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H-mode threshold power in TCV Ohmic plasmas

Y R Martin, TCV team2002年Plasma Physics and Controlled FusionIF 2.2出版社

L-mode to H-mode (LH) transitions are observed in a large variety of plasma conditions in TCV Ohmic plasmas. The power flowing through the separatrix at the LH transition differs by up to a factor of two from the predicted H-mode threshold power. Variations in this deviation are due to the large operational domain covered by the transitions as well as from the different scenarios identified to access the H-mode regime. LH transitions obtained during the plasma current ramp at low plasma current, elongation and triangularity have a threshold power below the standard expression while transitions at high current and triangularity or during the stationary phase of the discharge have a threshold power above the standard expression.

日本語訳

LモードからHモードへの遷移(LH遷移)は、TCVオーミックプラズマにおける多種多様なプラズマ条件で観測される。セパラトリックスを通過する電力は、LH遷移時において、予測されるHモード閾値電力と最大2倍の差がある。この偏差は、遷移が観測された広範な運転領域と、Hモード領域に到達するために特定された異なるシナリオによるものである。プラズマ電流の立ち上げ中、低いプラズマ電流、低い伸長度、低い三角形度で得られたLH遷移は、標準式による閾値電力よりも低い閾値電力を示す一方、高い電流、高い三角形度、または放電の定常位相中の遷移は、標準式による閾値電力よりも高い閾値電力を示す。

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H-modeTCVOhmic heating
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