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Between two stream and filamentation instabilities: Temperature and collisions effects

Published online by Cambridge University Press:  06 March 2006

ANTOINE BRET ,
MARIE-CHRISTINE FIRPO  and
CLAUDE DEUTSCH
ANTOINE BRET
Affiliation:
ETSI Industriales, Universidad Castilla la Mancha, Ciudad Real, Spain
MARIE-CHRISTINE FIRPO
Affiliation:
Laboratoire de Physique et Technologie des Plasmas (CNRS-UMR 7648), Ecole Polytechnique, Palaiseau, France
CLAUDE DEUTSCH
Affiliation:
Laboratoire de Physique des Gaz et des Plasmas (CNRS-UMR 8578), Université Paris XI, Orsay cedex, France
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Abstract

We will consider relativistic electron beam interacting with plasma and study the electromagnetic instabilities obtained for arbitrarily oriented wave vectors ranging from two-stream to filamentation instabilities. For these unstable modes, we will study every temperature effects, namely beam and plasma normal, and parallel temperatures. Temperatures are supposed to be non-relativistic and modeled through water bag distributions. It is found that only normal beam temperature and parallel plasma temperature have a significative influence over the growth rates for wave vector making an angle with the beam larger than a critical angle θc which is determined exactly. The largest growth rate being reached for a wave vector making an angle with the beam smaller than θc, it is not damped by any kind of temperatures. We finally explore collisions effects and show they can reduce the largest growth rate.

Keywords

Fast ignition scenarioFilamentation instabilityTwo-stream instabilityWeibel instability
Type
Research Article
Information
Laser and Particle Beams , Volume 24 , Issue 1 , March 2006 , pp. 27 - 33
Copyright
© 2006 Cambridge University Press

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References

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