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Vertical poloidal asymmetries of low-Z element radiation in the PDX tokamak

K. Brau, S. Suckewer, S.K. Wong1983年被引用 37Nuclear FusionIF 3出版社

Vertical poloidal asymmetries of hydrogen isotopes and low-Z impurity radiation in the PDX tokamak may be caused by poloidally asymmetric sources of these elements at gas inlet valves, limiters or vacuum vessel walls, asymmetric magnetic-field geometry in the region beyond the plasma boundary, or by ion curvature drifts. Low ionization states of carbon (C II to C IV) are more easily affected by edge conditions than is C V. Vertical poloidal asymmetries of C V are correlated with the direction of the toroidal field. The magnitude of the asymmetry agrees with the predictions of a quasi-fluid neoclassical model. Experimental data and numerical simulations are presented to investigate different models of impurity poloidal asymmetries.

日本語訳

PDXトカマクにおける水素同位体および低Z不純物放射のポロイダル方向の上下非対称性は、ガス入射弁、リミター、あるいは真空容器壁におけるこれらの元素のポロイダル方向に非対称な供給源、プラズマ境界領域外の磁場幾何学の非対称性、あるいはイオン曲率ドリフトによって引き起こされる可能性がある。炭素の低電離状態(C IIからC IV)は、C Vよりも周辺プラズマ条件の影響を受けやすい。C Vのポロイダル方向の上下非対称性は、トロイダル磁場の方向と相関がある。この非対称性の大きさは、準新古典モデルの予測と一致する。異なる不純物ポロイダル非対称性モデルを検証するために、実験データと数値シミュレーションの結果を示す。

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