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Author Topic: How does the LHC operate  (Read 2048 times)

Offline syhprum

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How does the LHC operate
« on: 30/09/2010 09:11:06 »
I can find lots of information on the LHC but one matter still puzzles me.
How is arranged that some bunches of Protons rotate in a clockwise direction while others rotate in an anti clockwise direction so that collision's occur.


 

Offline JP

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How does the LHC operate
« Reply #1 on: 30/09/2010 09:59:10 »
Each beam pipe has its own set of magnets, with fields pointing in opposite directions: http://www.scienceinschool.org/2008/issue10/lhchow
 

Offline syhprum

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How does the LHC operate
« Reply #2 on: 30/09/2010 20:06:36 »
I was under the misguided impression that there was only one beam pipe hence my confusion.
 

Offline LeeE

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How does the LHC operate
« Reply #3 on: 01/10/2010 00:31:14 »
Nice article JP.

I particularly liked...

Quote
For the LHC beam, 300 trillion protons are required, but since a single cubic centimetre of hydrogen gas at room temperature contains about 60 million trillion protons, the LHC can be refilled 200 000 times with just one cubic centimetre of gas – and it only needs refilling twice a day!

...fill her up!
 

Offline JP

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How does the LHC operate
« Reply #4 on: 01/10/2010 04:36:54 »
I was confused too, Syphrum.  I'd heard all the popular science accounts of the LHC using powerful magnets, but I always pictured two beam pipes within one giant set of magnets.  Of course, as you say, that wouldn't work!  It took a bit of searching to actually find the schematics and explanation.
 

Offline syhprum

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How does the LHC operate
« Reply #5 on: 01/10/2010 07:19:44 »
That would of course work fine if they used Anti Protons which was one of the assumptions I made at first.
I think the reason for the use of two separate systems of magnets is to make adjustments to the beams so that they actually collide
« Last Edit: 01/10/2010 07:24:04 by syhprum »
 

Offline JP

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How does the LHC operate
« Reply #6 on: 01/10/2010 07:47:19 »
Yeah--I wonder why they're not using antiprotons?  I think the Tevatron at Fermilab is a proton-antiproton collider. 
 

Offline Geezer

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How does the LHC operate
« Reply #7 on: 01/10/2010 08:07:37 »
Yeah--I wonder why they're not using antiprotons?  I think the Tevatron at Fermilab is a proton-antiproton collider. 

I'll give my Auntie Proton a call tomorrow. She lives in Largs. I'll bet she knows.
 

Offline syhprum

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How does the LHC operate
« Reply #8 on: 01/10/2010 10:05:39 »
I believe I know the reason why antiprotons are not used, a facility to collide heavy ions such as Lead was required.
While antiprotons are readily available there is no means to manufacture or handle antimatter Lead.
 

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How does the LHC operate
« Reply #8 on: 01/10/2010 10:05:39 »

 

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