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What Are Must-Sees For Open Day At the LHC?

ribasushi writes "The last open day at the Large Hadron Collider is one week away. While I have a solid chance to go, I am dumbstruck by the insane amount of things to see during the 10 hours of the event. Since I do not know all that much about physics, I am turning to the knowledgeable crowd here at Slashdot — what do you think are the most awesome 5 must-see things on the agenda next Sunday?"

210 comments

  1. Obligatory by evanbd · · Score: 5, Funny
    1. Re:Obligatory by Brian+Gordon · · Score: 1

      Fails at oblig.. someone link the hadron collider motivator and as many div by 0 catastrophes as possible

    2. Re:Obligatory by Anonymous Coward · · Score: 5, Funny
    3. Re:Obligatory by Anonymous Coward · · Score: 3, Funny

      I am turning to the knowledgeable crowd here at Slashdot You must be new here.
    4. Re:Obligatory by Anonymous Coward · · Score: 1, Insightful

      Hot female scientists!

    5. Re:Obligatory by dapyx · · Score: 1
      Reminds of Seinfeld on what men do to attract the females:

      "That's why we're building bridges, climbing mountains, exploring uncharted territories. You think we want to do these things? Nobody wants to build a bridge. It's really, really hard! Designing rockets flying off into space. I guarantee you, every astronaut when he comes back from space, goes up to a girl and goes:" So, did you see me up there?"
      Now, on a more serious tone, a picture which gives a sense of scale of the LHC: http://farm3.static.flickr.com/2168/2163618172_6e7d2ec0dd_o.jpg Wikipedia says that "The collider is contained in a circular tunnel with a circumference of 27 kilometres (17 mi) at a depth ranging from 50 to 175 metres underground." and that it crosses the French-Swiss border in four points.
      --
      I'm sorry, the number you have dialed is an imaginary number. Please rotate your phone 90 degrees and dial again.
    6. Re:Obligatory by Plutonite · · Score: 1

      Hot female scientists! ??
    7. Re:Obligatory by Gromius · · Score: 1

      Okay this reply is nothing to do with the parent. Its shameless top whoring. Mods, your call. I've got karma to burn on this. But the next half a page is only +5 funnys and doesnt answer the question.

      That out of the way, you must see CMS or ATLAS, preferably both. This really is your last chance to see them. I work on CMS and even I probably will have major difficulties seeing it ever again after this saturday. The shear scale of these detectors are breathtaking, they are several stories high and look every inch of what you would expect, ie large hunks of detector and huge amounts of cables everywhere. It gets even more mind blowing when you release that these huge detectors are designed to detect subatomic particles. That lump of lead on CMS will manage to accurately detect a single photon by completely absorbing its energy.

      To make it even more enticing, these detectors (and I say this fully believing this) are likely to produce a fundamental change in physics. Basically we are going to find something new, our theories break down at this scale (WW scattering will violate unitary if theres no new particles). In 1-10 years we will have a new breakthough. In 40-70 years, the discoveries here made by those detectors may well underpin our entire society (compare with quantum physics producing the transistor). Wouldnt you want to be able to see the machines that made this possible shown to you by the people that built them if you had the chance?

    8. Re:Obligatory by Pictish+Prince · · Score: 1

      Hot female scientists! ?? Well, it's in Europe - so yeah!
      --
      Only his tendency toward a dazed stupor prevented him from screaming aloud.
  2. I think I am not alone when I say... by Anonymous Coward · · Score: 0

    strangelets? Best if it get lose and suck in certain individuals...

  3. Black Holes by thegrassyknowl · · Score: 3, Funny

    Why not go see the black holes. You'll finally be able to answer the question of what's on the other side of one!

    --
    I drink to make other people interesting!
    1. Re:Black Holes by lahi · · Score: 5, Funny

      Nah, black holes suck!

      -Lasse

    2. Re:Black Holes by arth1 · · Score: 1, Insightful

      The whole reason they're called "black holes" is because they're invisible. You can only observe them by the effect they have on their surroundings, outside the event horizon.

      I suspect that for most people, there isn't anything of interest to see at the LHC. Miles of corridors, rather non-impressive machinery, and a bunch of workstations. The receptionist might be the most spectacular sight. The results from the LHC will be interesting, but those you don't have to go to the site to see.

    3. Re:Black Holes by Anonymous Coward · · Score: 0

      Maybe we could use them to dispose of fission waste and CO2!

    4. Re:Black Holes by HuguesT · · Score: 4, Informative

      Black holes are not invisible on two accounts.

      1- They emit black body radiation at the Hawkings temperature due to quantum evaporation, which for a tiny black hole is very high. A black hole created by an accelerator, composed of the mass of a few particles would likely be extremely hot for a very short time, and so would emit gamma rays. Wikipedia has the calculation for a 1kg BH : the lifetime is approximately 10^{-16} seconds, and the energy output equivalent to the complete anihilation of the 1kg mass (you don't want to be around). Small black holes are *fierce*, however subatomic ones don't really matter. After all accelerators anihiliate particles all the time.

      The above is the #1 reason BH potentially created by accelerators are not a concern.

      2- Even very large BH are in fact directly visible. They reflect light better than a highly polished metallic sphere.

      These two facts are direct illustrations that most people, including well-educated scientists, don't know the first thing about BH.

    5. Re:Black Holes by MindKata · · Score: 4, Funny

      "Maybe we could use them to dispose of fission waste and CO2"

      They could sell the Black Holes they make in their gift shop, so everyone can have a Black Hole waste disposable system at home.

      I can't wait for the LHC Gift Shop to start selling Small Hadron Colliders ... then I can make my own Black Holes at home!

      --
      There are 10 kinds of people in the world... those who understand binary and those who don't.
    6. Re:Black Holes by killmofasta · · Score: 1

      How can you see a 'black hole'? They dont emit visable light.
      You havent seen a black hole, you dont see one, and you NEVER WILL.
      By definition, a black hole does not emit light. it is massive enough to NOT EMIT LIGHT,

      or you some kind of hybrid battle mech that can 'see' gamma rays?

      Have you seen Stevie Wonders House? He hasnt either.

    7. Re:Black Holes by bcmm · · Score: 1

      I think you either didn't read the link you posted, or don't know what "reflect" means.

      Your link is talking about light being bent by the hole's gravitational field.

      Don't be so quick to criticise those "well-educated scientists".

      --
      # cat /dev/mem | strings | grep -i llama
      Damn, my RAM is full of llamas.
    8. Re:Black Holes by Technopaladin · · Score: 1

      2 things.

      1. We dont know what micro Black holes look like, welcome to science and one day we might see one.

      2. Massive Black holes are invisible..2 reasons a. They are Black and Space is black. Thats basic logic sheesh. b. like almost all things that far away we see them by the radiation or effects they create or alter. We dont SEE them we see what they do. THat of course creates an interesting conumdrum what do we really see? That I will leave to the philosophers.

    9. Re:Black Holes by Anonymous Coward · · Score: 5, Informative

      I am a theoretical physicist and 1) is entirely correct while 2 is misleading at least.
      First what is a black hole? Let's say we mean the event horizon. That does not reflect light at all. However, the gravitational field surrounding the BH will of course deflect light the same way the gravitational field around a massive star for example would. Therefore the OP was entirely correct, we can only see the effect of the gravitational field but not light emanating from the BH itself. (At least for astronomical BHs that are very massive and have correspondingly low Hawking temperature). Even taking Hawking temperature into account a BH never reflects light, it has a temperature and gives off perfect black body radiation (in the semi-classical approximation which is the only thing we really know about). That is the black hole information paradox, the outgoing radiation seems to have no information about the ingoing one.

      A super-massive blackhole in empty space would be one of the darkest objects you could think of (arbitrarily cold, negative specific heat, yadda yadda). Put some infalling matter around it and you get very bright and energetic processes so BHs can power very bright objects in their vincinity. Put some galaxies and stars behind it and it can lense the light coming from these, put some stars in front it and it can deflect a small amount of light so strongly that it comes straight back at you. That is really due to the space time structure induced by its mass, you don't need a BH for either of these effects. Furthermore you wouldn't say a lense is very bright would you? Nor that it reflects light.

    10. Re:Black Holes by Anonymous Coward · · Score: 0

      Nah...I'd prefer the black holes come to me.

      /My tinfoil hat will protect me

    11. Re:Black Holes by philspear · · Score: 1

      All this arguing about would you be able to see a black hole or not to me indicates that the single most important thing we can do with this collider is make as big a black hole as we can and put someone inside to see if they can see it or not.

    12. Re:Black Holes by Anonymous Coward · · Score: 0

      I am a theoretical physicist and I am working on a way to eat my own butt.
      We should get together to talk about theories and butt eating.
      After all, if you want to see a black hole, just offer to eat some butt.

      oops, i meant "brown hole" dang it.

