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Scalings and plasma profile parameterization of ASDEX high density Ohmic discharges

P.J. McCarthy, K.S. Riedel, O.J.W.F. Kardaun, H.D. Murmann, K. Lackner, ASDEX Team1991年被引用 14Nuclear FusionIF 3出版社

A database of high density (0.3 < e[1020 m−3] < 0.8), low qa(1.9 < qa < 3.4), Ohmic discharges from the ASDEX experiment is analysed statistically. Bulk parameter scalings and parameterized temperature and density profile shapes are presented. The total plasma kinetic energy, assuming Ti = Te, scales as e0.54±0.01 IpO.90±0.04 and is almost independent of the toroidal magnetic field. The electron temperature profile peaking factor scales as T03/2/(T3/2) = 0.94(± 0.04)qa1.07±0.04, in close agreement with the assumption of classical resistive equilibrium. In the inner half of the plasma, the inverse fall-off length for both temperature and density has a strong dependence on qa, with the temperature dependence being more pronounced. Outside the half-radius, the qa dependence disappears, but the density profile broadens near the edge with increasing plasma current. A second database of moderate density, moderate qa discharges (0.2 < e/[1020 m−3] < 0.4, 2.4 < qa < 4.2), is presented for comparison.

日本語訳

高密度(0.3 < e[10^20 m^−3] < 0.8)、低qa(1.9 < qa < 3.4)のASDEX実験からのオーミック放電のデータベースを統計的に解析する。バルクパラメータのスケーリング則と、パラメータ化された温度・密度分布形状を示す。Ti = Teを仮定した場合の全プラズマ運動エネルギーは、e^0.54±0.01 Ip^0.90±0.04 に比例し、トロイダル磁場にはほぼ依存しない。電子温度分布のピーキング係数は、T0^3/2/(T^3/2) = 0.94(± 0.04)qa^1.07±0.04 とスケーリングし、古典的抵抗平衡の仮定とよく一致する。プラズマの内側半分では、温度と密度の両方について逆減衰長がqaに強く依存し、温度依存性の方がより顕著である。半半径の外側ではqa依存性は消失するが、プラズマ電流の増加に伴い端付近で密度分布は広がる。比較のため、中程度の密度・中程度のqaの放電(0.2 < e/[10^20 m^−3] < 0.4、2.4 < qa < 4.2)の第2のデータベースも提示する。

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