Investigation of edge pedestal structure in DIII-D (DoE Grant ER54538)
Investigation of edge pedestal structure in DIII-D (DoE Grant ER54538)
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DOI：
10.1063/1.2167310
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发表时间：
2005-10
影响因子：
6.7
通讯作者：
W. Stacey;R. Groebner
中科院分区：
文献类型：
--
作者：
W. Stacey;R. Groebner
A calculation based on the requirements of particle, momentum and energy conservation, conductive heat transport, and atomic physics resulting from a recycling and fueling neutral influx was employed to investigate the experimental density, temperature, rotation velocities, and radial electric field profiles in the edge of three DIII-D [J. Luxon, Nucl. Fusion 42, 614 (2002)] high-confinement-mode plasmas. The calculation indicated that the cause of the pedestal structure in the density was a momentum balance requirement for a steep negative pressure gradient to balance the forces associated with an edge peaking in the inward pinch velocity (caused by the observed edge peaking in the radial electric field and rotation velocity profiles) and, to a lesser extent, in the outward radial particle flux (caused by the ionization of recycling neutrals). Thermal and angular momentum transport coefficients were inferred from experiment and compared with theoretical predictions, indicating that thermal transport coef...