    13. Re:Black Holes by arth1 · · Score: 1

      1- They emit black body radiation at the Hawkings temperature due to quantum evaporation, which for a tiny black hole is very high

      You don't see the black hole itself, you see the effect of gamma rays hitting nearby matter. Or did you imply that gamma rays are visible to you?

      2- Even very large BH are in fact directly visible. They reflect light better than a highly polished metallic sphere.

      This claim requires a reference.

      You also seem to forget that black holes curve light around them. If you have a black hole in front of a sheet of light, the light from behind it will bend around it and hide that it's there. You'll see shifts in colouring over a diffuse area, but not the black hole itself. In reality, it becomes "invisible", except for its effects on others.
    14. Re:Black Holes by amn108 · · Score: 1

      Oh, they suck BIG time!

    15. Re:Black Holes by Impy+the+Impiuos+Imp · · Score: 1

      In some sci-fi I read a long time ago, they estimated a black hole would have to be about 1 cm in size before it would consume faster than it evaporated, if dropped into the Earth.

      So you'd only have to worry about a black hole "eating" the Earth if it were about one centimeter in size. It's doubtful the LHC will create any such thing larger than a subatomic particle.

      I assume the sci-fi was based on some numbers a real scientist ran somewhere.

      Some kind of exotic, lower-energy matter is another story entirely though.

      --
      (-1: Post disagrees with my already-settled worldview) is not a valid mod option.
    16. Re:Black Holes by pikine · · Score: 1

      How can you see a 'black hole'? They dont emit visable light.

      No, but its gravitational field distorts light like a lens. It can bend light more than 180 degrees (imagine photon traverses black hole like a comet approaching the sun), so some part of the image might actually be reflection, like a mirror.

      --
      I once had a signature.
    17. Re:Black Holes by Anonymous Coward · · Score: 0

      Only if you change the meaning of the word reflect....

    18. Re:Black Holes by killmofasta · · Score: 1

      >>How can you see a 'black hole'? They dont emit visable light.

      >No, but its gravitational field distorts light like a lens.
      Which is not light emitting. The Article shows light paths, making a U turn. Interesting, but again, not emitting.
      Einstien, predicted gravitiational lenses. We found some. Black holes could act as gravitational lenses.

      > It can bend light more than 180 degrees (imagine photon traverses black hole like a comet approaching the sun),
      Then light could also orbit a black hole. It is still not emitting light.

      >so some part of the image might actually be reflection, like a mirror.
      See yourself in a black hole recently? The article shows a diagram that shows a few possible light paths. It would appear as a perfect reflector, but only as a ring around it. The black hole itself, is ... ( ready? there will be a quiz later..) Black!

      What this from Science Daily? I cant find out since I have banned their IPs.

    19. Re:Black Holes by HuguesT · · Score: 1

      Hi, thanks for the reply. Your points are well taken but besides mine.

      Why don't you read the book chapter I linked to and reply to the points it makes ? I find it very enlightening ;)

      I'm only a mathematician and computer scientist, but J.P. Luminet, the author of the chapter I linked to in the GP, is definitely a physicist and a specialist on BH as well as a great writer. In it he compares the light output of a number of bodies, including a perfectly black, matte sphere, a highly polished metallic sphere and BH when all 3 are illuminated by a light source close to the observer. A BH reflects more light at the observer than the other two, and hence is more visible.

      BH actually reflect light. Not in the usual, mirror-like sense, but by gravitationally bending the light around it. Interesting, no?

      A very cold, dark, matte sphere would be less visible than a BH, so the latter is not the darkest object one can think of.

      So don't take it personnally, but I think you fall into the well-educated scientist who doesn't know everything about BH category. I know almost nothing but I've read Luminet's book.

      Cheers.

    20. Re:Black Holes by HuguesT · · Score: 1

      Hello everyone,

      BH have a non-zero temperature, so they emit black body radiation. BB radiation emits at *all* wavelengths, regardless of the temperature, so including visible wavelengths. This is so regardless of the mass of the BH. At the right mass, a BH can emit mainly in the visible part of the spectrum, and so be very visible in all senses of the word.

      I have provided a reference to the "reflected light" claim. Please go read it, or look for "Luminet Black Holes" in Google. Happy reading.

    21. Re:Black Holes by pikine · · Score: 1

      Which is not light emitting.

      If I put you in the outer space, you are not light emitting either. The fact I can see you is because you reflect light either from the sun or the computer screen in front of you.

      That said, isn't it surprising when scientists find out that most objects out there aren't light emitting? Like, dark matter?

      --
      I once had a signature.
  4. Ask them... by vought · · Score: 1, Funny

    If you can see the Xener Diode assembly and the Flux Capacitor.

    1. Re:Ask them... by orospakr · · Score: 1

      You do know that Zener Diodes exist, right? :P

    2. Re:Ask them... by compro01 · · Score: 0

      yes, but to Xener diodes exist? =P

      --
      upon the advice of my lawyer, i have no sig at this time
    3. Re:Ask them... by vought · · Score: 0, Offtopic

      You do know that Zener Diodes exist, right? :P Sure, but you might expect the large hadron colliderists to blink a few times if someone asked to see them.
    4. Re:Ask them... by Professr3 · · Score: 1

      Your Zener diodes. Show me them.

    5. Re:Ask them... by SEWilco · · Score: 0, Offtopic

      If they show you some Zener Diodes, ask whether they have licenses for them or do they have forbidden gaps?

  5. Flux Capacitors by gc8005 · · Score: 5, Funny

    You have *got* to see the flux capacitors! I realize that you're a bit new to physics, but please press hard to see the flux capacitors. Your guide may laugh uneasily - just keep pressing and don't take "No" for an answer. You won't be sorry.

    1. Re:Flux Capacitors by Anonymous Coward · · Score: 1, Funny

      I must advise against asking about the flux capacitors. I tried, and it landed me in a psych ward for 10 years. I'm still waiting for the voices in my head to tell me what was so wrong about just wanting to see the flux capacitors. :'(

    2. Re:Flux Capacitors by Anonymous Coward · · Score: 1, Funny

      The fact you're posting this from a mental ward offers a great explanation of the regular conversation on this site; I'm sure you're not the only one allowed! Who would've thought they'd let crazies read and post on Slashdot?

    3. Re:Flux Capacitors by philspear · · Score: 1

      Stop trying to mislead the guy. You know they don't have those. It would take a nuclear reaction to generate the 1.21 gigawatts of electricity you would need, and you don't just walk into a store and buy plutonium. You'd have to steal it from a Libiyan nationalist or something.

    4. Re:Flux Capacitors by BungaDunga · · Score: 1

      I thought Slashdot itself was a mental ward.

  6. My eyes are fooling me by kylehase · · Score: 0, Redundant

    "Large Hadron Collider" I had to read that line several times.

    --
    You want fun, go home and buy a monkey!
    1. Re:My eyes are fooling me by Anonymous Coward · · Score: 0

      So am I the only one who read that as "small pathetic and impotent flopper"?

  7. Hahaha by Anonymous Coward · · Score: 0

    I am turning to the knowledgeable crowd here at Slashdot ...

    Hahahahaha.... What drugs are you using ?.... I want some of that...mine are not working as good....

    1. Re:Hahaha by aitikin · · Score: 3, Funny

      I am turning to the knowledgeable crowd here at Slashdot ...

      Hahahahaha.... What drugs are you using ?.... I want some of that...mine are not working as good....
      I believe you meant not working as well

      How's that for knowledgeable!?

      *barely dodges flak*
      --
      "Don't meddle in the affairs of a patent dragon, for thou art tasty and good with ketchup." ~ohcrapitssteve
    2. Re:Hahaha by UbuntuDupe · · Score: 0

      For the sake of all native English speakers, and anyone trying to learn English, could we PLEASE all agree to abandon the adjective/adverb distinction? I'm usually a stickler for using them correctly, but I'd much rather we all shift to declaring adjectives "equally usable as adverbs". Er, I mean, "equal usable as adverbs".

      Oh dear...

  8. Must see by gardyloo · · Score: 0, Offtopic

    The faceless, chittering beings who are magicked into existence through the wormholes that thing is going to open up. Maybe you can at least slow them down a little bit so the rest of us have a chance.

          Have fun!

    1. Re:Must see by Barkmullz · · Score: 0, Offtopic

      The faceless, chittering beings who are magicked into existence through the wormholes

      You must certainly be referring to these...


      --
      Ronald said nothing. He flung himself from the room, flung himself upon his horse, and rode madly off in all directions.
    2. Re:Must see by Professr3 · · Score: 1

      Are they being chased by a travelling chest on legs?

    3. Re:Must see by gardyloo · · Score: 0, Offtopic

      I wasn't, but I must say....

                        OMG!!!! PONIES!!!!!!11!1!!111!!!11!!

