Effects of overlapping parametric resonances on the particle diffusion process.
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics
; 60(5 Pt B): 6051-60, 1999 Nov.
Article
em En
| MEDLINE
| ID: mdl-11970510
ABSTRACT
The evolution of the beam distribution in a double-rf system with a phase modulation on either the primary or secondary rf cavity was measured. We find that the particle diffusion process obeys the Einstein relation if the phase space becomes globally chaotic. When dominant parametric resonances still exist in the phase space, particles stream along the separatrices of the dominant resonance, and the beam width exhibits characteristic oscillatory structure. The particle-tracking simulations for the double-rf system are employed to reveal the essential diffusion mechanism. Coherent octupolar motion has been observed in the bunch beam excitation. The evolution of the longitudinal phase space in the octupole mode is displayed.
Buscar no Google
Coleções:
01-internacional
Base de dados:
MEDLINE
Idioma:
En
Revista:
Phys Rev E Stat Phys Plasmas Fluids Relat Interdiscip Topics
Assunto da revista:
MEDICINA
Ano de publicação:
1999
Tipo de documento:
Article
País de afiliação:
Estados Unidos