Conceptual foundation of the Fokker-Planck approach to space-charge effects
- Continuous Electron Beam Accelerator Facility, Newport News, Virginia 23606 (United States)
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.}
- Research Organization:
- Thomas Jefferson National Accelerator Facility
- DOE Contract Number:
- AC05-84ER40150
- OSTI ID:
- 383696
- Report Number(s):
- CONF-9510361-; ISSN 0094-243X; TRN: 96:026288
- Journal Information:
- AIP Conference Proceedings, Vol. 377, Issue 1; Conference: Space charged dominated beams and applications of high brightness beams, Bloomington, IN (United States), 13-15 Oct 1995; Other Information: PBD: Jun 1996
- Country of Publication:
- United States
- Language:
- English
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