PROPAGATION AND INSTABILITIES IN BOUNDED AND FINITE TEMPERATURE PLASMAS.
CALIFORNIA UNIV BERKELEY ELECTRONICS RESEARCH LAB
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The quasi-static analysis is used to examine propagation and instabilities in plasmas in which both the transverse bounds and the temperature are important. Initially only longitudinal thermal velocity is assumed and two stream instabilities are studied. With the introduction of transverse temperature, instabilities resulting from temperature anisotropy are also studied. The full set of Maxwells equations is utilized for an investigation of the effects of dispersion on the synchrotron radiation spectrum. The investigation of hot plasmas with finite boundaries was undertaken initially to explain the differences between phenomena found in experimental observations and those predicted by the cold plasma theory. Longitudinal temperature is added to the model and it is found that strong cyclotron wave damping and the absence of the cyclotron-cyclotron interaction in a two stream configuration are predicted by the theory. Introducing transverse temperature into the model, using the Boltzmann equation, instabilities arising from temperature anisotropy are investigated and it is found that, for a bi-Maxwellian distribution, for low values of k sub z the plasma is stable. The investigation of finite plasmas with transverse temperature is pursued by consideration of a configuration in which a boundary layer region is included and the particle density decreases to zero through this region. Author
- Plasma Physics and Magnetohydrodynamics
- Radiofrequency Wave Propagation