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Analysis of divertor plasma in ohmically and neutral beam heated hydrogen discharges in JT-60

H. Yoshida, S. Niikura, K. Shimizu, T. Ando, H. Nakamura, T. Nishitani, K. Nagashima, JT-60 TEAM1988年被引用 3Nuclear FusionIF 3出版社

The characteristics of ohmically and high power neutral beam heated (PNBI ∼ 20 MW) hydrogen divertor plasmas in JT-60 are analysed on the basis of a plasma fluid model. The calculated radiation loss of the divertor plasma and the density dependence of the neutral pressure in the divertor chamber are qualitatively in good agreement with the experimental results. The divertor radiation loss in ohmically heated discharges can be explained by hydrogen line radiation and impurity radiation. The higher neutral pressure in neutral beam heated discharges can be explained by the decrease of the global particle confinement time in comparison with that in ohmically heated discharges.

日本語訳

オーム加熱および高パワー中性粒子ビーム加熱(PNBI ∼ 20 MW)されたJT-60の水素ダイバータプラズマの特性を、プラズマ流体モデルに基づいて解析した。計算されたダイバータプラズマの放射損失と、ダイバータ室内の中性粒子圧力の密度依存性は、実験結果と定性的に良好な一致を示した。オーム加熱放電におけるダイバータ放射損失は、水素線放射と不純物放射によって説明できる。中性粒子ビーム加熱放電におけるより高い中性粒子圧力は、オーム加熱放電と比較した場合の全体粒子閉じ込め時間の減少によって説明できる。

装置

jt-60sa高精度(タイトル一致)

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DivertorNeutral beamNeutral beam injectionOhmic heatingDivertor plasmaJT-60
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