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Pellet fuelling into radiative improved confinement discharges in TEXTOR-94

J. Hobirk, A.M. Messiaen, K.H. Finken, J. Ongena, M. Brix, R. Jaspers, H.R. Koslowski, A. Krämer-Flecken, G. Mank, J. Rapp2000年被引用 6Nuclear FusionIF 3出版社

Normally pellet injection in strongly heated discharges leads at most to a relatively short improvement of the energy and particle confinement times. In contrast to this finding, the radiative improved (RI) mode plasma of TEXTOR-94 is a very well suited target for pellet injection: the interaction of a pellet with the high density plasma together with the radiatively cooled edge leads in the best cases to an improved energy confinement time which lasts to the end of the heating phase. The pellet injection causes at first a density increase; this phase is followed by a quick partial particle loss and later an increase to a quasi-stationary value. Because of the linear density dependence of RI mode confinement this leads to an additional increase in energy confinement time.

日本語訳

通常、強力な加熱を受けた放電におけるペレット入射は、せいぜいエネルギー閉じ込め時間と粒子閉じ込め時間の比較的短い改善をもたらすに過ぎない。この知見とは対照的に、TEXTOR-94の放射強化(RI)モードプラズマはペレット入射に非常に適した対象である。すなわち、高密度プラズマとペレットとの相互作用は、放射冷却された周辺部と相まって、最良の場合には加熱位相の終了まで持続するエネルギー閉じ込め時間の改善をもたらす。ペレット入射はまず密度の増加を引き起こす。この段階に続いて、粒子の部分的な損失が急速に生じ、その後、粒子密度は準定常値まで増加する。RIモード閉じ込めの密度に対する線形依存性により、これはエネルギー閉じ込め時間の更なる増加をもたらす。

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