    4. Re:Must See by rmerry72 · · Score: 1

      Oh, and it's always nice to see the sign saying: "In one of these offices Tim Berners Lee invented the internet ..."

      Didn't Tim invent the HTML browser, and therefore kick started the WWW? Bit different to the Internet. Still, to a lot of people, a few web sites with ads, a search engine and an auction site are all the Internet is.

      --
      We do not inherit the Earth from our parents. We borrow it from our children.
  9. Crowbar by apankrat · · Score: 5, Funny

    Make sure you know where to get one in case of an emergency.

    --
    3.243F6A8885A308D313
    1. Re:Crowbar by plover · · Score: 4, Funny
      They say they'll have cake for the visitors.

      Bring a can of spray paint, just in case.

      --
      John
    2. Re:Crowbar by Anonymous Coward · · Score: 0

      Who needs a crowbar? The only thing you need in any emergency is a towel. I've heard a wet towel can even be used to whip a black hole into submission. Imagine, a black hole at your command!

    3. Re:Crowbar by ajlitt · · Score: 1

      Is there anything in the corner of that towel that's effective against headcrabs?

    4. Re:Crowbar by fractoid · · Score: 1

      Well, the first two corners contain essential vitamins and antidepressants, I'm sure that one of the other two would contain some form of delousing agent...

      --
      Rampant carbon sequestration destroyed the Dinosaurs' tropical paradise. I'm here to help repair the damage.
    5. Re:Crowbar by necro81 · · Score: 1

      That could be counter-productive. Most of the important parts of the LHC use powerful superconductive magnets. The main accelerator ring has 1600 superconducting magnets along its length for steering the proton beams. Most of the experiments have very strong magnetic fields in them to cause deflections on the particles left over from collisions.

      So, if you want to use a crowbar, just be sure it is made of something (more or less) non-magnetic, such as 300-series stainless steel or titanium alloy.

    6. Re:Crowbar by douglips · · Score: 1

      Make sure it's a non-ferrous crowbar.

  10. I ask one thing by Mandovert · · Score: 5, Funny

    Please, don't move carts with odd-looking crystals in teleporting devices.

    1. Re:I ask one thing by Brian+Gordon · · Score: 1

      Oh, everything would probably be fine.. probably.

    2. Re:I ask one thing by MadnessASAP · · Score: 4, Funny

      I have this sudden urge to mail CERN and tell them to prepare for unforeseen consequences.

      --
      I may agree with what you say, but I will defend to the death your right to face the consequences of saying it.
    3. Re:I ask one thing by laejoh · · Score: 1, Funny

      And check your^h^h^h^hfor a fly when entering the teleporting device!

    4. Re:I ask one thing by Brian+Gordon · · Score: 2, Funny

      ..the right email in the, wrong place, can make all the, difference, in the world..

  11. naturally by Andrew823 · · Score: 0

    buying a "real piece of the LHC!" on a key-ring.

    1. Re:naturally by DarkAxi0m · · Score: 3, Funny

      buying a real "Mini black Hole!" on a key-ring. :)

  12. The black hole by Anonymous Coward · · Score: 3, Funny

    See if you can goad the physicists into destroying the universe by creating a black hole. You know you want to.

    1. Re:The black hole by CrazyJim1 · · Score: 1

      There are pretty big black holes out there, and they haven't destroyed the universe yet. Even if they scientists manage to destroy the Solar System, they're still a long way off from destroying the universe.

  13. NY Times article, blackholes?! strange matter?! by Moridineas · · Score: 2, Informative
    Asking a Judge to Save the World, and Maybe a Whole Lot More

    But Walter L. Wagner and Luis Sancho contend that scientists at the European Center for Nuclear Research, or CERN, have played down the chances that the collider could produce, among other horrors, a tiny black hole, which, they say, could eat the Earth. Or it could spit out something called a "strangelet" that would convert our planet to a shrunken dense dead lump of something called "strange matter." Their suit also says CERN has failed to provide an environmental impact statement as required under the National Environmental Policy Act. http://www.nytimes.com/2008/03/29/science/29collider.html?em&ex=1207022400&en=fc4bb1d73347fe4e&ei=5087%0A
    1. Re:NY Times article, blackholes?! strange matter?! by CSMatt · · Score: 3, Funny

      The Large Hadron Collider is designed to fire up protons to energies of seven trillion electron volts before banging them together. Nothing, indeed, will happen in the CERN collider that does not happen 100,000 times a day from cosmic rays in the atmosphere, said Nima Arkani-Hamed, a particle theorist at the Institute for Advanced Study in Princeton. Yes, and it is only by the grace of God that these cosmic rays have not killed us yet.
    2. Re:NY Times article, blackholes?! strange matter?! by Anonymous Coward · · Score: 0

      Don't worry, I don't think the rest of the universe would miss much if we blew up the earth.

      In fact, there are some good arguments to turn the damn thing on, even if you know for certain it's going to destroy the planet.

    3. Re:NY Times article, blackholes?! strange matter?! by Anonymous Coward · · Score: 0

      I just don't get it why NEPA should apply in Geneva, Switzerland, Europe.

    4. Re:NY Times article, blackholes?! strange matter?! by jd · · Score: 2, Informative

      Wear a radiation badge when you next fly international. I'd love to know if passengers or crew are exposed to levels in violation of accepted limits. Since none have obviously mutated into X-Men-like characters, it may be hazardous but it's not world-threatening.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    5. Re:NY Times article, blackholes?! strange matter?! by CSMatt · · Score: 1

      What a shame they didn't mutate. That would be awesome.

    6. Re:NY Times article, blackholes?! strange matter?! by jd · · Score: 1

      It's not on the same timescale, but you can accurately date inorganic objects that have been exposed to cosmic rays, because the material actually does mutate. The isotopes change. It takes a few thousand years, but the only Stones not likely to be around that long seem to have found other methods. It's a useful technique in archaeology and geology when carbon dating isn't possible (no carbon or too old or too young).

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    7. Re:NY Times article, blackholes?! strange matter?! by Provocateur · · Score: 1

      Judge: Is this true?

      Venkman: It's true, sir. This man has *no* dick.

      --
      WARNING: Smartphones have side effects--most of them undocumented.
    8. Re:NY Times article, blackholes?! strange matter?! by Dr.+Cody · · Score: 2, Funny

      Yes, and it is only by the grace of God that these cosmic rays have not killed us yet.
      Well, that's what they taught me back in Kansas...
    9. Re:NY Times article, blackholes?! strange matter?! by somersault · · Score: 0, Flamebait

      In fact, there are some good arguments to turn the damn thing on, even if you know for certain it's going to destroy the planet. The only one I can think of just now is you. Sorry.
      --
      which is totally what she said
  14. Oh! by superdan2k · · Score: 1

    You should definitely go visit the on-staff botanists. There's no plants there, but they're on-staff because they're experts on physics (one of them even "discovered" a magnetic monopole!) and used their skill with identity theft to get themselves on-staff.

    --
    blog |
  15. show me the money by ncohafmuta · · Score: 0

    how about showing us some large hadrons colliding (and maybe a higgs boson), instead of having to wait until august of 2008? or better yet, wait until august 2008..could there be a better date for an open day, that they can actually show us what it can DO rather than just what we started building 10+ years and 2.6 billion francs ago.

  16. Appreciation by Jane+Q.+Public · · Score: 4, Insightful

    I think the most valuable "things" you could see on your visit would be 5 physicists who actually do know enough about the subject to appreciate it, and who could maybe pass a smattering of that knowledge and appreciation on to you. Do not misunderstand me... the fact that you asked at all demonstrates that you value the experience and do not take it lightly. I know people who would give a lot to see what you will see.

    1. Re:Appreciation by EEDAm · · Score: 5, Insightful

      You are right that five physicists who actually know enough about the subject would be an awesome find. But since the poster is asking for guidance on what to see I suspect what would be even more awesome for them is a technically very able physicist who can translate their knowledge into plain english. If there is one thing that would spread the influence of science more than today, it is that rare ability to make it understandable to the general populace.

  17. You should see.. by the+dark+templar · · Score: 1

    Higgs Boson. They say it will appeat at LHC magically.

  18. Large Hadron Collider by oldhack · · Score: 1

    Ask them to put glow-on-dark condoms on them. Make sure post the pics back here.

    --
    Fuck systemd. Fuck Redhat. Fuck Soylent, too. Wait, scratch the last one.
  19. Please... by SeekerDarksteel · · Score: 5, Funny

    The LHC is just a tourist trap. It's like Times Square. You go thinking it's gonna be all fun, then you realize it's just a bunch of bright colors and earth eating black holes, and there's nothing to do there but shop for overpriced bosons you could've picked up for half price at a more nondescript collider.

