Ionization Cooling in all Phase Space Planes with Various Absorber Shapes, Including Parallel-Faced Absorbers

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dc.creatorBerg, J. Scott
dc.date2006-07-30
dc.date.accessioned2026-07-07T12:00:24Z
dc.date.available2026-07-07T12:00:24Z
dc.descriptionIonization cooling in a straight beamline reduces the transverse emittance of a beam, and has little effect on the longitudinal emittance (generally, in fact, it increases the longitudinal emittance). Once the beamline bends, the introduction of dispersion creates a coupling between the transverse and longitudinal planes. If this coupling is handled properly, one can achieve cooling in all three phase space planes. This is usually done by placing a wedge-shaped absorber in a region where there is dispersion. I will demonstrate using an eigenvalue analysis that there are other configurations of dispersion and absorber shape that will achieve ionization cooling in all phase space planes. In particular, I will show that a one can even achieve cooling in all phase planes with a parallel-faced absorber in a dispersion-free region. I will use perturbation theory to approximate the change in the cooling rates due to longitudinal-transverse coupling. I will then describe how the cooling of longitudinal oscillations can be understood via the projection of the "longitudinal" eigenmodes into the transverse plane.
dc.descriptionSubmitted to Nuclear Instruments and Methods in Physics Research A. 10 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/physics/0607278
dc.identifierhttp://arxiv.org/abs/physics/0607278
dc.identifierNucl.Instrum.Meth.A569:677-684,2006
dc.identifierdoi:10.1016/j.nima.2006.09.036
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/206836
dc.subjectAccelerator Physics
dc.titleIonization Cooling in all Phase Space Planes with Various Absorber Shapes, Including Parallel-Faced Absorbers
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