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MICROWAVE PROBING OF IONIZED GAS FLOWS
CALIFORNIA INST OF TECH PASADENA GUGGENHEIM JET PROPULSION CENTER
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The measurement of free electron densities and collision frequencies in ionized gas flows by a probing transverse microwave beam is described. Interpretation of the observed reflection and transmission coefficients and their phases is developed on the basis of an idealized plane wave-plane slab model, for which typical results are displayed. Application of the device and technique to the build-up of ionization behindA STRONG SHOCK IN ARGON IS OUTLINED. Effects of various departures of the microwave radiation patterns and flow configurations from the slab assumptions are discussed and examples evaluated. Author
APPROVED FOR PUBLIC RELEASE