Determination of Electron Density in Magneto-Plasma with Electrostatic Probe

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概要

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• The effects of magnetic field, pressure and discharge current on the saturation electron current flowing in a cylindrical probe are investigated by use of two methods: one is based on the probe characteristic of ion current and the other on the microwave measurement. Experiments are made in helium at pressures ranging from 0.3 to 1.6mmHg with 10^<11>〜10^<12> cm^<-3> of plasma electron density and 0〜5000 gauss of magnetic field strength. Results of experiments show that the thickness of sink region around the probe perpendicular to the magnetic field is given by V_e/(ω^2_p+ω^2_B)^<1/2> where V_e is the thermal velocity of electron, and ω_p and ω_B are the angular frequencies of electron plasma and cyclotron, respectively. Use of this region and the theory developed by Dote enables us to determine the numerical value of the electron density of magneto-plasma. The result obtained by using electron current characteristic of the probe with its axis parallel to the magnetic flux agrees well with the real density. The measurement on the probe perpendicular to the magnetic lines of force is also carried out.

• 社団法人日本物理学会の論文
• 1967-03-05

著者

• Miyoshi Syoichi

  The Institute Of Physical And Chemical Research

関連論文

• Measurement of Ion Temperature of a Plasma in Magnetic Field with a Gridded Probe
• Density Distribution and Particle Diffusion in an Energetic Arc in a Magnetic Field
• Detection of Ion Wave in Electron-Beam-Plasma by Optical Correlation
• A Study of Electron Beam Collector with Ionization Cavity
• Application of Carbon Dioxide Laser Interferometer to Measurement of Plasma Electron Density
• Determination of Electron Density in Magneto-Plasma with Electrostatic Probe

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