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High performance H mode plasmas at densities abovethe Greenwald limit

M.A. Mahdavi, T.H. Osborne, A.W. Leonard, M.S. Chu, E.J. Doyle, M.E. Fenstermacher, G.R. McKee, G.M. Staebler, T.W. Petrie, M.R. Wade2002年被引用 54Nuclear FusionIF 3出版社

Densities of up to 40% above the Greenwald limit are reproducibly achieved in high confinement (HITER89P = 2) ELMing H mode discharges. Simultaneous gas fuelling and divertor pumping were used to obtain these results. Confinement of these discharges, similar to moderate density H mode, is characterized by a stiff temperature profile, and is therefore sensitive to the density profile. A particle transport model is presented that explains the roles of divertor pumping and geometry for access to high densities. The energy loss per ELM at high density is a factor of five lower than the predictions of an earlier scaling, based on data from lower density discharges.

日本語訳

Greenwald限界の40%までの密度が、高閉じ込め(HITER89P = 2)ELMing Hモード放電において再現可能に達成される。これらの結果を得るために、同時ガス入射とダイバータ排気が用いられた。これらの放電の閉じ込めは、中程度の密度のHモードと同様に、剛直な温度プロファイルによって特徴づけられ、したがって密度プロファイルに敏感である。高密度へのアクセスにおけるダイバータ排気と幾何学の役割を説明する粒子輸送モデルが提示される。高密度でのELMあたりのエネルギー損失は、より低密度の放電からのデータに基づく以前のスケーリングの予測よりも5倍低い。

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