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How to focus a beam of charged particles?

  1. Aug 21, 2008 #1
    I was discovering a way to focus a number of charged particles which has been accelerated by Van de Graff generator into a beam.I do tried to find ideas in uniform magnetic field,but it seems I can only focus the particles onto a point rather than a beam.So here I was asking whether there had been any means discovered before?

  2. jcsd
  3. Aug 21, 2008 #2


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    For many particle accelerators, one "focuses" a beam of charge particles using quadrupole magnets.

  4. Aug 21, 2008 #3
    Thanks for your reply.Would you mind if you describe it in details?
  5. Aug 21, 2008 #4


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    Use google, there are plenty of good resorces out there. Then you can ask more specific questions if you enounter any problems.

    If you don't find anything, I can give you a bunch of links to lecture notes.
  6. Aug 26, 2008 #5
    I've purchased two books on electromagnetic field designing.Thanks for your information.
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