    --
    The laws of probability forbid it!
    1. Re:Please... by Quiet_Desperation · · Score: 2, Funny

      Ah, but the LHC has the hard to find Higgs Bosons. You can't get those anywhere else at *any* price, although I think Fermilab sells a decent knockoff.

    2. Re:Please... by TeknoHog · · Score: 4, Funny

      there's nothing to do there but shop for overpriced bosons you could've picked up for half price at a more nondescript collider.

      Actually, a lot of bosons are free of charge.

      --
      Escher was the first MC and Giger invented the HR department.
    3. Re:Please... by Alpha+Whisky · · Score: 0

      Well, they say they have the Higgs Boson, but I'll believe it when I see it.

      --
      it's = it is

      its = belonging to it

    4. Re:Please... by houghi · · Score: 1

      All this to sell a A superconducting key ring! I kid you not. It is on the website. It is a scam. A normal keyring works just as fine as a superconducted one.

      --
      Don't fight for your country, if your country does not fight for you.
    5. Re:Please... by Doug+Neal · · Score: 1

      Actually, a lot of bosons are free of charge. Heh. Reminds me of a classic joke... For those who haven't heard it before:

      A neutron walks into a bar.
      Neutron: One beer please
      Barman hands neutron a beer
      Neutron: How much is that?
      Barman: To you? No charge!
    6. Re:Please... by yanyan · · Score: 1

      Who cares about bosons? I want bosoms!!!

    7. Re:Please... by Lxy · · Score: 1

      Does that mean that the LHC has a "7 T-shirts for $10" guy? I would love to own my very own "I visited the LHC and lived to tell about it" T-shirt.

      --

      There is no reasonable defense against an idiot with an agenda
      :wq
    8. Re:Please... by vic.thorn · · Score: 1

      You're right there! I could not even find the damned cat!

  20. I'm sure you were expecting .. by Anonymous Coward · · Score: 3, Funny

    .. Small Hard-on Collider

  21. Bring a lawyer! by Anonymous Coward · · Score: 0

    No, really.

    People are suing trying to shut it down.

  22. Most awesome must-see things by Anonymous Coward · · Score: 0

    How about the Higgs boson?

    1. Re:Most awesome must-see things by lazy+genes · · Score: 1

      The Higgs bison are at Fermi.

  23. Todo's at Large Hadron Collider by Anonymous Coward · · Score: 0

    1. Sneak out of line and Trigger a Resonance Cascade.
    2. Use crowbar to pwn all opposing aliens and crates alike.
    3. Turn the greatest scientific minds into mindless lever turning tools...
    4. Follow the G-Man...

  24. Agreed by Jane+Q.+Public · · Score: 1

    A valuable find indeed.

    1. Re:Agreed by perturbed1 · · Score: 5, Informative

      Well, OK. I can claim to be one... But I will out of own for the Open Day... unfortunately.
      The thing is that at CERN almost everyone is clueful but about "one thing" mostly. It is hard to find someone who has the "large picture"... The ones who do are generally people who have not been working on the LHC for the past 15 years but those who have been working on it since 2-3 years and before that was working at Fermilab or somewhere else like that. Then they can tell you what's new or revolutionary and put things in better perspective.
      Honestly, it looks like the OpenDay will be a mad house. We are expecting at least 40,000 people. The queues are going to be awfully long! I feel like we should have a couple more of these OpenDays to accommodate this huge interest but hey, I am not in the management!! I am just a post-doc!
      That said, I have given lots of tours at CERN already. I have taken at least 400 people underground just this past year. (Only 12 people are allowed to go at a time with one guide... ) I think the well-known things like ATLAS and CMS will be completely and utterly packed. So I would like to point out a rare gem... It's the LHC-b cavern where you can actually see the insides of the experiment which installed before LHC-b was installed and is now decommissioned and sitting nearby. The problem with ATLAS and CMS is that they are "done" -- meaning, the experiments are assembled wholly and therefore, it is hard to see it's guts. But you can see the guts of this decommissioned detector, which is kind of neat. I work for ATLAS and I love ATLAS to pieces but I think to try to see it on Open Day, one would need to be at CERN and queueing at 8am... or earlier.
      If you have never seen a tape reader with robots running around before, the tour to the Computing Center is really cool -- but then again, since there will be no radiation there, you can visit that even after the 1st of May. (1st of May is the date set by the LHC management board to be the last day of public tours to the LHC and experiments. The rest of CERN will still be "visitable" after that.)
      If you can not see ATLAS or CMS on the OpenDay or cant be here on the OpenDay but want to see them, there is a cheat... Most of everyone's requests goes through CERN Visitors Service. And they have a pool of guides but the experiments also have a pool of guides. The visitors service is no longer offering tours as they are completely booked until the 1st of May with their guides. But the experiments might still allow for visitors. The way to increase your chances of getting a private tour to one of the experiments is as follows: Find 11 other people who are interested in seeing the experiment with you and then e-mail the ATLAS or CMS secretariat asking for a tour for 12 people on a April xxth at xx:xx. Then they will forward this request to their pool of guides and someone (like me) might actually give you a tour. We like 12 people tours as this is the maximum we can take down and it is a much better "waste" of our time if the tour group is at maximum number... The e-mails for the secretariats are as follows: atlas.secretariat@cern.ch and cms.secretariat@cern.ch
      Good luck!

    2. Re:Agreed by flibuste · · Score: 0, Offtopic

      Thanks for all the great details. Now, can I have your job?

    3. Re:Agreed by JackHoffman · · Score: 1

      Do you know if visitors are allowed to take pictures (with a tripod, preferably) and show them online?

    4. Re:Agreed by perturbed1 · · Score: 1

      Yes, visitors are allowed to take pictures. Tripod will be a bit tricky as it will be crowded -- but I dont see why not. Everything at CERN is public so yes, you can take whatever photos you like and show them online.

    5. Re:Agreed by Anonymous Coward · · Score: 0

      CMS may be mostly assembled, but it's not "closed" yet. It's in a few parallel, but separated, slices. You can see cross-sections of the inside, which might be helpful to put the whole thing in context.

      -Someone who's down there at least twice a month (and really should get a slashdot account)

  25. I'd go see the Atlas detector.. by gwait · · Score: 4, Interesting

    Standard slashdot response - no one follows the link,
    which shows that it's a large open house event with many activities.
    Anyhoo, the Atlas detector looked very cool in a magazine I read recently (National Geographic?).

    Personally I'd also try to see one of the pulse power supplies that drives the LHC injector kicker magnets, because my father's team designed them.
    http://www.triumf.ca/publications/pub/arch05/pp-05-19.pdf

    Yes you can tell I'm proud of him!

    --
    Bavarian Purity Law of Rice Krispie Squares: Rice Krispies, Marshmallows, Butter, Vanilla.
    1. Re:I'd go see the Atlas detector.. by Anonymous Coward · · Score: 0

      You know, to the untrained eye that PDF would appear to have been auto-generated by this.

  26. What I'd like to see... by Tuoqui · · Score: 4, Funny

    The On switch/button :D

    You can get the answer by repeatedly asking 'What does this button do?'

    --
    09F911029D74E35BD84156C5635688C0
    +2 Troll is Slashdot's way of saying groupthink is confused
    1. Re:What I'd like to see... by jd · · Score: 5, Funny

      Asking is no substitute for experimentation.

      --
      It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    2. Re:What I'd like to see... by Yfrwlf · · Score: 1

      A French fry almost came out my nose.
       
      I'm sure the summary of the basic response you'll get for each button is "it turns it on a little more".
       
      Starting a collider is probably more like having to compile a program just to use it because it wasn't in your distro's repository and there aren't good packaging standards for the OS yet. Or, in the case of Gentoo, the program was in the repository, but you need to figure out how to get the @%$!# thing configured so it'll run properly. Oh no I did-ent! (I secretly love Gentoo. Even though now it's not a secret.)

      --
      Promote true freedom - support standards and interoperability.
  27. Obvious by QuantumFTL · · Score: 1

    What should you see when you visit the LHC? Why not see what everyone else is hoping to see - the Higgs Boson!

    If that doesn't work out, you can ask to see just about any other particle they make around there, there's certainly enough of them. But whatever you do, don't bring up Lexx...

  28. Anyone else read this as "Hardon" by appleguru · · Score: 0, Redundant

    Maybe I just have a sick mind, or maybe it's because I know nothing about the subject.. But I could have sworn the article was talking about "large hardons.." :-)

    1. Re:Anyone else read this as "Hardon" by zombie_striptease · · Score: 1
  29. Friendly extra-dimensional space critters? by joetheappleguy · · Score: 0, Redundant

    Oh wait...We should be able to see those AFTER the thing is turned on.

  30. see the detectors by ruck · · Score: 3, Interesting

    If you get a chance, try to visit the caverns of either of the two main experiments (ATLAS or CMS). I saw CMS while it was still above ground (it was assembled there first, unlike ATLAS), and it was a sight to behold. ATLAS is probably even more impressive and maybe more convenient since it's at the main site. Aside from that, I'd try to get a peek at the computer center and take in some of the general lectures.
     
    Have fun!

    1. Re:see the detectors by flogistic · · Score: 3, Informative

      I went to LHC on a visit (school field trip by all standards) just last week and there's quite a lot to see indeed. I would also recommend the detectors especially since they're probably the most important part of the whole experiment and they also include a visit of the actual LHC tunnel. The two sites I would recommend are those in Meyrin where the main campus is (their cafeteria is pretty decent as well) and where the ATLAS experiment is located. While it may be quite impressive to see it, ATLAS is unfortunately closed so besides tons of cable and the external muon chambers you won't get to see much of the inner workings. However, most of the conferences seem to be concentrated around the campus area. There's also the Microcosm exhibit which, while somewhat simple, will probably be entertaining if you don't have a lot of experience with physics (especially the experimental setups). However, you must go see the CMS experiment at the Cessy site just because it's still open (well, it was last Wednesday) so you get to see the actual interior of the detector. Also, I think CMS is simpler to understand just because it's got a simpler setup than ATLAS. Only problem is Cessy is somewhat far from the main campus (not to mention it's in another country), but they will probably have some shuttles (not the "space" type) around for this. If you still have time, ALICE is probably interesting as well and it's located at the Crozet site. But you should have your schedule full with the two main detectors.

    2. Re:see the detectors by dvandok · · Score: 1

      I'm a real ATLAS fan... but it may be a bit disappointing. The experiment is nearly finished, and pretty much fills the entire cave. That means that you are not going to get a good feel for how big this thing really is: from whatever angle, you are standing too close.

      If you are into computers, the computer centre where all the data is collected and distributed to other centres all over the world must be impressive.

      --Dennis

    3. Re:see the detectors by Anonymous Coward · · Score: 0

      Definitely the storage array; ATLAS is going to generate "An insane amount of data" in a world where "A lot of data" is defined as "a truck full of tape"; a standard that has sort of kept up.

    4. Re:see the detectors by Anonymous Coward · · Score: 0

      Definately see the ATLAS experiment. Its on the main site so its easy to get to. I saw it on Thursday and was shocked at the scale of everything. Now is the last chance to see it before the LHC is turned on in May (fingers crossed) and the whole cavern is radioactive.

    5. Re:see the detectors by costing · · Score: 1

      The computing center is impressive, if only for 5 minutes :) While you must also go to see the experiments, prepare yourself to be a bit disappointed. Since most of the electronics is installed you don't get to have a full perspective of how big they are any more.

    6. Re:see the detectors by Anonymous Coward · · Score: 0

      Ask if you can play Crysis on the computer centre.

    7. Re:see the detectors by perturbed1 · · Score: 1

      Also, I think CMS is simpler to understand just because it's got a simpler setup than ATLAS. You *just* made my day... I am forwarding this now to all my CMS buddies.. I dont think they will like to think that they have a simpler setup than ATLAS... :)

    8. Re:see the detectors by perturbed1 · · Score: 1

      Err... No, no.. The whole cavern wont be radioactive! Actually, we dont have any "normal radioactive materials" but yes, there is radiation when the beam is on. The beam will be on sometime in July. But we will activate the biometic sensors and other precautionary measures at the LHC doors starting in May to debug them in a timely fashion before July so that's why we cant have any visitors after the 1st of May. When the beam is on, yes, there is some substantial radiation... But almost all particles stop in the calorimeters -- remember??! (Your tour guide should have said this...) What is "evil" is the material that gets activated -- but that will take a few years. The remaining "evil" is the neutrons that bounce around in the cavern. But the neutron lifetime is 10 minutes so actually, when we have the first beam on and then we turn it off, we can go into the cavern after ~10minutes...

    9. Re:see the detectors by The_Wilschon · · Score: 1

      Do you really expect to activate any non-negligible amount of material? CDF II has been in place for 7 years, and it still has no measurable residual radiation in the cavern when the beam is off.

      --
      SIGSEGV caught, terminating

      wait... not that kind of sig.
    10. Re:see the detectors by Kentari · · Score: 1

      Indeed, try to get underground and see one of the detectors and the accelerator itself. These will be locked down and not opened for public soon after the Open Day. Unline LEP which was still accessible during periods of inactivity. I gathered this was due to radiation induced by the bombardment of high energy particles.

      You should be able to visit the above ground parts later on. Prepare yourself with some basic knowledge about particle physics, the LHC and CERN so you don't have to waste time with that then!

      I had the luck to visit CERN last Saturday. We got a very interesting and educational lecture. Then a tour through the permanent exhibition, which is pretty cool with scale models of the detectors and some legacy detectors. The cream on the cake however was going down to CMS. First you get to see the simply huge assembly hall with some equally huge hardware (the crane to lift the 2000+ ton CMS parts down is already dissambled but still on site) and a little exhibition about the technology of the CMS. Finally you go down to the one of the great cathedrals of modern science. While not as big as ATLAS it is still HUGE: the size and complexity are baffling. The associated facilities (cryogenics, computer centre, BIG helium tanks, ....) are impressive as well.

      If you manage to go: Enjoy
      If you don't: Try harder...

      PS. If you want to take pictures, I recommend to bring a tripod along. A flash is simply unable to help you in that cavern...
      PPS. If you played Half Life too much, like me, you can get some flash backs...

    11. Re:see the detectors by perturbed1 · · Score: 1

      The short answer is yes. But the longer answer is well, it depends... on things like luminosity and how good the LHC is on steering the beam. (ie. if it happens to dump the beam in our end-cap calorimeter, well... hmm... ) The beam halo for the LHC is significantly bigger -- and the design luminosity is 10^4 higher than the one at Fermilab. But I think there will be none until we get to design luminosity... but chances are that we wont there for another 2 years. Once we are there, I would try to keep out of the end-cap areas...

      One number I like quoting is that our inner silicon tracker will get 10^10 chest X-ray equivalent amount of radiation per year at design luminosity. So, yes, after 10 years of operation, I would not want to look at it for extended periods of time.

    12. Re:see the detectors by Sehnsucht · · Score: 1

      What is this inner silicon tracker? Are you saying after 10 years, it would be potentially dangerously radioactive?

    13. Re:see the detectors by perturbed1 · · Score: 1

      Take a look at the
      It is the layer of the ATLAS detector that is closest to the interaction point where collisions happen. The first layer (cylinderical) only 5 cm away.
      As for the radioactivity being "potentially dangerous" -- well, I would not want to ingest any of it or sleep next to it, if that's what you mean... But actually no, we will be able to take the detector out and replace it if needed. Remember that exposure is what counts and that depends on distance, as well as how long you have been exposed to it. So in this case, the answer is that given what we have to do with it, it is not dangerous.

  31. LHC visit by emeraldcity · · Score: 1, Informative

    At the SLAC you can walk the length and they have an observation room exactly where the high speed particles will collide. You will want to see that part, where the sceintists will observe and whatever else you can learn. Hope to hear about your visit-maybe you'll see the Higgs or be able to visualize a magnetic field (like around when a lightning bolt strikes)-protected ofcourse! From the pictures, it must be an overwhelmingly awesome personal experience size-wise. (And a few days ago I was in awe seeing, again, how grand the Roman Statues are currently in the US on loan:))

  32. Other must-sees by jd · · Score: 4, Funny
    • A Type 40 police box
    • Sub-ether electronic thumb (handy for escaping exploding planets)
    • Their back issues of 1001 more things to explode with magnets
    --
    It's a small world and it smells funny; I'd buy another if it wasn't for the money; Take back what I paid (SoM)
    1. Re:Other must-sees by justkeeper · · Score: 2, Funny

      And don't forget your towel......

    2. Re:Other must-sees by Anonymous Coward · · Score: 0

      Oooh, see if they'll let you see the Oscillation Overthruster as well. (After all it's your tax dollars at work, Monkey Boy!)

  33. The end of the world! by mr_tenor · · Score: 0, Redundant

    The builders of the world's biggest particle collider are being sued in federal court over fears that the experiment might create globe-gobbling black holes or never-before-seen strains of matter that would destroy the planet.

    http://cosmiclog.msnbc.msn.com/archive/2008/03/27/823924.aspx

  34. For the WoW fans... by dziman · · Score: 0, Troll

    Light's Hope Chapel?

  35. Placebos by logicnazi · · Score: 1

    I'm always amused by the idea of going and seeing scientific exhibits in person. Especially if you have no technical knowledge of them. I mean it's not like it really should be any better than just reading about it on wikipedia or the discovery channel but nevertheless I often find it rewarding.

