MEASUREMENT OF ELECTRICAL CONDUCTIVITY IN A LOW-DENSITY SUPERSONIC PLASMA
Abstract
Electrical conductivities in the range from 70 to 280 mhos/meter were measured in an arc-heated, low-density, supersonic argon plasma. Measurements were made using a single layer coil acting as one branch of a tuned parallel circuit of a crystalcontrolled oscillator operating at 5 mc/sec. Electromagnetic coupling between radio-frequency-excited coils and plasmas was examined, and the results are presented in terms of a nondimensional parameter, Qs, which, for a particular coil, is a function only of the conductivity of the plasma surrounding the coil. Calculated conductivities using a combined form of the Spitzer-Harm and Chapman-Cowling equations for prescribed plasma conditions compare favorably with the measured results.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1965
- Accession Number
- AD0473662
Entities
People
- J. A. Sprouse
Organizations
- Arnold Engineering Development Complex