Physics – Plasma Physics
Scientific paper
Oct 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003aps..dppuo1005c&link_type=abstract
American Physical Society, 45th Annual Meeting of the Division of Plasma Physics, October 27-31, 2003, Albuquerque, New Mexico,
Physics
Plasma Physics
Scientific paper
We present a model of coherent emission directly connected to the process of particle acceleration to high energies due to collisionless shock waves, including the full relativistic effects. We consider acceleration by either plasma wave turbulence or quasi-perpendicular shocks. The particular plasma waves we consider propagate mainly perpendicular to the magnetic field, which can accelerate electrons by the surfatron process (Katsouleas & Dawson 1983). It is not the field that accelerate it is the longitudinal wave. Both surfatron and the shock acceleration provide us with velocity space ring type distribution functions, which we demonstrate are ideal for generating cyclotron maser radiation. A coherent emission mechanism would explain the high brightness measurements without having to rely on special geometrical effects. The model we propose is directly linked to the injection and acceleration of particles at shocks and does not need a second stage process since it cannot be separated from the acceleration process. The radiation is a result of the relaxation process whenever an anisotropic distribution is formed. A laboratory experiment to simulate the effect will also be discussed.
Bingham Robert
Cairns Alan
Kellett Barry
Mendonca Tito J.
Phelps Alan
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