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Appearance of a low-frequency turbulence feature during saturatedohmic confinement plasma discharges

C L Rettig, G M Staebler, T L Rhodes, E J Doyle, W A Peebles, K H Burrell2001年Plasma Physics and Controlled FusionIF 2.2出版社

A low-frequency turbulence feature appears in high-density ohmicallyheated plasma discharges in the DIII-D tokamak in which the iontemperature gradient (ITG) mode is predicted to be unstable. The featureis observed only when the density is greater than the linear ohmicconfinement saturation density. Gyrokinetic stability calculationsindicate that the ITG mode frequency is comparable to the measuredfrequency, the wavenumber measured is comparable to that predicted for theITG mode, and the linear growth rate is significantly greater in thehigh-density regime.

日本語訳

DIII-Dトカマクにおける高密度オーム加熱プラズマ放電では、イオン温度勾配(ITG)モードが不安定であると予測される乱流特性が現れる。この特性は、密度が線形オーム加熱閉じ込め飽和密度よりも高い場合にのみ観測される。ジャイロ運動論的安定性計算によれば、ITGモードの周波数は測定周波数と同等であり、波数はITGモードについて予測された値と同等であり、線形成長率は高密度領域において有意に大きい。

装置

diii-d中精度(概要文一致)

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Ohmic heating
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