How does the LHC operate

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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.
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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

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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.
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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!
...And its claws are as big as cups, and for some reason it's got a tremendous fear of stamps! And Mrs Doyle was telling me it's got magnets on its tail, so if you're made out of metal it can attach itself to you! And instead of a mouth it's got four arses!

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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.

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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 »
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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. 

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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.
There ain'ta no sanity clause, and there ain'ta no centrifugal force ćther.

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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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