Accession Number : AD0697880

Title :   MICROWAVE TRANSMISSION THROUGH A MAGNETOPLASMA SLAB NEAR THE PLASMA CUTOFFS,

Corporate Author : LOCKHEED MISSILES AND SPACE CO PALO ALTO CALIF LOCKHEED RESEARCH LAB

Personal Author(s) : Tetenbaum,S. J.

Report Date : 21 APR 1969

Pagination or Media Count : 4

Abstract : The extraordinary wave transmission through the afterglow of an rf-excited, electrodeless, helium discharge has been investigated experimentally. The discharge approximates a low collision frequency plasma slab of relatively uniform electron density in a uniform magnetic field. Measurements were performed at 18.0 and 9.15 GHz. A transmission minimum occurs very close to the higher frequency cutoff and a large decrease in transmission occurs close to the lower frequency cutoff. The plasma cutoff positions are approximately independent of energy in the electron energy range from thermal energy to a few electron volts and of pressure in the pressure range from 0.08 to 2.5 Torr. The position of the transmission minimum coincides with the position of the emission peak previously observed. (Author)

Descriptors :   (*PLASMA MEDIUM, *RADIO TRANSMISSION), MICROWAVES, GAS DISCHARGES, HELIUM, ELECTRON DENSITY

Subject Categories : Plasma Physics and Magnetohydrodynamics
      Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE