they are producing full anti-atoms, whereas Fermi is only making anti-particles.

    Definitely forget about efficiency in production, the guy giving the tour said their electric bill is about a million dollars a month, and they make very few anti-protons from all that power! I bet they're ComEd's best customer. They can't run during the summer air-conditioning months, as they would suck too much energy from the grid in Illinois.

    The guide also said as long as the magnets stay supercooled, the anti-protons will stay suspended in the ring for up to a month (unless they hit stray matter and blow up sooner).

    After the tour, we got to play stump the genius - one of the research physicists there was nice enough to give a Q & A session. A most informative and cool tour, getting to see something that most "civilians" never get to lay eyes on.

    --
    -- You are in a maze of little, twisty passages, all different... --
    1. Re:I was lucky... by mt-biker · · Score: 2, Informative

      IMO, CERN's press release is much more informative than the BBC article.

      But CERN's intranet is also readily searchable and apart from the technical details on the new LHC accelerator (which are publically available and make great geek reading) I also find
      this further information on the AD (Antiproton Decelerator), which makes the trapping of antiparticles possible.

    2. Re:I was lucky... by Mt._Honkey · · Score: 3, Informative

      You say they make very ffew antiprotons from all that power, and I guess that in human terms that is correct. However, I'm looking at live readouts at the Tevatron status, and there are currently 48.38*10^10 anti-protons in the antiproton storage ring you speak of, and another 246.92*10^9 in the Tevatron itself.

      Just you give you a sense of how much antimatter is produced. Cern didn't produce much antimattter at all with these 50,000 atoms. Fermilab doesn't produce any antiatoms because they have no use for them. Only negative antiprotons (pbars) are of any use.

      --

      Don't Bogart the fish sticks
    3. Re:I was lucky... by jaoswald · · Score: 3, Informative

      In comparing the quantities, you should keep in mind that the storage rings you are talking about have very "hot" (high kinetic energy) antiprotons.

      The real achievement is to cool the antiprotons down to about 15 K, and combining them with positrons. The yield of that whole process is very low. I.e., you need large quantities of hot antiprotons to produce 50k atoms of "cold" antihydrogen.

    4. Re:I was lucky... by RichN · · Score: 3, Interesting
      What used to be the main ring years ago is now the antimatter ring.

      Sorry. What used to be the main ring is no longer in service. The Antiproton source was operational when the main ring was being used.

      In recent years, we've added the main injector and recycler rings, to help store the antiprotons left over from the collider studies (since they're so costly to make.)

      I bet they're ComEd's best customer.

      Fermi has its own feed from ComEd. In the past, ComEd has been Fermilab's best customer; they pay/credit Fermi in order to tap off some of the capacity. I don't believe this happened this summer, though (since we're in a Collider Run).

      --

      Rich

    5. Re:I was lucky... by Christopher+Thomas · · Score: 2

      The real achievement is to cool the antiprotons down to about 15 K, and combining them with positrons. The yield of that whole process is very low. I.e., you need large quantities of hot antiprotons to produce 50k atoms of "cold" antihydrogen.

      How exactly is this done? It's something I've been wondering about for a while (I've seen descriptions of most other processes associated with particle accelerators).

    6. Re:I was lucky... by jaoswald · · Score: 3, Informative

      This link describes how the ATRAP collaboration cools the ingredients of Antihydrogen.

    7. Re:I was lucky... by Mister+Transistor · · Score: 2

      In the middle of FermiLab there is a pond; the water is used for cooling and I've heard it rumuored that it's "hot" (radioactive). Also, the grounds that the main ring of Fermi occupies is also a forest preserve - we used to joke about the "Home where the Glow-in-the-dark Buffalo Roam"!

      --
      -- You are in a maze of little, twisty passages, all different... --
    8. Re:I was lucky... by Christopher+Thomas · · Score: 2

      This link [harvard.edu] describes how the ATRAP collaboration cools the ingredients of Antihydrogen.

      Interesting. Thanks for the link.

      Do you have a description of how LEAR decellerated antiprotons to 6 MeV in the first place?

    9. Re:I was lucky... by jaoswald · · Score: 2

      Actually, you need 20 feet of anticopper tubing. And anti-H2O cubes. And an anti-SiO2 glass. But your method still works, in principle....

    10. Re:I was lucky... by gorilla · · Score: 2

      I take it that the answer doesn't involve a giant fridge.

    11. Re:I was lucky... by Mt._Honkey · · Score: 2

      Well, that number is a bit odd based on the way that they make the pbars. They take a proton moving at quite nearly the speed of light from the Main Injector with kinetic energy in the hunreds of GeV (a proton has a mass of ~1GeV/c^2) and slam it into a wall (an expensive wall I should think). When the proton stops so suddenly, all of that kinetic energy turns into mass. Some of that mass turns into pbars. An average collision will yield a few pbars, but usualy not more than one will be harvested, sometimes none. Durring the whole accelerating process, lots of energy is lost to cyclotron radiation, because the protons are accelerating (both linearly and centripitaly), thus emitting radio waves (loosing energy). That's a much bigger problem when you are accelerating electrons/positrons, because they have a much smaller mass. That means they emit a whole shitload more cyclotron radiation. Ask someone from the LEP at CERN about that.

      If there are ~200*10^10 protons and ~50*10^10 anti-protons with 1 TeV of energy, that's about 400,000 joules of kinetic energy, or about equal to a bowling ball moving at the speed of sound, or .003 gallons of gas.

      --

      Don't Bogart the fish sticks
  11. Um, a handful? by richie2000 · · Score: 5, Funny
    Antihydrogen has been made before, but only a handful of atoms at a time.
    Now, the Cern particle accelerator in Geneva, Switzerland, has produced more than 50,000.

    Sooo, exactly how many hydrogen atoms are in a handful anyway? My first guess would be in the ballpark of "A hell of a lot more than 50k".

    --
    Money for nothing, pix for free
    1. Re:Um, a handful? by gmcraff · · Score: 2, Funny

      I'm willing to stipulate that combining a "handful" of antihydrogen atoms with a hand of any sort results in not having much of a hand left, nor arm, nor good part of the city you're standing in.

    2. Re:Um, a handful? by Wireless+Joe · · Score: 2, Funny

      I believe a handful is the equivalent of .000000000000000000000000735 Libraries of Congress, or enough to span the width of .075 human hairs.

    3. Re:Um, a handful? by richie2000 · · Score: 2
      Or how about the more commonly used expression "a handful of people"? Would that equal one moderately sized organ, or what?

      I guess that would depend on the size of the organ when the hand grabs it. (boo, hiss!)

      (Oh, the art of selective quoting, a finely tuned craft dating back from the dawn of the first writings of man - "In the beginning, there was *will you kids shut up out there, I can't hear myself think!* ...now, where was I... Damn.")

      --
      Money for nothing, pix for free
    4. Re:Um, a handful? by Myco · · Score: 2

      Wow... how many of those does it take to fill an Olympic-sized swimming pool? What about a football field? If you lined them up end to end, how many times would they wrap around the equator, or stretch from Earth to the sun?

  12. Re:Actually one of the first experiments... by dfgdfgdfg · · Score: 2, Insightful
    Would be to check if it falls down.

    It would fall down because it has the same mass as matter. Antimatter does not have negative mass. Instead, each particle has opposite charge. One antihydrogen atom is composed of an antiproton (negative charge, same mass as the proton), and a positron (positive charge, same mass as the electron).

    On checking in which directory it falls, I think gravity is negligible compared to other forces at the particle level.

    --
    -- 1.e4 c6 2.d4 d5 3.Sc3 de4: 4.Se4: Sd7 5.Sg5 Sgf6 6.Ld3 e6 7.S1f3 h6 8.Se6:
  13. Dimensional Analysis by Wrexen · · Score: 5, Funny

    It's clear at this point that the standard "SI" or metric system is no longer sufficient to describe the events in today's world. As such, the "PS", or "Pop Science" unit system is defined below for those interested by this handy guide

    Information
    Old Unit: bit
    New Unit: Library of Congress

    Time Interval
    Old Unit: second
    New Unit: eye-blink

    Number of Particles
    Old Unit: mole
    New Unit: handful

    Width (small distances)
    Old Unit: millimeter
    New Unit: human hair

    Length (large distances)
    Old Unit: meter, kilometer
    New Unit: football field

    Volume
    Old Unit: cubic centimeter, liter
    New Unit: football stadium

    Energy
    Old Unit: joule
    New Unit: 100-watt-lightbulb-second

    Mass
    Old Unit: gram, kilogram
    New Unit: CowboyNeal

    More units will be assigned as they are needed

    1. Re:Dimensional Analysis by Ryatt · · Score: 2, Funny

      No, no, no... The industry standard for "really big sizes" is always either "Rhode Island" or "Texas". Example: http://www.cnn.com/US/9908/18/iceberg/ "Rhode Island-sized iceberg moves into Antarctic ship lanes"

  14. Still Waiting for AntiMethane by Anonymous Coward · · Score: 4, Funny

    When's it going to happen dammit? I'm dying here. My brother is like a bog in that he produces cubic FEET of methane on a daily basis. And I have been waiting for the day when somebody produces antimethane. Once someone has made antimethane I will put some of it in my brother's boxers and wait for the fireworks and subsequent explosion. Then I will get his room that bastard.

