Particle Accelerator


by ATCG
Tags: accelerator, particle
ATCG
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#1
Sep25-03, 06:05 AM
P: 17
I was wondering how to build a particle accelerator at home. If it is possible, please tell me how. Thank You
-ATCG
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jcsd
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#2
Sep25-03, 07:15 AM
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No it isn't, partricle accelrators are huge devices which are miles long/have a radius of miles and use extremely powerful magnets in order to get the particles up to the required speed.
Nereid
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#3
Sep25-03, 09:25 AM
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I was wondering how to build a particle accelerator at home
Actually, you probably have several in your house right now ... your computer monitor (unless it's a liquid crystal flat screen), your TV set (again, unless it's a flat panel liquid crystal one), your fluorescent light tubes, ...

The standard cathode ray tube is an electron accelerator (and electrons are particles).

What sort of particles do you wish to accelerate? To what sorts of energies?

chroot
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#4
Sep25-03, 01:14 PM
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Particle Accelerator


You can build a small cyclotron in your home with nothing more than a modest vacuum pump, some sort of cylindrical vacuum flask, a couple of carefully manufacturered D-shaped electrodes, and some simple electronics. The whole thing could be no larger than a few feet in diameter.

The easiest thing to do is to evacuate the flask and use the particles (mostly nitrogen atoms) in the rarefied gas left over as projectiles.

The energies won't be high, but you can certainly do some simple experiments with your crude nitrogen beam.

- Warren
ATCG
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#5
Sep25-03, 02:33 PM
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I would be trying to create anti-matter
jcsd
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#6
Sep25-03, 02:41 PM
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What kind of anti-matter, you can create anti-neutrinos from beta-decay (In the UK at least you usually need a license to handle any radioactive materials), creating any other kind of antimatter is going to be more difficult esp. anti-baryons.
Nereid
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#7
Sep25-03, 03:47 PM
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You could always build a cloud chamber, and watch the cosmic rays go through it. Every so often you'll see some anti-matter ...
russ_watters
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#8
Sep26-03, 09:18 AM
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Originally posted by ATCG
I would be trying to create anti-matter
Your warp engines running low on gas?

I read once that anti-matter is th most expensive "substance" in the world.
Nereid
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Sep26-03, 10:33 AM
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Russ said:
I read once that anti-matter is the most expensive "substance" in the world
More likely to be super-heavy elements (Lr, Rf, ... through to Uuo (element 118))
chroot
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#10
Sep26-03, 02:10 PM
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Originally posted by ATCG
I would be trying to create anti-matter
Given the energies needed to perform this, I can pretty convincingly say you're not going to get it to happen on your tabletop. And even if you did, how would you use it? You need some pretty sophisticated machinery to separate and store antimatter.

You may be interested to know that some kinds of targets, such as lead, are commonly used to "convert" photons into particle-antiparticle pairs.

- Warren
pmb
#11
Sep26-03, 04:12 PM
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Originally posted by jcsd
No it isn't, partricle accelrators are huge devices which are miles long/have a radius of miles and use extremely powerful magnets in order to get the particles up to the required speed.
That's incorrect. People have actually built particle accelerators at home. From - http://www.fnal.gov/pub/inquiring/qu...icle_accl.html
And there is a case of a real person who built a particle accelerator in his basement when he was a teenager. He has since graduated in physics from the University of Chicago and (I'm pretty sure) is in graduate school at the University of Michigan. He put together the same elements I talked about earlier. The hard part was getting the vacuum system, which he got by scrounging around in Army surplus depots and junk yards. So a home made particle accelerator has been made in real life, not just in storybooks.
I believe he's talking about this person
http://www-personal.umich.edu/~mrniell/cyc2.html


A good place to start would be to look at how the first cyclotron was made. See - "The Production of High Speed Light Ions Without the Use of High Voltages," Ernest O. Lawrence and M. Stanley Livingston, University of California. February 1932 --
http://prola.aps.org/abstract/PR/v40/i1/p19_1

For an image of a table-top accelerator see
http://www.aip.org/history/lawrence/...e/first-11.htm

See also -
http://www.aip.org/history/lawrence/first_text.htm
http://www.aps.org/apsnews/0603/060316.html
http://www.lbl.gov/Science-Articles/...rly-years.html
http://www.lbl.gov/nsd/user88/chchist1.html (???)

The first cyclotron could actually be held in your hand
http://www.fnal.gov/pub/inquiring/timeline/15.html
http://www.llnl.gov/llnl/history/eolawrence.html
http://science.howstuffworks.com/atom-smasher2.htm

ATCG - If you build one please keep me informed. I'd love to follow your progress.

