Physics
Scientific paper
May 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990phflb...2..867y&link_type=abstract
Physics of Fluids B (ISSN 0899-8221), vol. 2, May 1990, p. 867-873. Research supported by NASA.
Physics
9
Cold Plasmas, Electromagnetic Radiation, High Frequencies, Relativistic Plasmas, Synchrotron Radiation, Maser Outputs, Plasma Frequencies, Saddle Points, Wave Amplification, Wave Propagation
Scientific paper
The amplification of a high-frequency transverse electromagnetic wave by a relativistic plasma component, via the synchrotron maser process, is studied. The background plasma that supports the transverse wave is considered to be cold, and the energetic component whose density is much smaller than that of the background component has a loss-cone feature in the perpendicular momentum space and a finite field-aligned drift speed. The ratio of the background plasma frequency squared to the electron gyrofrequency squared is taken to be sufficiently larger than unity. Such a parameter regime is relevant to many space and astrophysical situations. A detailed study of the amplification process is carried out over a wide range of physical parameters including the loss-cone index, the ratio of the electron mass energy to the temperature of the energetic component, the field-aligned drift speed, the normalized density, and the wave propagation angle.
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