A GENERAL PROBE THEORY FOR MEASUREMENTS IN A PLASMA

Abstract

The standard model of floating probes in plasmas is reviewed. It is shown that a maximum charge density exists for the application of this model. An explicit expression of voltage applied to the probes in terms of circuit current is obtained. When certain simplifying assumptions are used, this equation is reduced to the Langmuir single probe equation and the Johnson-Malter double probe equation. From measurements of probe current versus applied probe voltage, electron temperature at each respective probe can be determined. One example is given to illustrate the calculation.

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Document Details

Document Type
Technical Report
Publication Date
Jan 22, 1962
Accession Number
AD0273757

Entities

People

  • Charles M. Cason
  • T. A. Barr Jr.

Tags

Communities of Interest

  • Biomedical
  • Weapons Technologies

DTIC Thesaurus Topics

  • Charged Particles
  • Coefficients
  • Data Analysis
  • Electrical Conductivity
  • Electron Density
  • Electron Mobility
  • Electrons
  • Engineering
  • Equations
  • Free Electrons
  • Ionization
  • Measurement
  • Military Research
  • Munitions
  • Physics
  • Physics Laboratories
  • Standards

Readers

  • Calculus or Mathematical Analysis
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Plasma Physics / Magnetohydrodynamics

Technology Areas

  • Microelectronics