Recent progresses in relativistic beam-plasma instability theory

Details Recent progresses in relativistic beam-plasma instability theory Recent progresses in relativistic beam-plasma instability theory

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010angeo..28.2127b&link_type=abstract

Annales Geophysicae, Volume 28, Issue 11, 2010, pp.2127-2132

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

Beam-plasma instabilities are a key physical process in many astrophysical phenomena. Within the fireball model of Gamma ray bursts, they first mediate a relativistic collisionless shock before they produce upstream the turbulence needed for the Fermi acceleration process. While non-relativistic systems are usually governed by flow-aligned unstable modes, relativistic ones are likely to be dominated by normally or even obliquely propagating waves. After reviewing the basis of the theory, results related to the relativistic kinetic regime of the poorly-known oblique unstable modes will be presented. Relevant systems besides the well-known electron beam-plasma interaction are presented, and it is shown how the concept of modes hierarchy yields a criterion to assess the proton to electron mass ratio in Particle in cell simulations.

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