Temporal Observation of Potential Structure by Direct Measurement of Loss-Cone Boundaries in the Tandem Mirror Gamma-10

Kameo Ishii; Toshiki Takahashi; Akira Abe; Isao Katanuma; Akiyosi Itakura; Makoto Ichimura; Yasuhito Kiwamoto; Kiyoshi Yatsu; Teruo Tamano

doi:dx.doi.org/10.13182/FST95-A11947118

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Temporal Observation of Potential Structure by Direct Measurement of Loss-Cone Boundaries in the Tandem Mirror Gamma-10

Kameo Ishii, Toshiki Takahashi, Akira Abe, Isao Katanuma, Akiyosi Itakura, Makoto Ichimura, Yasuhito Kiwamoto, Kiyoshi Yatsu, Teruo Tamano

Fusion Science and Technology / Volume 27 / Number 3T / April 1995 / Pages 413-416

Mirror Device Studies / dx.doi.org/10.13182/FST95-A11947118

Published:February 8, 2018

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Loss-cone boundaries have been directly measured using a newly developed diagnostic device in the tandem mirror GAMMA 10. Double loss boundaries clearly appeared in the velocity space of the end-loss ions in the experiment without plug ECRH, and upon turning on the ECRH, the double boundaries changed to a single loss boundary. From a microscopic viewpoint of the ion distribution function, it was verified that plug potential was created turning on ECRH without producing sloshing ions by neutral beam injection. Time evolution of plasma potentials is discussed.