  15. Another setback... by Cyno01 · · Score: 2

    well, if they didn't really produce anihydrogen, then its gonna be even longer before they can produce antideuterium, so i guess were all gonna have to wait even longer for warp engines

    --
    "Sic Semper Tyrannosaurus Rex."
  16. With apologies to Dizzy. . . by kfg · · Score: 2

    Cold Fusion, Cold Fusion.

    KFG

  17. waste of power by abdulwahid · · Score: 2, Interesting

    Making antiprotons requires 10 billion times more energy than it produces. For example, the antimatter produced each year at Cern could power a 100 watt light bulb for just 15 minutes.

    10 billion lightbulbs! So, they used enough electricity to power a small city for a whole year and the result is....they might have been fooled into a false positive result. I am sure there are lots of better ways of using this power rather than chasing gold at bottoms of rainbows

    --
    perl -e 'print $i=pack(c5, (41*2), sqrt(7056), (unpack(c,H)-2), oct(115), 10);'
    1. Re:waste of power by N3WBI3 · · Score: 2
      Yea and why did we bother wasteing the time and money it took to learn to fly, we could have bought more cars/gas with that money, and speaking of cars do you know how many horses we could have fed with that R&D?

      This is a new and exciting field which could someday make space travel practical (for no toher reason than you can store alot of energy in a small area). The more you do it the better you get at it, and the cheaper it gets.

      By the way, hows that flat world working out for you?

      --
    2. Re:waste of power by be-fan · · Score: 2

      Yes. Because they advance humanity. It is impossible, with our current resources, to pull people out of poverty. It is work like this that will one day give us the chance to pull humanity out of the gutter. Back when some crazy's were fooling around with dead human bodies, nobody cared. Now, we call them doctors and thank them for delivering us from the horrors of disease. Besides, don't you think there are better uses for the power used by your computer than posting on /.?

      --
      A deep unwavering belief is a sure sign you're missing something...
    3. Re:waste of power by be-fan · · Score: 3, Insightful

      1) First, this is a drop in the bucket. CERN is one of only a few entities using this kind of power. Take a look at the 55,000 home figure. Say these are your Asian homes, and you end up with 550,000 homes that could be powered by the energy used at CERN. Given the masses of humanity, that adds up to NOTHING. Certainly not enough to justify the potentially disastrous consequences to humanity that could result if we stop this kind of research. The average utility bill at Fermilab (US counterpart to CERN) is 1.5 million dollars. Over the course of a year, thats $18 million. In comparison, the USAID annual budget is $6 billion. The Federal Highway program's budget on the other hand, is $26 billion. Yes, people would rather fix potholes than develop countries. Such is the world we live in. But its not like research money is coming out of the mouths of the poor. The real problem isn't that the world spends too much on research (if only). The real problem is that people have no clue about anything outside the bounds of their tiny meaningless existance. For example, most people, when survayed, said that they thought the US spends too much on foreign aid. When asked how much they thought was appropriate, they said 5% of the budget. The real figure is one-tenth of that number. There are dozens of things you can do to make up the cost of this research, including improving distribution methods, bringing down cultural barries that make access to healthcare inefficient, reforming patent conventions that jack up the cost of medications, etc. In the end, science is not the thing to sacrifice for humanity. BTW, I grew up learning stuff about international development from my dad (that's his line of work), and I was born in Thailand and spent part of my childhood in Bangladesh. I *do* know what I'm talking about.

      2) We're not talking about the "many marvelous inventions in the last, say, 20 years." We're talking about how physics has redefined the universe was we know it over the last 200 years. A large percentage of the modern economy owes its existance to quantum physics. The work at CERN is simply an extension of the very ancient search for knowledge about the structure of matter. Anytime you get a cat-scan or an X-ray, take medicine, use a computer, drive a car, watch TV, etc, you're directly benifeting from that research. Even those in inpovrished countries should thank this research for allowing scientists to use advanced imaging tehnologies to create things like TB vaccines that sells for dollars per dose. Going into the future, the only sure way to relieve poverty is to find more resources. It is not possible for the human population to keep growing, expanding, evolving, reaching towards a higher state of being, without more raw matter. So yes, that warp drive space ship WILL help the guy living in poverty, if you stop being so short-sighted. Giving a man a fish is not the only way to help him.

