ミラー磁場内でのマイクロ波とプラズマの相互作用-1-

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In the present paper are described the results of experiment on the interaction between a plasma, in particular, its electron component and a microwave in some types of magnetic field. A static magnetic field was externally produced v a pair of air core coil blocks consisting of some seperated coils, and a cylindrical cavity was set between the coil blocks. A, plasma beam was stationarily injected into the cavity on and along its axis, Microwave power was pulsively fed into it from a magnetron oscillator, too. The interaction in interest was investigated by measuring the flux and energy of soft x-rays emitted from plasma with an x-ray detector, and by analysing pulses of current diffusing across magnetic lines of force accepted by a probe. The emission of soft x-ray was observed only when the magnetic field was of mirror geometry, and was found to depend strongly upon the position of electron cyclotron resonance zone in a mirror field. Furthermore, the observation of pressure dependence of the emission showed that, if any gas was used, secondary electrons produced by fast ones in the trapping region could gain much energy from the microwave and become energetic particles, under an appropriate condition. From the decaying slope of probe current pulses was obtained the mean lifetime of trapped particles, from which some informations about the accelerating rate for trapped electrons could be got as well as from the x-ray energy. In the final part of this paper interpretations of the results mentioned above are made from the view of the single particle model.
社団法人プラズマ・核融合学会の論文

ミラー磁場内でのマイクロ波とプラズマの相互作用-1-

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