Non-resonant current drive by RF helicity injection

A. Fukuyama, S. I. Itoh, K. Itoh, K. Hamamatsu, V. S. Chan, S. C. Chiu, R. L. Miller, T. Ohkawa

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

1 被引用数 (Scopus)

抄録

Current drive via non-resonant interaction between RF waves and plasma is studied by using kinetic wave analysis and computation in a stationary state. The non-resonant interaction generates a force, in addition to the usual ponderomotive force. The force under consideration mainly acts as an internal force among plasma species; the net momentum input from the wave to the plasma is small in this process. The current driven by this process is not included in the conventional current drive scheme (i.e. resonant absorption of the parallel wave momentum or wave energy) and appears to be associated with the change in the RF wave helicity 〈A·B〉. The analysis is applied to ICRF waves in large tokamaks. A one-dimensional wave analysis code (TASK/W1) shows that the conversion ratio of the RF wave helicity to the DC helicity becomes close to one in the case of hot plasmas. The current drive efficiency of RF helicity injection is not necessarily bounded by the conventional RF current drive efficiency. A preliminary study suggests that it scales strongly with electron temperature and toroidal magnetic field but only weakly with plasma density.

本文言語英語
ホスト出版物のタイトルProc 13 Int Conf Plasma Phys Controlled Nucl Fusion Res
出版社Publ by IAEA
ページ855-863
ページ数9
ISBN(印刷版)9201300913
出版ステータス出版済み - 1991

出版物シリーズ

名前Proc 13 Int Conf Plasma Phys Controlled Nucl Fusion Res

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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