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Charge exchange neutral particle analysis on ICRF-heated plasmas in the GAMMA10 tandem mirror

Y Nakashima, M Shoji, K Yatsu, K Tsuchiya, T Tamano1997年Fusion Engineering and DesignIF 1.7出版社

AbstractThe ion energy balance in the central cell of the GAMMA10 tandem mirror is investigated for ICRF-heated plasmas on the basis of ion temperatures determined from charge exchange neutral particle measurements. The radial profiles of perpendicularly heated ions are measured using a neutral particle energy analyser (NPA). An experiment on ICRF power modulation is performed in order to evaluate the energy confinement. The resultant temporal change in the ion temperature is analysed from the charge exchange neutrals and central cell diamagnetism. A time evolution code of ion energy balance based on the radial profiles of measured plasma parameters is developed to predict the temporal behaviour of the ion stored energy and the calculated results are compared with the measurements.

日本語訳

ガンマ10タンデムミラーの中心セルにおけるイオンエネルギー収支を、荷電交換中性粒子測定から決定されたイオン温度に基づいて、ICRF加熱プラズマに対して調査した。垂直方向に加熱されたイオンの動径分布を、中性粒子エネルギー分析器(NPA)を用いて測定した。エネルギー閉じ込めを評価するために、ICRFパワー変調実験を実施した。その結果得られたイオン温度の時間変化を、荷電交換中性粒子と中心セルの反磁性から解析した。測定されたプラズマパラメータの動径分布に基づくイオンエネルギー収支の時間発展コードを開発し、イオン蓄積エネルギーの時間挙動を予測し、計算結果を測定値と比較した。

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Ion cyclotron heatingTandem mirror
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