      --
      A deep unwavering belief is a sure sign you're missing something...
  18. Jealousy... by JimPooley · · Score: 3, Funny

    Harvard physicist Gerald Gabrielse said: "Our long experience with these very difficult experiments warns that antihydrogen may not have really been produced."

    Meanwhile scientists at CERN say "The yanks are just jealous because we beat them to it."

    --

    "Information wants to be paid"
  19. Re:Actually one of the first experiments... by hatchet · · Score: 2, Informative

    Actually in vacuum hydrogen would fall down. And those anti-matter particles are created in vacuum (held in place by strong electromagnets).. but they probably wouldn't "fall up", because the only thing that differs between particle and antiparticle is it's spin. (it's not really the speed particle is rotating at.. but more like internal momentum).

  20. George Bush says... by MosesJones · · Score: 5, Funny

    "We must stop these anti-hydrogen terrorists, I am informed that hydrogen is in things we use everyday like coke, and is even vital to Americans' survival. These people who are anti-hydrogen are anti-american and are seeking to destroy the very basis of our society, you can not be a friend of america if you are not a friend of hydrogen"

    --
    An Eye for an Eye will make the whole world blind - Gandhi
    1. Re:George Bush says... by N3WBI3 · · Score: 2

      Tries for GWB to get masters =1, Tries for Al Gore = at least 2, (and he failed out of divinity school, cmon how do you fail God school??)

      --
    2. Re:George Bush says... by Mt._Honkey · · Score: 2
      Anyone see the daily show last night?

      Bush on Iraq: There's an old saying we have in Tennessee, in Texas, it's probably in Tennessee too. Fool me once, shame on... ... shame on you. ... ... ... ... ... Fool once not fool me again.
      In the grand scheme of things, it's not that important, but it is freakin' hilarious.
      --

      Don't Bogart the fish sticks
    3. Re:George Bush says... by Hard_Code · · Score: 2

      "America is a very noble nation." *ducks*

      --

      It's 10 PM. Do you know if you're un-American?
    4. Re:George Bush says... by Fugly · · Score: 2

      Actually, according to the transcript at whitehouse.gov, the actual quote is:

      There's an old saying in Tennessee -- I know it's in Texas, probably in Tennessee -- that says, fool me once, shame on -- shame on you. Fool me -- you can't get fooled again.

      I cannot believe they actually post a word-for-word transcript in a press release on the white house website. It cracks me up. We elected a fucking rocket scientist didn't we?

    5. Re:George Bush says... by Myco · · Score: 2

      Kinda depends what you mean by "we" and "elected," but yeah.

    6. Re:George Bush says... by G-funk · · Score: 2

      We elected a fucking rocket scientist didn't we?


      Um.... as far as I knew, you elected the other bloke, but the courts decided you could all go jump :)

      --
      Send lawyers, guns, and money!
  21. Mass-produced? by Anonymous Coward · · Score: 4, Funny

    The BBC is reporting Here about scientists in the Cern particle accelerator in Geneva, Switzerland have mass produced over 50,000 atoms allowing them to test basic...

    Wouldn't it be a bit more correct to say that that've been anti-mass-produced? ;-)

  22. Allow me tranlsate... by jdreed1024 · · Score: 2
    Harvard physicist Gerald Gabrielse said: "Our long experience with these very difficult experiments warns that antihydrogen may not have really been produced."

    "Shit! Those pesky Swiss folks got there first. Quick, let's discredit them. After all, that's what professional scientists do."

    --
    There is no sig, there is only Zuul.
  23. Combine with anti-oxygen and... by shoppa · · Score: 5, Funny
    Now all they need to do is
    1. make some anti-oxygen
    2. combine it with anti-hydrogen in a 2:1 ratio
    3. to make anti-water
    4. Drink it and you get thirsty!
    1. Re:Combine with anti-oxygen and... by Hittite+Creosote · · Score: 5, Funny

      As long as 'thirsty' is another word for 'every atom in your oesophagus exploding'...

    2. Re:Combine with anti-oxygen and... by Hard_Code · · Score: 2

      New! Instant dehydrated food! Just add anti-water!

      --

      It's 10 PM. Do you know if you're un-American?
    3. Re:Combine with anti-oxygen and... by Tackhead · · Score: 2
      > As long as 'thirsty' is another word for 'every atom in your oesophagus exploding'

      So the only difference between antiwater and any other soft drink is that the TV advertisements for it would be accurate descriptions of reality?

      Hey, that would be a revolutionary breakthrough!

    4. Re:Combine with anti-oxygen and... by Tablizer · · Score: 2


      Or suck in some anti-helium and speak in a low tone, like James Earl Jones.

  24. Description of Antihydrogen... by cyrek · · Score: 5, Informative

    There's a simple and to-the-point description of Antihydrogen at the Wikipedia.

    Bizarrely, the person responsible for the original submission is typing this sentence right now. Thankfully, brighter people have improved upon it somewhat since then... :)

    --
    Insert witty sig about inserting witty sig here, here.
  25. Anyone Else... by Njoyda+Sauce · · Score: 2, Interesting

    Find it odd that this was filed under toys? It'd certainly be the biggest most expensive toy on the market.

    --

    You can only be young once, but you can be immature forever.
  26. Here is my lame Star Trek reference by jmcwork · · Score: 5, Funny

    You can tell they are anti-hydrogen because they all have little goatees and a really bad attitude.

    1. Re:Here is my lame Star Trek reference by Enry · · Score: 2

      And Worf would rather not talk about it.

    2. Re:Here is my lame Star Trek reference by JabberWokky · · Score: 2
      obPedanticTrekCorrection:

      No, that's MirrorHydrogen. Anti-hydrogen requires a tiny ship, and a man named Lazarus.

      (And even then, why bother doing a Trek reference? Antiparticles exist there already with semi-sensible properties, just adding a few whizbang technobabble sidecars for stuff like FTL travel and such).

      --
      Evan (reference, but a damn obvious one)

      --
      "$30 for the One True Ring. $10 each additional ring!" -- JRR "Bob" Tolkien
  27. Re:Actually one of the first experiments... by esonik · · Score: 2, Informative

    because the only thing that differs between particle and antiparticle is it's spin

    that's wrong, it's the electric charge that is opposite for particles and their antiparticles. The total spin (magnitude of spin) is the same for both and the actual spin vector is not a fixed property for a particle (except when it's zero).

  28. Anti-hydrogen by balloonhead · · Score: 4, Funny
    I just want to see what happens when they stabilise it, then we can see both hydrogen, and his evil twin, anti-hydrogen, fight.

    --
    This idea was invented by Shampoo.
    1. Re:Anti-hydrogen by bravehamster · · Score: 2
      I just want to see what happens when they stabilise it, then we can see both hydrogen, and his evil twin, anti-hydrogen, fight.


      Anti-hydrogen is the one with the goatee, right?

      --
      ---- El diablo esta en mis pantalones! Mire, mire!
  29. Re:Is that something we should be conCERNed about? by N3WBI3 · · Score: 2
    Our last president attacked the Yugo's not becaus eof their strenght but because he had to admint "I *DID* have sexual relations with that woman, Ms Lewinski"

    While I say if the inspectors are there, tommorow, and can go anywhere they want (when they want) dont attack. I doubt this is really the case, there are U@ photographs from the last batch of inspectors showing truckload of equipment being moved hours before UN inspectors show up. Iraq is not holding up to its end of the bargin to end the 1991 Gulf war..

    --
  30. In an alternate universe somewhere... by DysonSphere · · Score: 2, Funny

    A slight glow emits everytime they turn this
    thing on.

    ----------

    --
    Mommy. What's a karma whore?
  31. You seem to be confused... by hackwrench · · Score: 2

    Don't you know that not being in the United States only means it is a prime candidated for being bombed to oblivion as a source of terrorist materials or taken over by the DoD. The United States doesn't need to destroy or take over things it already possesses. Why do you think it has so many overseas bases.

  32. Re:Allow me translate... by Raindeer · · Score: 2

    Like a famous Dutch physicist said. If one does research with American scholars, one is sure to be reduced to "a dutch scholar" or "an european scholar".

  33. I guess ... by Scholasticus · · Score: 2, Informative

    for a handful the hand would have to be really, really small. By the way, has anybody thought about the fact that even if we could produce antihydrogen in large quantities, it would be pretty useless as a source of energy. Since its charge would be neutral, you couldn't contain it magnetically. You would have to use antiprotons or an anti-element with a positive or negative charge..

