Instability in a Weakly Ionized Afterglow Plasma with a Magnetic Field in a Short Tube
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概要
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In a very short discharge tube, the oscillation with a frequency of a few kHz appears in the afterglow with a relatively weak magnetic field. The frequency of the observed oscillation is much lower than the ion cyclotron frequency. The critical magnetic field B_c, when the instability sets up, is proportional to the pressure P and B_c/P becomes smaller in the shorter tube. The diffusion deviates from the classical value, when the magnetic field exceeds B_c. The oscillation is theoretically analysed to be due to an instability enhanced by the large axial density gradient. The theory is based on the two fluid model which takes the axial density gradient into account, neglecting the ion and electron inertia terms. The observed frequency, the relation between B_c and P or the tube length, and the relation between P and the oscillation amplitude can be explained by the present theory.
- 社団法人日本物理学会の論文
- 1970-07-05
著者
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TAKEDA Susumu
Department of Electrical Engineering Nagoya University
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MINAMI Kazuo
Department of Electrical Engineering Nagoya University
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KANDO Masashi
Department of Electrical Engineering, Nagoya University
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UNO Takehiko
Department of Electrical Engineering, Nagoya University
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Uno Takehiko
Department Of Electrical And Electronic Engineering Kanagawa Institute Of Technology
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Kando Masashi
Department Of Electrical Engineering Nagoya University
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Minami Kazuo
Department Of Applied Biology Kyoto Institute Of Technology
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Uno Takehiko
Department Of Electrical Engineering Nagoya University
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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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TAKEDA Susumu
Department of Electrical Engineering, Nagoya University
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