    So I've done a bit of thinking about this and my conclusion is that it's a combination of placebo effect and the presence of knowledgeable scientists who are good public speakers. In other words we could tell you any 5 things and so long as you really believed us it would make those worth seeing. True, it's not quite that simple. Some things simply provide more to stare at than others, but that's a large part of the effect.

    --

    If you liked this thought maybe you would find my blog nice too:

    1. Re:Placebos by Urkki · · Score: 1

      I'm always amused by the idea of going and seeing scientific exhibits in person. Especially if you have no technical knowledge of them.I mean it's not like it really should be any better than just reading about it on wikipedia or the discovery channel but nevertheless I often find it rewarding. Shouldn't the same apply to, say, the Grand Canyon (unless you're a geologist) or the Great Wall of China (unless you're a historian or a construction engineer)?
    2. Re:Placebos by qopax · · Score: 1

      It's probably easier to tell how a wall works as opposed to the Hadron Collider...

      --
      I pwn this comment. "The Fine Print" says so.
  36. Come and see by Utopia+Tree · · Score: 1

    I'd say black holes, but you can't really see that can you? But you'll 'experience' it.

    1. Re:Come and see by lawrenlives · · Score: 1

      You can see the apocalypse, if you look real fast!

      --
      Frankly, I prefer the company of nitwits.
  37. Go see the detectors by joshamania · · Score: 2, Interesting

    Go see the ATLAS detector. The detectors are one of the coolest parts at Fermi's accelerator imho.

  38. American physicists in SSC t-shirts by FeldOfBuzztown · · Score: 1
  39. A serious answer by confused+one · · Score: 4, Informative

    If you have any interest at all in the detectors or accelerator, now's the time. Spend your time there; because, you won't be able to "tour" it later. Once it's been running the equipment will become activated (as in radioactive) and the public will no longer be able to tour the underground facilities. There will likely be physicists and technicians on hand who will be happy (excited even) to talk about what they've built.

    you can always go back and look at the computer center, control rooms, or whatever at a future open house event (which I'm certain they'll have regularly, to keep the public interested).

    For what it's worth, I worked as a technician at a U.S. DOE facility

    1. Re:A serious answer by mako1138 · · Score: 1

      Depending on the materials, the activation may not be particularly long-lived. At RHIC, the STAR detector comes out of the hall during cooldown for maintenance. I imagine the detectors at the LHC will need to be serviced at some point as well, or upgraded.

    2. Re:A serious answer by trip11 · · Score: 2, Informative

      I'm a student here working on ATLAS (and I'll be one of the volunteers on the 6th) and I agree with the parent. The two big 'Must sees' are the detectors and the accelerators. The detectors are going to be much more impresive looking. That said, here's my $0.02 ATLAS (point1). This is the biggest detector (and my favorite, though I'm not biased or anything....) but it will also be the most crowded by far. CMS (point5). Almost as big as ATLAS and still damn impressive. It won't be as crowded because it's a lot further away. It will still be packed though I'm sure. ALICE (point2). Smaller detector for heavy ions. My guess is this will be pretty crowded to since St Genis is close to CERN LHCb (point8). Another smaller detector for b quark physics. Between Ferney and Meyrin... no idea if people will go see it. Those are the 4 detectors ranked (in my opinion) in order of coolness. I'd try to go see 2 of them if you can. Look up info on them online (they all have websites), find out which ones you want to visit. You should also try to see the accelerator somewhere. Point 6 would be my recomendation since the beam dump is also located there (this is where the beam is evacuated in case of emergency. When you realize the energy stored in the beam, this becomes pretty impressive). Another thing I recomend is the acelerator chain tour (point1): http://lhc2008.web.cern.ch/LHC2008/OpenDaysE/accelerators.html There are a lot of other things open, but most of them you can still go and visit when the LHC is running (and the crowds aren't there). One last recomendation. I'd start out going to see things out on the ring, then come back to point1 (Meyrin) and explore it with all the rest of your time. That way you should be able to get the most out of it. See you Sunday!

    3. Re:A serious answer by Anonymous Coward · · Score: 0

      Bah, humbug! There'll still be opportunities to check it out later on, too. I was at the DESY in Hamburg and checked out the HERA collider twice already (with ~10 years or so in between), and you can't tell me they never used it between those times.

      I see no reason why the same shouldn't - in principle - be true at the CERN. Sure, they might *decide* not to open it again, but that's another story.

    4. Re:A serious answer by confused+one · · Score: 1

      Your right that the activated materials are short lived, typically with half-lives on the order of hours. At JLab (which is a very low energy facility compared to some others) we typically allow a cool-down period of a week or so, after the accelerator has shut down, before we start the serious work on the detector systems. There's very little risk associated with working around the equipment.

      My point was, however, that once beam has been introduced into the end station, we no longer allowed people into the halls during the open houses. The only people who can go into the end stations, accelerator tunnels, and above ground facilities where we work on the equipment are staff, users, and escorted VIP guests. So, if you are going to go during an open house, if the CERN open house runs anything like the JLab open house, now is your last chance to get a good look at the equipment.

    5. Re:A serious answer by confused+one · · Score: 1

      A reply to myself, I had further insight...

      This lack of willingness to allow mass numbers of visitors in during the open houses might be more "political" than anything else. You could certainly rope off safe areas where you could run guided tours. Unfortunately, here in the U.S., the general public still has some irrational fears concerning anything "nuclear" or "radioactive" and you can't help but be exposed to the signage, placards, warning labels, etc.

      Maybe your in a better position in Europe?

    6. Re:A serious answer by mako1138 · · Score: 1

      Well, I'm at RHIC, which is at Brookhaven, in New York. Perhaps it has more to do with our schedule. RHIC is in shutdown during the summer, which is when all the BNL open house stuff happens. During the Run, certainly everyone out at the ring has to be authorized.

  40. Compulsory T-Shirt by adamkennedy · · Score: 4, Funny

    "I visited the Large Hadron Collider and all I got was this radioactive T-Shirt"

    1. Re:Compulsory T-Shirt by Iamthecheese · · Score: 2, Funny

      "Scientists do it in tubes!"

      --
      If video games influenced behavior the Pac Man generation would be eating pills and running away from their problems.
    2. Re:Compulsory T-Shirt by auric_dude · · Score: 2, Funny

      I collided with the largest hardon and poked my eye out.

  41. Thier new advert campaign. by Digestromath · · Score: 1

    Come for the groundbreaking experiments in high energy physics, stay for the wings and wet lab coat contests! Remember, Tuesdays are 'Name That Particle' night!

  42. Watch the beam dump. by viking80 · · Score: 1

    The energy of the beam is 725 MJ, and the magnetic field is 725 MJ. This is the same as 160kg and 2.5 tons of TNT.

    I would recommend to be in the vicinity of the "beam dump" when the beam for on of about a million failsafe conditions is aimed there.

    If nothing happens, you can probably induce a beamdump in any of a thousand ways. Use your imagination, or just look for big red buttons.

    --
    don't cut it off www.mgmbill.org
    1. Re:Watch the beam dump. by bucky0 · · Score: 1

      The magnetic field is 725 Mega Joules? What does that mean?

      --

      -Bucky
    2. Re:Watch the beam dump. by viking80 · · Score: 1

      IT means that the energy stored as a magnetic field is 725 MJ

      See http://scienceworld.wolfram.com/physics/MagneticFieldEnergyDensity.html

      --
      don't cut it off www.mgmbill.org
    3. Re:Watch the beam dump. by viking80 · · Score: 1

      It was of meant to read 725 MJ, and the magnetic field is 10 GJ.

      --
      don't cut it off www.mgmbill.org
  43. Ask why they call it "Large" by Eternal+Vigilance · · Score: 1

    I mean, Jeebus, anyone can see that it's large.

    "Oh, excuse me, Dr. Physicist, I wouldn't have known if you hadn't told me." Stupid physicists.

    (Though perhaps it's that physicists contracted out to the folks who classify shrimp...next up, the "Jumbo Hadron.")


    "Mmmm...Jumbo Hadrons"

    1. Re:Ask why they call it "Large" by Fumus · · Score: 1

      Why? That's easy. Scientists like to brag about how big their hardon is.

  44. Simple by antifoidulus · · Score: 2, Funny

    ask for the keys and take it for a test collide!

    Thank you, thank you, I'll be here all week, try the fish!

  45. You know you're a nerd when .. by quarrel · · Score: 1

    you ask for advice on how to fill 10 hours at the Large Hadron Collider!

    --Q

  46. Meet the people by FoolsGold · · Score: 1

    I hear the primary research assistant for the task, Gordon Freeman, will be at the event. Apparently he's the guy they picked to throw the switch that will start the collider. Make sure to take your camera!

