Adiabatic Rormation of a Matched-beam Distribution for an Alternating-gradient Quadrupole Lattice
Authors: Mikhail A. Dorf, Ronald C. Davidson, Edward A. Startsev, and Hong Qin
Abstract:
The formation of a quasiequilibrium beam distribution matched to an alternating-gradient quadrupole focusing lattice by means of the adiabatic turn-on of the oscillating focusing field is studied numerically using particle-in-cell simulations. Quiescent beam propagation over several hundred lattice periods is demonstrated for a broad range of beam intensities and vacuum phase advances describing the strength of the oscillating focusing field. Properties of the matched-beam distribution are investigated. In particular, self-similar evolution of the beam density profile is observed over a wide range of system parameters. The numerical simulations are performed using the WARP particle-in-cell code.
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Submitted to: Physics of Plasmas (October, 2009)
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Download PPPL-4486 (pdf 191kb KB 10 pp)
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