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.

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Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1965
Accession Number
AD0473662

Entities

People

  • J. A. Sprouse

Organizations

  • Arnold Engineering Development Complex

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Calibration
  • Circuits
  • Conductivity
  • Couplings
  • Design Criteria
  • Electrical Circuits
  • Electrical Conductivity
  • Electrical Properties
  • Electromagnetic Fields
  • Inductance
  • Low Density
  • Measurement
  • Oscillators
  • Schematic Diagrams
  • Transducers

Fields of Study

  • Physics

Readers

  • Fluid Dynamics.
  • Microwave Engineering.
  • Plasma Physics.

Technology Areas

  • Hypersonics
  • Hypersonics - Hypersonic Flow