    (and a crowbar, just in case)

  47. Things to check out by mlassnig · · Score: 5, Informative

    Since I work here.... I might give a few clues:

    - before you do anything, check the Microcosm museum in the reception building. This one will explain a lot what's happening.
    - this one is a must: be sure to make a trip to either the ATLAS or CMS cavern (those are the two bigger detectors attached to the LHC)
    - the ATLAS control room
    - the LHC control room
    - the computing centre in the IT building

    - and if you have time, stop by for a tea in building 40 :-)

    1. Re:Things to check out by Provocateur · · Score: 1

      Check the fridge. Maybe you might catch a beer-drinking scientist onsite.

      --
      WARNING: Smartphones have side effects--most of them undocumented.
    2. Re:Things to check out by qc_dk · · Score: 2, Informative

      >the ATLAS control room
      >and if you have time, stop by for a tea in building 40 :-)

      Blatant ATLAS propaganda. ;-P
      No no, you should come to the computing centre, or CMS.

      In all seriousness I agree with my colleague above. Microcosm is worth a visit, but the must-see is one of the caverns(ATLAS,CMS).
      They are not quite so impressive now that they have been filled completely with detectors, but still very interesting. As mentioned
      in another post above the control rooms and computer centre will probably stay open to the public in some fashion, but once the
      LHC starts, the caverns will become radioactive. I can't remember the official cool down numbers but it is on the order of months.

      If they are fully booked (and i expect they are) I would try one of the other experiments. Like Isolde, compass or the anti-proton
      collector.

      I also think that just seeing the site is an interesting experience. (It is very different from Dan Brown's description for example)

      disclaimer: I worked at cern(but not with ATLAS).

    3. Re:Things to check out by Ambix · · Score: 1

      Thank you for actually answering the question. I'll be there for the open house and am looking forward to it. And I'll absolutly get tea in building 40.

    4. Re:Things to check out by perturbed1 · · Score: 1

      Hey... when CMS has a control room, I'd like to visit that!!! :P ;) Until then, yes, ATLAS control room rocks!

    5. Re:Things to check out by Garlock · · Score: 0

      Good list. I don't work there but recently got the incredible luck to be invited to a VIP visit of the LHC and a few other things.
      My own personal comments:

      1) While in the "Microcosm" museum, be sure to pay your respects to the first ever WWW server. The NeXt cube used by Tim Berner Lee is exposed there :-)

      2) When you take pictures of the ATLAS experiment, you may want to have a few people in the shot, otherwise it will be hard to tell the scale of that thing. It is really huge.

      3) A word of advice: get there VERY early. Last time CERN had a open-door day, it was packed, and I mean PACKED. Access to the underground tunnels (coolest thing to see) had to be closed early because of the huge lines to get in there. Since this will be the LAST chance to see them (as mentioned before, they'll be quite radio-active once the LHC is turned on) I think it's a fair bet that they'll be even more popular this time.

    6. Re:Things to check out by mlassnig · · Score: 1

      >Blatant ATLAS propaganda. ;-P

      yes, it is :-)

      >If they are fully booked (and i expect they are) I would try one of the other experiments. Like Isolde, compass or the anti-proton
      collector.

      as far as I understand you cannot book in advance. you go there, get a number, and wait until it's your group's turn

    7. Re:Things to check out by toxygen01 · · Score: 0

      well, I'll be there and wouldn't mind one tea with a slashdotter :) what do you say?

    8. Re:Things to check out by mlassnig · · Score: 1

      Member's only open doors was today :-)

      Some impressions:

      http://www.flickr.com/photos/mlassnig/sets/72157604400276543/

  48. Must See by Anonymous Coward · · Score: 2, Informative

    I took part in their summer student programme last year and during that time we've been visiting all of the places that you can go visit now during the open day. My recommendations are:
    If you're interested in detectors you have enough time to visit at least two of the four major experiments. CMS is a bit far away, it takes you some 20 minutes by bus to go there, ALICE and LHCb are closer and ATLAS is just across the road opposite the main entrance. I would recommend ALICE and ATLAS - ATLAS is, just like CMS, a multi-purpose detector looking for everything that's interesting in the unknown lands of energies accessible at the LHC whereas ALICE aims to study quark-gluon plasma produced in the collisions of heavy nuclei. Make sure to visit ATLAS last - if you thought the other detectors were huge ATLAS will blow you away!
    Don't count on it that you get a peak inside the actual LHC tunnel while you are visiting the detectors. I don't know why but all of our guides were quite reluctant to just pull back the curtains so that we could have a look. Maybe there's a designated visit during the open day ...
    For lunch go to restaurant 1 and enjoy the atmosphere there. It was one of our favourite places to hang out and have a fruit salad. It is always told that many ideas for experiments and theories first came up over a cup of coffee there, it's an exciting place and your chance to chat with some of the physicists there.
    There's also a kind of graveyard for old parts of experiments close to the reception. I found the Gargamelle bubble chamber most impressive, a massive biest.
    Last but not least try to visit the accelerator chain (LINAC, PS) - it's quite interesting to see the bottle containing the hydrogen that goes into the different accelerators and will eventually be accelerated to these mind-boggling energies.
    Wherever you go and whatever you see, have a fun day at CERN - i sure envy you.
        Kilian

    PS: Oh, and it's always nice to see the sign saying: "In one of these offices Tim Berners Lee invented the internet ..." - it's somewhere in building 2 if I remember correctly.

  49. GET A KEY RING! by Provocateur · · Score: 1

    It's there on their home page. Later, if you read in the papers, that some experiment produced negative results, you let out a sinister laugh, while twirling the keyring with your pinky, and say out loud, Not without this you won't! Fools!

    --
    WARNING: Smartphones have side effects--most of them undocumented.
  50. Things to ask about by Anonymous Coward · · Score: 0

    Ask loudly if it's true that "if it produces a black hole then we would all be dead before we know it?"

    You might also ask if you could see a Hadron.

  51. Comment thread for nerds. Some stuff matters. by gilgoomesh · · Score: 2, Insightful

    How sad that someone asks a questions about one of the coolest science projects in the world and the Slashdot community only wants to vote up the "Funny" replies. Poor form. Stop being so guarded and show us your geek. Seriously, how could you miss: "The levitating scooter, which will take volunteers for a ride suspended in the air" http://lhc2008.web.cern.ch/LHC2008/OpenDaysE/super.html

    1. Re:Comment thread for nerds. Some stuff matters. by ribasushi · · Score: 1

      Indeed too sad... As a matter of fact it was slashdot where I found about the open day in the first place. Since I can not vote for some reason (probably my account is too new) I will list the winning answers so far:

      http://ask.slashdot.org/comments.pl?sid=504838&cid=22918838
      http://ask.slashdot.org/comments.pl?sid=504838&cid=22918714
      http://ask.slashdot.org/comments.pl?sid=504838&cid=22918366
      http://ask.slashdot.org/comments.pl?sid=504838&cid=22918558
      http://ask.slashdot.org/comments.pl?sid=504838&cid=22918836
      http://ask.slashdot.org/comments.pl?sid=504838&cid=22919208

      I appreciate each and every single one of you, exactly the stuff I wanted to hear! As far as the sad part - I might have missed a few comments, but even if we assume there were 10 serious ones, that's close to -11dB SNR at 120 comments and counting (taking the power of every comment to be equal). Shame on you geeks!

  52. T-Shirt by taff^2 · · Score: 1

    "I went to the LHC and all I got was a third arm, a tail, six sets of testicles and radiation poisoning!"

    --
    Karma: Bad. (As in Good?)
  53. Seriously by Sub33 · · Score: 1

    I would say you have to see ATLAS, it is simply awe inspiring and of course get the Higgs event T-Shirt which I hope is not radioactive.

  54. best thing to see there? by martin-boundary · · Score: 1

    Christmas Jones. I've been told she works there?

  55. See if you can find... by Eth1csGrad1ent · · Score: 2, Funny

    ...THE BUTTON (TM) (C) 2008. All Rights Reserved. Patent Pending. You know the one. Big, Red, Round. Has a PostIt note on it reading "DO NOT PUSH THIS". I mean...cmon...Its just gotta be there somewhere! Its just gotta..

  56. The great thing about sightseeing at the LHC by Centurix · · Score: 1

    Is that once they switch it on, you don't have to be there to see what it does...

    --
    Task Mangler
  57. Recycling? by Msdose · · Score: 3, Funny

    Ask them if the big bang was caused by an experiment to discover the Higg's boson.
    Ask them if this is the last chance to perform this experiment before physicists realize that it will cause a big bang and inflationary event which will recycle the present universe.
    Ask them if this is the same experiment that was done 20 billion light years away and that put on a show called the Star of Bethlehem 2000 years ago.
    Ask them if the only proof that they will cause a big bang is that there cannot be any proof until the experiment is performed. (See also 'The Hound of the Baskervilles')
    Ask them if it is necessary to do the experiment because we've been doing it for infinity and if we don't the universe will fade away forever.
    Ask them if we have to do it because if we don't some other nearby civilization will beat us to it and we'll eat their dust.

