Stream instabilities in relativistically hot plasma

Abstract

The instabilities of relativistic ion beams in a relativistically hot electron background are derived for general propagation angles. It is shown that the Weibel instability in the direction perpendicular to the streaming direction is the fastest growing mode, and probably the first to appear, consistent with the aligned filaments that are seen in PIC simulations. Oblique, quasiperpendicular modes grow almost as fast, as the growth rate varies only moderately with angle, and they may distort or corrugate the filaments after the perpendicular mode saturates.

10 pages, 6 figures

References in corpus (4)

• Particle acceleration in relativistic collisionless shocks: Fermi process at last?
• On the structure of relativistic collisionless shocks in electron-ion plasmas
• Dispersion and thermal effects on electromagnetic instabilities in the precursor of relativistic shocks
• Two-stream-like instability in dilute hot relativistic beams and astrophysical relativistic shocks

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