Collective temperature anisotropy instabilities in intense charged particle beams

Journal Article · Tue May 15 04:00:00 EDT 2007 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.2436847· OSTI ID:20975084

Startsev, Edward A; Davidson, Ronald C; Hong, Qin ^[1]

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1. Plasma Physics Laboratory, Princeton University, Princeton, New Jersey 08543 (United States)

The classical electrostatic Harris instability and the electromagnetic Weibel instability, both driven by a large temperature anisotropy (T{sub parallelb}/T{sub perpendicularb}<<1) that develops naturally in accelerators, are generalized to the case of a one-component intense charged particle beam with anisotropic temperature, including the important effects of finite transverse geometry and beam space-charge. Such instabilities may lead to an increase in the longitudinal velocity spread, which makes focusing the beam difficult, and may impose a limit on the beam luminosity and the minimum spot size achievable in focusing experiments. This paper describes recent advances in the theory and simulation of collective instabilities in intense charged particle beams caused by large temperature anisotropy. The new simulation tools that have been developed to study these instabilities are also described. Results of the investigations that identify the instability growth rates, levels of saturations, and conditions for quiescent beam propagation are also discussed.

• OSTI ID: 20975084
• Journal Information: Physics of Plasmas, Journal Name: Physics of Plasmas Journal Issue: 5 Vol. 14; ISSN PHPAEN; ISSN 1070-664X
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATORS
ANISOTROPY
BEAM LUMINOSITY
BEAM-PLASMA SYSTEMS
BEAMS
CHARGED PARTICLES
ELECTRON TEMPERATURE
FOCUSING
GEOMETRY
INSTABILITY GROWTH RATES
ION TEMPERATURE
PLASMA
PLASMA WAVES
SPACE CHARGE