  58. Nicely Formatted by trip11 · · Score: 4, Informative
    Once again, with formating (really need to hit that preview button)...

    I'm a student here working on ATLAS (and I'll be one of the volunteers on the 6th) and I agree with the parent. The two big 'Must sees' are the detectors and the accelerators. The detectors are going to be much more impresive looking. That said, here's my $0.02

    ATLAS (point1). This is the biggest detector (and my favorite, though I'm not biased or anything....) but it will also be the most crowded by far.
    CMS (point5). Almost as big as ATLAS and still damn impressive. It won't be as crowded because it's a lot further away. It will still be packed though I'm sure.
    ALICE (point2). Smaller detector for heavy ions. My guess is this will be pretty crowded to since St Genis is close to CERN
    LHCb (point8). Another smaller detector for b quark physics. Between Ferney and Meyrin... no idea if people will go see it.

    Those are the 4 detectors ranked (in my opinion) in order of coolness. I'd try to go see 2 of them if you can. Look up info on them online (they all have websites), find out which ones you want to visit. You should also try to see the accelerator somewhere. Point 6 would be my recomendation since the beam dump is also located there (this is where the beam is evacuated in case of emergency. When you realize the energy stored in the beam, this becomes pretty impressive).

    Another thing I recomend is the acelerator chain tour (point1):
    http://lhc2008.web.cern.ch/LHC2008/OpenDaysE/accelerators.html

    There are a lot of other things open, but most of them you can still go and visit when the LHC is running (and the crowds aren't there). One last recomendation. I'd start out going to see things out on the ring, then come back to point1 (Meyrin) and explore it with all the rest of your time. That way you should be able to get the most out of it. See you Sunday!

    1. Re:Nicely Formatted by Yoweigh116 · · Score: 1

      Mod up the parent post, please.

  59. observe some whinny money grubbing "scientists" by Anonymous Coward · · Score: 0

    You can see where peoples assets are being wasted on their behalf by whiny scientists who deserve to have a living at someone elses expense!

    "oooh but "we" NEED blue sky research. Who knows what fabulous things we might discover!" Pay for it your self then you theiving socialist and get your hands out of my pockets.

    1. Re:observe some whinny money grubbing "scientists" by Anonymous Coward · · Score: 0

      Fuck you, asshole. I'll take as much money from you as I want.

  60. motivational poster by Anonymous Coward · · Score: 1, Informative
  61. Seriously, heed this advice... by Luxusleben · · Score: 1

    It's all coming together, even (Dr.?) Kleiner will be there.
    http://lhc2008.web.cern.ch/LHC2008/OpenDaysE/point6.htmlhttp://lhc2008.web.cern.ch/LHC2008/OpenDaysE/point6.html
    ;)

  62. Go for LHC P1: Meyrin by Theorem+Futile · · Score: 1

    I say go for "LHC P1: Meyrin" which seems to include a visit of ATLAS. My opinion is ATLAS is a must-see. But don't go there is you have a pacemaker.

    --
    .oO0(?)
  63. Am I in trouble ... by giorgist · · Score: 2, Funny

    I thought a superconducting key ring would be a cool souvenir.
    They don't sell it over the net.
    So I tried eBay.

    No luck, but there was some superconducting parafinelia for some $10K. So I asked

    How much to ship to Iran

    G

  64. Cafeteria & Mont Blanc by weg · · Score: 1

    The CERN has a very nice cafeteria.

    Also have a look at Mont Blanc, which you can see when you're in front of the LHC building. It's a very nice view.

    --
    Georg
  65. That's "refract" by Nimey · · Score: 1

    because they bend the light via gravitational lensing. If a black hole is directly between you and a light source (like a distant galaxy) you see what's called an Einstein ring caused by the lensing.

    --
    Hail Eris, full of mischief...

    E pluribus sanguinem
  66. Things to See by Anonymous Coward · · Score: 0

    1.If you can still see ATLAS go and see it and get a sense of the size of the experiment chambers.
    2.Look down the Hole they lowered the equipment through.
    3.Eat at Restaurant 2, the daily grill is awesome
    4.Watch the road for fast campus vans and bikes
    5.Go into the exhibit under the gift shop to learn about the LHC project.

  67. Be Prepared! by The+Angry+Mick · · Score: 1
    --

    I'm not tense. I'm just terribly, terribly, alert.

  68. Must see by Technopaladin · · Score: 1

    1. Ask where the armory is...If something goes horribly wrong..thats a KEY location. 2. Ask to Junction Box H3479-943. I made that up but would be cool if they had one. 3. Ask to see the hidden gun implacements. 4. Ask if it explodes what is the minimum safe distance. 4b. Ask where self Destruction button is? 5. FInd out what local towns or villages offer the best collection of heros to survive the resultant transdimensional crossover. (Local sports figures, children that are too cute die, stay away from sleazy girls and politicians.) 6. Finally ask where the gift shop is and do they have a minature working version.

  69. Nothing but the Net by sweetser · · Score: 1

    Hello:

    I am betting there will be no Higgs and no superpartners. When gravity is unified with EM as I have done, there will be no need for the Higgs boson, as mass itself does the job, thank you very much. Call my bluff, see my latest YouTube video with a nasty amount of math, deriving the good old Maxwell equations along with ones for gravity: http://www.youtube.com/watch?v=P9TUqUXGgpE

    Doug

    --
    Working on new views of old physics at http://VisualPhysics.org
  70. the ring & the halls. by Anonymous Coward · · Score: 0

    In the hall with the ring. Surface buildings can be accessed during operation (esp. if you have contacts or make contacts). The experimental control rooms
    likewise. The interaction/detector halls and the ring will be harder to get into (locked during running; possibly hot and restricted afterward).

  71. Must See: Destroy the Universe/Earth button. by jameskojiro · · Score: 1

    They have a destory the Earth/Universe button which is located right next to the Staples Easy button, Destroying the Earth, "That was Easy"!

    --
    Tsukasa: All I really want, is to be left alone...
  72. Big buttons by GlobalEcho · · Score: 1

    If they have a sense of humor over there, they probably have set up a few big red buttons at eye level for both children and adults. Unlabeled. And connected to loud, scary sirens.

  73. Mod Parent Up, Please by billstewart · · Score: 1

    While personally I'd be more interested in seeing the Oscillation Overthruster, the fnords, and the white hole that'll be created after they fire the thing up, I'd say than an article by somebody who's actually seen the LHC really does deserve some Mod Informative points.

    --

    Bill Stewart
    New Fast-Compression-only CPR http://preview.tinyurl.com/dy575ks
    1. Re:Mod Parent Up, Please by Anonymous Coward · · Score: 0
  74. What I'd like to see by whoisisis · · Score: 1

    Hi. I am a physics student. What I'd love
    to see is the LHC control room.
    At our department, we have a small particle accelerator in the basement.
    The controls there is some sight. It's especially interesting
    how the local physicists have made (sometimes rather homebrewn looking) equipment for the control computers
    in order to control the beam of electrons. I wonder how it must look at the LHC.

    Also, try to get a look at the place where they inject particles
    into the ring.

  75. Which Day is the End of the World? by cc_pirate · · Score: 1

    I know that most think it extremely unlikely, but I for one would like some advance notice of when they are going to crank this thing up for real so that I can at least make sure I live the few days before that to the fullest.

    Ever wondered what it would be like if they generated a large, non-disappearing black hole?

    Would the world die?

    --

    "There are laws that enslave men, and laws that set them free. " - Sean Connery as King Arthur

  76. frivolous lawsuit by Anonymous Coward · · Score: 0

    I'm posting this from my phone so I apologize for being an AC, though I'd suggest focusing on helping them out in their upcoming lawsuit. I'm sure when it comes to separating fact from fiction they'll do fine, however they could certainly use some help on the pr side as the case (and future research) will likely depend heavily upon public opinion of the safety measures in place and the forknowledge of their research in terms of the newest breed of global warming hippy bs, I guess everyone freezing their asses off in spring made them decide to go with a topic the general public wouldn't know much about :)

  77. The first web page ever written. by chris_sawtell · · Score: 1

    But I fear it got annihilated by one of those pesky little black holes they make there.

  78. Can Chuck save us? by SWFalken · · Score: 1

    Is Chuck Norris going to be there when they fire this thing up. Chuck is the only thing that can stop a black hole, because nothing sucks Chuck Norris but Chuck Norris.

  79. DOn't GO Near THE Colliders! by Anonymous Coward · · Score: 0

    It's an alien plot to infect us with a nano-parasite. Only the energies found in the ATLAS control room and the LHC control room are powerful enough to make it work.

    Just say NO!

    *grin*

  80. TY Doc by Anonymous Coward · · Score: 0

    I was looking for those numbers.