Pete
chroot
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#12
Sep26-03, 04:44 PM
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[8)] [8)] [8)] [8)] [8)] [8)]

THAT'S CYCLOTRON BOY!

I remember seeing his (award-winning) science fair project at the 1994 International Science and Engineering Fair in Hamilton, Ontario, Canada!!! My clique of students took quickly to giving him the endearing name of 'cyclotron boy,' and making up stories about his parents forcing him to stay in the basement, subsisting on bread and water, working his fingers to the bone to make his cyclotron.

Talk about a small world!

My only complaint with his entire experiment was that he obfuscated it as much as possible. He didn't just buy a vacuum pump -- no -- he took one apart and stuck all its components on a big piece of plywood, lengthening hoses as necessary, to make it look more imposing. He really did a first-rate job, though -- he was studying mass resonance, I believe, and took some reasonably useful data with his crude apparatus. He certainly did deserve the 1st grand award in physics.

- Warren
ATCG
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#13
Sep26-03, 08:20 PM
P: 17
Could someone link me to a web site the has detailed schematics on how to build a cyclotron or Particle accelerator?

Thanks
-ATCG
pmb
#14
Sep27-03, 07:33 AM
P: n/a
Originally posted by ATCG
Could someone link me to a web site the has detailed schematics on how to build a cyclotron or Particle accelerator?

Thanks
-ATCG
Did you look at this page??
http://www-personal.umich.edu/~mrniell/cyc2.html

Try e-mailing the author/owner of that site and ask him of the blueprints and schematics (one's online are not very legible).

His e-mail address is - mrniell@umich.edu

Pete
bdrell
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#15
Nov19-03, 03:21 AM
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This summer I worked with a Van de Graaff accelerator. We were able to accelerate protons and alpha particles to 2.5 MeV. Basically, it's just a Van de Graaff generator that charges up to about 2x10^6 V and accelerates the particles from a plasma that gets struck by an RF magnetic field. They go through a bunch of equipotential plates, basically round metal plates with holes in their middles that are connected by resistors so that they step down the voltage accumulated on the dome. To keep the dome from sparking over to the outer container, it's pumped down, then filled to low pressure with SF_6. There's a relatively long beam line that's pumped down to high vacuum with a sample chamber. We did some Rutherford Backscattering Spectrometry and some nuclear reaction analysis.

There are also some smaller accelerators. At the University of North Texas, where I was this summer, they have a Cockcroft-Walton accelerator. This one's small enough that it could fit in a relatively large basement. Good luck with the electric bills, though. Accelerators eat power pretty ravenously.

[:))] Just my 2 cents.
SmarterThanGod
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#16
Jan21-04, 06:18 PM
P: 36
Originally posted by chroot
You can build a small cyclotron in your home with nothing more than a modest vacuum pump, some sort of cylindrical vacuum flask, a couple of carefully manufacturered D-shaped electrodes, and some simple electronics. The whole thing could be no larger than a few feet in diameter.

The easiest thing to do is to evacuate the flask and use the particles (mostly nitrogen atoms) in the rarefied gas left over as projectiles.

The energies won't be high, but you can certainly do some simple experiments with your crude nitrogen beam.

- Warren
Can you go into more detail as to materials, production and use? Id appreciate it. Im interested in designing one myself, bu i need more general info
eagleone
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#17
Jan25-04, 10:33 AM
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So what would you do with just a cyclotron (assuming youíll build it, and youíll willing to pay electrical bill for itís el. Magnets, nevertheless Lawrence would be proud on you ;))? You need some detecting equipment, what about that, and what can you really do with homemade cyclotron (you canít achieve energies needed for experiments you would like to conduct anyway)Ö

Thing with that cloud chamber could be interestingÖ has anyone of you built it or saw homemade specimen (at least youíll pass without scary el. bills)Ö

Anyway Iím interested what effects are being used for detections of processes, experiments, globally everything happening in modern hi-energies accelerators?
Cyclotron Boy
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#18
Feb16-04, 09:17 AM
P: 24
I have to admit that this is a pretty bad trolling here, but I just wanted to let Warren know that I am still alive and around. I happened to see this message in the forum, and had to respond. I do not have cyclotron blueprints or schematics. However, I am writing a rather involved book on the subject of designing and building a particle accelerator in your garage or basement. I have quite a bit of stuff down already, and it is not finished. Anyway- it is certainly possible for the advanced tinkerer to create a particle accelerator capable of nuclear interactions. While I cannot design a machine for people, I can provide guidance. So, if someone wants help or advice in designing a machine of their own, please feel free to email me or post questions.

The name "Cyclotron Boy" stuck. It is my /. name, and now my physics forums name. Boy, the science fair brings back memories. Good times, good times.

And the website is Fred's World of Science: Research

-Fred


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