Thumbnail
Access Restriction
Open

Author Bohn, C. L.
Source United States Department of Energy Office of Scientific and Technical Information
Content type Text
Language English
Subject Keyword PARTICLE ACCELERATORS ♦ PARTICLE BEAMS ♦ BEAM DYNAMICS ♦ SPACE CHARGE ♦ FOKKER-PLANCK EQUATION ♦ BEAM EMITTANCE
Abstract An rms-mismatched beam can evolve rapidly to a configuration of quasiequilibrium under the influence of space-charge forces. As it evolves, its emittance grows and a diffuse halo forms. The beam{close_quote}s distribution function accounts for all of the complicated dynamics. Unfortunately, the distribution function is difficult to calculate inasmuch as the physics lies at the interface between classical mechanics and thermodynamics. This paper presents the foundation for a statistical theory of the dynamics of nonequilibrium space-charge-dominated beams. Within certain approximations, the theory takes on a Fokker-Planck form. Key questions arise concerning the nature of the dynamical friction and diffusion in the beam{close_quote}s phase space and of the quasiequilibrium configuration that ensues. {copyright} {ital 1996 American Institute of Physics.}
ISSN 0094243X
Educational Use Research
Learning Resource Type Article
Publisher Date 1996-06-01
Publisher Department Thomas Jefferson National Accelerator Facility
Publisher Place United States
Volume Number 377
Issue Number 1
Technical Publication No. CONF-9510361-
Organization Thomas Jefferson National Accelerator Facility


Open content in new tab

   Open content in new tab