Physics
Scientific paper
Feb 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87..833s&link_type=abstract
Journal of Geophysical Research, vol. 87, Feb. 1, 1982, p. 833-841.
Physics
6
Beam Plasma Amplifiers, Cold Plasmas, Electron Beams, Electron Plasma, Magnetohydrodynamic Stability, Space Plasmas, Auroral Zones, Group Velocity, Gyrofrequency, Plasma Frequencies, Plasma Jets, Plasma Waves, Solar Wind
Scientific paper
Electron beam instabilities are investigated by using a simple model for an electron beam streaming through a cold plasma, the beam being of finite width perpendicular to the ambient magnetic field. Through considerations of finite geometry and the coldness of the beam and background plasma, an instability similar to the two stream instabilities is assumed to be the means for wave growth in the system. Having found the maximum rate of growth for one set of beam-plasma system parameters, this maximum growth rate is traced as these parameters are varied. The parameters that describe the system are the beam velocity, the electron gyrofrequency to ambient electron plasma frequency ratio, the beam to background number density ratio and the beam half width.
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