  34. Conversion factors for PS to SI units by yerricde · · Score: 2

    Library of Congress

    Close to 80 terabits.

    eye-blink

    Equals 0.1 second. Yes, when you blink your eyes, you miss 10 whole frames of your precious Quake III. Would it be possible to detect closing of eyes and turn off rendering for a split second, giving those cycles to (e.g.) your niced distributed.net or Folding@home client?

    handful

    Depends on molar density (mol/L but not molarity because it isn't a solution). This is the only one I couldn't find a definite conversion factor for.

    human hair

    Close to 50 to 100 micrometers.

    football field

    Approximately 110 m, for both soccer and NFL football. Canadian fields are longer.

    football stadium

    NFL's Cleveland Browns play in a stadium with a volume of about 3 million cubic meters.

    100-watt-lightbulb-second

    Given that a watt of power is a joule of energy per second, this equals 100 joules. A kilowatt-hour equals 3.6 megajoules. A horsepower is about 750 watts, so a horsepower-hour is 2.7 megajoules.

    CowboyNeal

    Assume 90 kg.

    --
    Will I retire or break 10K?
    1. Re:Conversion factors for PS to SI units by Myco · · Score: 2

      Well, we can just assume he's a uniform sphere of water...

  35. Mass production? by WolfWithoutAClause · · Score: 2
    Cool, how much per kilogram?

    I'll take a tonne. When can you deliver?

    --

    -WolfWithoutAClause

    "Gravity is only a theory, not a fact!"
  36. Re:Ok, I'm a chemist... by szero · · Score: 2, Informative

    Suspension between the superconducted charged magnets.

    --
    "The more you know, the less you understand."
  37. Re:Somewhere in bizarro land by schon · · Score: 2

    If they get up to anti-oxygen can they make trace amounts of anti-water?

    I thought we already had anti-oxygen... isn't that the stuff that gets rid of those free radical thingys that cause cancer?

  38. Idiots guide to story posting by Mulletproof · · Score: 2

    Cern Mass Produces Anti-Hydrogen = "Our long experience with these very difficult experiments warns that antihydrogen may not have really been produced."

    WTF. So even though they said themselves they are far from certain, you go ahead and post it as fact? Kudos to the editors too... Uhhhg...

    --
    You need a FREE iPod Nano
  39. Re:why to suspect the results by jaoswald · · Score: 2

    Reading the paper, I'd say the reason to be suspicious is that they seem to only have detected the radiation due to matter-anti-matter annihilation, with the requirement that an anti-proton and positron event happen at pretty much the same time and place. Then they use various comparisons to give additional confidence in the result.

    However, as they say, they can't tell what quantum state these atoms are in.

    Until they see [anti]hydrogen spectral lines, I'm not 100% sure they have real anti-hydrogen atoms; for now, I'd say 85% sure. Maybe Gabrielse knows of some ways that the same signature can be generated by other crap thrown around by the trapping and mixing processes.

  40. But why??? by zpengo · · Score: 4, Funny

    Personally, I'm holding out for anti-helium. That'll make me sound like Barry White, right?

    --


    Got Rhinos?
  41. Question by Fjord · · Score: 2

    One thing I've been wondering about anti-matter, does it have anti-gravity, which attracts other anti-matter but repels regular matter?

    --
    -no broken link
    1. Re:Question by Peter+T+Ermit · · Score: 2
      Level 1 answer: A positron is a lepton and an antiproton is a baryon, so they can't annihilate each other.

      Level 2 answer: The capture of a positron by an antiproton is possible, but very unlikely, because it's energetically unfavorable.

      Level 3 answer: You're proposing the k-capture of a positron by an antiproton, which would yield an antineutron and a neutrino. Since the antineutron has more (anti)mass than the antiproton, the probability of this is extremely small, just as it's quite unlikely that a hydrogen atom will k-capture its electron and become a neutron. The reverse process, beta decay, *is* favorable, which is why a neutron can (and will) spontaneously become a proton and an electron (and antineutrino.) (Half-life of around 10-15 minutes, IIRC.) Presumably, an antineutron would also decay via a W-boson exchange into an antiproton, a positron and a neutrino. Measuring the properties of this decay and comparing it to the beta decay of a neutrino would be a *very* cool experiment.

  42. Correction by geekoid · · Score: 2

    Volume
    Old Unit: cubic centimeter, liter
    New Unit: state

    --
    The Kruger Dunning explains most post on /. http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect
  43. Much less.... by deathcow · · Score: 2


    The UNIVERSE IS GREEN !

    Wait...

    The UNIVERSE IS TAN !