Stochastic Model of Electron Cyclotron Heating in a Magnetic Mirror
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概要
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The mechanism of heating of electron plasmas by high-power microwaves in a magnetic mirror is investigated theoretically, in reference to the experiments in a device named TP-M. A microwave mode propagating perpendicular to the magnetic field is assumed to be responsible for heating, as there exist higher harmonic resonances, the main features of the experiments. The heating mechanism can be interpreted in terms of a stochastic process, a random walk in velocity space. It is numerically confirmed that the localized resonance zones of finite width exist and electrons are effectively heated only in the resonance zones, and that the presence of a randomization process of the relative phase relation between the wave and the electron gyration is essential to heating. On the basis of the numerical analysis the heating process is analytically treated. Electrons are supposed to pass the resonance zones repeatedly in the course of oscillatory motions between turning points, and the relative phase relation is assumed to be random at each passage through the resonance zone. The heating rate is calculated and is found to be in agreement with the experimental value. The causes of phase randomization and the observed staturation of electron temperature are also discussed.
- 核融合科学研究所の論文
著者
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TERASHIMA Yoshinosuke
Research Information Center, Institute of Plasma Physics, Nagoya University
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Terashima Yoshinosuke
Research Information Center Institute Of Plasma Physics Nagoya University
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Namba Chusei
Research Information Center Institute Of Plasma Physics Nagoya University:department Of Electronics
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KAWAMURA Takaichi
Research Information Center, Institute of Plasma Physics, Nagoya University
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MOMOTA Hiromu
Research Information Center, Institute of Plasma Physics, Nagoya University
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Momota Hiromu
Research Information Center Institute Of Plasma Physics Nagoya University
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Kawamura Takaichi
Research Information Center Institute Of Plasma Physics Nagoya University
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Momota Hiromu
Research Information Center Institute Of Plasma Physics Nagoya University:department Of Electrical E
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