INCOHERENT SCATTERING FROM A PLASMA. I. THE ELECTRONIC SPECTRUM. II. THE ION-CARRIED ELECTRONIC SPECTRUM
ELECTRONIC SYSTEMS DIV HANSCOM AFB MA
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The purpose of this analysis is twofold 1 to review some aspects of the theory on density fluctuations in a plasma Part 1 and 2 to introduce a novel method for the determination of the fluctuation spectrum of a multicomponent plasma Part II. Part I attempts to follow the theory that starts from first principles dynamics of point-charged particles and leads to the derivation on of coarse-grained properties of a plasma in order to compute the response of the plasma to an externally applied longitudinal field. By applying the Nyquist theorem to the response function of the system, we derive the fluctuation spectrum. Part II introduces a technique by which the space and time-dispersive response function of a plasma that has an arbitrary number of charged constituents can be evaluated with little effort. The technique consists of reducing the problem to one in network theory. The network corresponding to a plasma is a bank of capacitors in paralled, with each capacitor representing one constituent of the plasma. A pliers entry at any desired location in the network determines the response function to an applied external potential.
- Plasma Physics and Magnetohydrodynamics
- Atomic and Molecular Physics and Spectroscopy