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Theory of longitudinal beam halo in RF linacs [electronic resource] : I. core/test-particle formulation

Published
Washington, D.C. : United States. Dept. of Energy, 1997.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy.
Physical Description
6 pages : digital, PDF file
Additional Creators
Lawrence Livermore National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information
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Summary
For intense beams, the analysis of tenuous halo components of the particle distribution that surround the main core of the distribution can be challenging. So-called core/test particle models in which a test particle is evolved in the applied and space-charge forces of the beam core have been instrumental in understanding the structure and extent of transverse beam halo produced by resonant particle interactions with the oscillating space-charge forces of a mismatched beam core. Here we present a core/test particle model developed for the analysis of longitudinal beam halo in intense, ion-beam rf linacs. Equations of motion are derived for a test particle moving interior to, and exterior to, a uniform density ellipsoidal beam bunch. Coupled transverse-longitudinal mismatch modes of the ellipsoidal beam envelope are analyzed. Typical parameters suggest the possibility of a low-order resonant interaction between longitudinal particle oscillations and a low-frequency envelope mode. Properties of this resonance are in an accompanying paper by the authors in these proceedings.
Report Numbers
E 1.99:ucrl-jc--127298-pt.1
E 1.99: conf-970503--
conf-970503--
ucrl-jc--127298-pt.1
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Note
Published through SciTech Connect.
05/01/1997.
"ucrl-jc--127298-pt.1"
" conf-970503--"
"DE98050874"
17. IEEE particle accelerator conference, Vancouver (Canada), 12-16 May 1997.
Barnard, J.J.; Lund, S.M.
Funding Information
W-7405-ENG-48
View MARC record | catkey: 14689439