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Investigation of ECRH effects on the fast ion slowing-down process and confinement

Y Kurimoto, H Zushi, F Sano, K Kondo, T Obiki1997年Fusion Engineering and DesignIF 1.7出版社

AbstractIn the Heliotron E device, fast ion slowing-down processes (deceleration, parallel diffusion, and pitch angle scattering) and the particle loss process are investigated by the measurement temporal behaviour of charge-exchange energy spectra during neutral beam injection (NBI). Using electron cyclotron resonance heating (ECRH), two effects are studied with respect to: (1) extrapolation of slowing-down behaviour to a longer slowing-down time and (2) modification of the ion loss associated with the radial electric field. It is found that (1) there are discrepancies :in the theoretical value in the deceleration and the parallel diffusion processes in NBI + ECRH and ECRH plasmas, and that (2) the particle loss is reduced by the use of ECRH on the NBI plasma.

日本語訳

ヘリオトロンE装置において、高速イオンの減速過程(減速、平行拡散、ピッチ角散乱)および粒子損失過程を、中性粒子ビーム入射(NBI)中の荷電交換エネルギースペクトルの時間的挙動の測定によって調べた。電子サイクロトロン共鳴加熱(ECRH)を用いて、以下の2つの効果について研究した:(1)減速挙動のより長い減速時間への外挿、(2)径方向電場に関連するイオン損失の変化。その結果、(1)NBI+ECRHおよびECRHプラズマにおける減速および平行拡散過程の理論値に不一致があること、および(2)NBIプラズマへのECRHの使用により粒子損失が低減されることが見出された。

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Fusion Advanced Studies TorusEnergetic ionElectron cyclotron heating
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