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## Off Topic: Learning Resources About Beam Focusing

Forum: Fields: Magnetic and Otherwise
Date: 28 Feb, 2011
From: Grant <Grant>

 --000e0ce0f316c22e3f049d5e013c Content-Type: text/plain; charset=ISO-8859-1 Sorry for being slightly off topic, but I figured this is a good place to find specialised advice: Could someone suggest learning resources (papers, books, presentations, lectures, etc.) about to focus changed particle beams? In my Geant4 simulations I am using a triplet of quadrapole magnets to focus a beam of protons. The fields are idealised (eg, not fringe effects) and I would like to learn more about how to model more realistic fields. Also, how to optimise focusing based on magnet parameters and position (have been using trial and error so far). Finally, I am interested in Halbach cylinders and/or other promising focusing approaches. Resources that derive or list field equations seem particularly important, but more general 'gentle introductions' would also be helpful for me. TIA --000e0ce0f316c22e3f049d5e013c Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Sorry for being slightly off topic, but I figured this is a good place to f= ind specialised advice:

Could someone suggest learning resources (pa= pers, books, presentations, lectures, etc.) about to focus changed particle= beams?

In my Geant4 simulations I am using a triplet of quadrapole magnets to = focus a beam of protons.=A0 The fields are idealised (eg, not fringe effect= s) and I would like to learn more about how to model more realistic fields.= =A0 Also, how to optimise focusing based on magnet parameters and position = (have been using trial and error so far).=A0

Finally, I am interested in Halbach cylinders and/or other promising fo= cusing approaches.

Resources that derive or list field equations see= m particularly important, but more general 'gentle introductions' w= ould also be helpful for me. TIA
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