Physics
Scientific paper
Aug 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988phfl...31.2238k&link_type=abstract
Physics of Fluids (ISSN 0031-9171), vol. 31, Aug. 1988, p. 2238-2248. Navy-NSF-supported research.
Physics
8
Cold Plasmas, Distribution Functions, Plasma Interactions, Plasma Waves, Relativistic Electron Beams, Wave Interaction, Beam Plasma Amplifiers, Cyclotron Resonance, Electromagnetic Radiation, Electrostatic Waves, Linear Systems, Magnetohydrodynamic Stability, Plasma Frequencies, Wave Propagation
Scientific paper
A ring-beam distribution function of moderately relativistic electrons is unstable to electromagnetic and electrostatic waves. The results obtained in numerical simulations show that electromagnetic radiation corresponding to the normal modes of the background plasma is observed to grow even in the presence of a strong electrostatic instability and becomes very strong when the growth of the electrostatic Langmuir waves is minimized, and that the instability process is best described as a beam cyclotron resonance. Another strong radiation generated by the ring beam is the Z mode which is coupled to the electrostatic Langmuir wave. Under certain circumstances, these mechanisms may be significant in astrophysical situations.
Gaffey John Dean Jr.
Hu W. X.
Kainer Selig
Price Channon P.
Zhou Guo-Cheng
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