Oblique electromagnetic instabilities for a hot relativistic beam interacting with a hot and magnetized plasma

A. Bret, M. E. Dieckmann, C. Deutsch

doi:10.1063/1.2335414

Oblique electromagnetic instabilities for a hot relativistic beam interacting with a hot and magnetized plasma

DOI PDF 被引用文献2件

A. Bret

Universidad de Castilla-La Mancha ETSI Industriales, , 13071 Ciudad Real, Spain
M. E. Dieckmann

Ruhr-University Bochum Faculty of Physics and Astronomy, , D-44780 Bochum, Germany
C. Deutsch

Université Paris XI Laboratoire de Physique des Gaz et des Plasmas (CNRS-UMR 8578), , Bâtiment 210, 91405 Orsay Cedex, France

抄録

<jats:p>The temperature-dependent fluid model from Phys. Plasmas 13, 042106 (2006) is expanded in order to explore the oblique electromagnetic instabilities, which are driven by a hot relativistic electron beam that is interpenetrating a hot and magnetized plasma. The beam velocity vector is parallel to the magnetic-field direction. The results are restricted to nonrelativistic temperatures. The growth rates of all instabilities but the two-stream instability can be reduced by a strong magnetic field so that the distribution of unstable waves becomes almost one dimensional. For high beam densities, highly unstable oblique modes dominate the spectrum of unstable waves as long as ωc∕ωp≲2γb3∕2, where ωc is the electron gyrofrequency, ωp is the electron plasma frequency, and γb is the relativistic factor of the beam. A uniform stabilization over the entire k space cannot be achieved.</jats:p>