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Author(s):
H. Idei, K. Ida, H. Sanuki, H. Yamada, H. Iguchi, S. Kubo, R. Akiyama, H. Arimoto, M. Fujiwara, M. Hosokawa, K. Matsuoka, S. Morita, K. Nishimura, K. Ohkubo, S. Okamura, S. Sakakibara, C. Takahashi, Y. Takita, K. Tsumori and I. Yamada
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Title:
Transition of Radial Electric Field by Electron Cyclotron Heating in Stellarator Plasmas
Date of publication:
June 1993
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Key words:
transition, radial electric field, density pump-out, electron cyclotron heating, stellarator, neoclassical particle flux
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Abstract:
The transition of a radial electric field from a negative to a positive value is observed in Compact Helical System when the electron loss is sufficiently enhanced by the superposition of the off-axis second harmonic electron cyclotron heating on the neutral beam heated plasmas. The observed threshold for the enhanced particle flux required to cause the transition is compared with a theoretical prediction.
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