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Study of neutral-hydrogen-sensitive variations in C V line ratios of the TJ-I tokamak

K.J McCarthy, B Zurro1997年Fusion Engineering and DesignIF 1.7出版社

AbstractIt has been shown previously that charge exchange that involves slow collisions between hydrogen-like carbon and neutral hydrogen are responsible for variations in the intensity ratio between the helium-like carbon triplet lines, 1s2s3S1−1s2p3P2 (2271.59 Å) and 1s2s3S1-1s2p3P0,1 (227.841 nn), which were seen in line-of-sight measurements across the TJ-I tokamak. We compare how this process may cause anomalies in the associated intercombination to the resonance line ratio G, and we shown how line-of-sight measurements across a plasma radius and the equations developed here may be used to estimate the plasma neutral concentration. Finally, we estimate the sensitivities of these line ratios to the neutral density for tokamak plasmas.

日本語訳

これまでに、水素様炭素と中性水素との間の低速衝突を伴う電荷交換が、TJ-Iトカマクを横切る視線方向測定において観測されたヘリウム様炭素三重項線、1s2s3S1−1s2p3P2(2271.59 Å)および1s2s3S1-1s2p3P0,1(227.841 nn)の間の強度比の変動の原因であることが示されている。我々は、この過程が関連するインターコンビネーション線と共鳴線の比Gに異常を引き起こし得る仕組みを比較検討し、プラズマ半径にわたる視線方向測定とここで導出した方程式がプラズマ中性粒子濃度の推定にどのように使用され得るかを示す。最後に、トカマクプラズマにおけるこれら線比の中性粒子密度に対する感度を評価する。

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