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Characterization of MHD activity and its influence on radiation asymmetries during massive gas injection in DIII-D

D. Shiraki, N. Commaux, L.R. Baylor, N.W. Eidietis, E.M. Hollmann, V.A. Izzo, R.A. Moyer, C. Paz-Soldan2015年被引用 25Nuclear FusionIF 3出版社

Measurements from the DIII-D tokamak show that toroidal radiation asymmetries during fast shutdown by massive gas injection (MGI) are largely driven by magnetohydrodynamic modes during the thermal quench. The phenomenology of these modes, which are driven unstable by profile changes as the thermal energy is quenched, is described based on detailed magnetic measurements. The toroidal evolution of the dominantly perturbation is understood to be a function of three parameters: the location of the MGI port, pre-MGI plasma rotation, and error fields. The resulting level of radiation asymmetry in these DIII-D plasmas is modest, with a toroidal peaking factor (TPF) of for the total thermal quench energy and for the peak radiated power, both of which are below the estimated limit for ITER (TPF 2) (Sugihara et al 2007 Nucl. Fusion47 337).

日本語訳

DIII-Dトカマクからの測定により、大量ガス入射(MGI)による高速停止中のトロイダル方向の放射非対称性は、主に熱クエンチ中の磁気流体力学モードによって駆動されることが示されている。熱エネルギーがクエンチされる際にプロファイル変化によって不安定化されるこれらのモードの現象論は、詳細な磁気測定に基づいて記述される。主としてn=1の摂動のトロイダル方向の時間発展は、MGIポートの位置、MGI前のプラズマ回転、および誤差磁場の3つのパラメータの関数として理解される。これらのDIII-Dプラズマにおける放射非対称性のレベルは穏やかであり、全熱クエンチエネルギーに対するトロイダルピーキング係数(TPF)は[値]、ピーク放射パワーに対するTPFは[値]であり、いずれもITERの推定限界値(TPF = 2)(Sugihara et al 2007 Nucl. Fusion47 337)を下回っている。

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diii-d高精度(タイトル一致)iter低精度(概要文一致)

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MagnetohydrodynamicsDIII-DMassive gas injection
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