Diffusion Measurement in an Axially Decaying Magnetized Plasma with Oscillations
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概要
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The theory of the diffusion wave proposed by Golubev in magnetized plasmas is extended to include the wide ranges of the pressure and the magnetic field. The wave of 2 kHz is excited at the tube end by modulating the amplitude of the high frequency, which produces an axially decaying plasma in a He gas at the pressure of 80 m Torr. The diffusion coefficients parallel and perpendicular to the magnetic field are calculated from the measured phase constant of the excited wave and the density decaying length, and agree fairly well with the ambipolar values, so far as the noise level is relatively low. The oscillation has almost a constant frequency of a few kHz in the magnetic field higher than 320 Gauss. It is found that the oscillation results from a helical type instability.
- 社団法人日本物理学会の論文
- 1971-09-05
著者
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Kando Masashi
Department Of Electric And Electronic Engineering Shizuoka University
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Takeda Susumu
Department Of Electrical Engineering Faculty Of Engineering Nagoya University
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