Accession Number : AD0717957

Title :   Experimental and Theoretical Studies into Pulse and Wave Phenomena in Plasmas.

Descriptive Note : Final rept. 15 Oct 69-30 Sep 70,

Corporate Author : SPERRY RAND RESEARCH CENTER SUDBURY MASS

Personal Author(s) : Baird,Albert W. ; Lustig,Claude D.

Report Date : NOV 1970

Pagination or Media Count : 20

Abstract : The report describes an investigation of methods for measuring the electron density in a reentry shaft. The methods include excitation of electroacoustic resonances and the observation of enhanced microwave breakdown. Good agreement is obtained between electron density profiles determined from electroacoustic resonance frequencies measured for a laboratory plasma and those calculated theoretically. If higher order resonances can be observed, departures of the profile from linearity can be obtained. Measurements of enhanced breakdown in a laboratory plasma under simulated reentry conditions suggest that this method should be feasible for some reentry plasmas. A hollow cathode plasma source was constructed in an attempt to simulate low altitude reentry plasmas. (Author)

Descriptors :   (*PLASMA SHEATHS, ELECTRON DENSITY), (*ATMOSPHERE ENTRY, SIMULATION), MICROWAVES, OSCILLATION, PLASMAS(PHYSICS), PROBES, PLASMA GENERATORS, RESONANCE

Subject Categories : Atmospheric Physics
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE