Electrostatic Waves in a Warm Plasma A Fluid-Theory Example
In Chapter 2 we studied general wave propagation in an infinite, cold, two-component plasma which was characterized by charged particles having no energy except the energy alternately gained and lost as a result of their participation in the wave motion. In this chapter, we restrict our study to the behavior of electrostatic waves propagating parallel to the applied magnetic field in so-called warm plasmas, which are characterized by charged particles having thermal energy. Whereas, for the cold plasma, we found only one purely electrostatic mode, which was simply a (nonpropagating) normal mode of oscillation of the plasma, we find that in a warm plasma the thermal pressure of the particles makes it possible for more than one purely electrostatic mode to exist and causes these modes to be propagating modes.
KeywordsElectrostatic Wave Thermal Speed Probe Separation General Dispersion Relation Electron Plasma Wave
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