EBW-Bootstrap Current Synergy in the National Spherical Torus Experiment (NSTX) | |
Harvey, R.W. ; Taylor, G. | |
Princeton University. Plasma Physics Laboratory. | |
关键词: Bootstrap Current; Wave Interaction, Plasma; Bootstrap Model; 70 Plasma Physics And Fusion Technology; Tokamaks, Nstx; | |
DOI : 10.2172/836632 RP-ID : PPPL-4048 RP-ID : AC02-76CH03073 RP-ID : 836632 |
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美国|英语 | |
来源: UNT Digital Library | |
【 摘 要 】
Current driven by electron Bernstein waves (EBW) and by the electron bootstrap effect are calculated separately and concurrently with a kinetic code, to determine the degree of synergy between them. A target {beta} = 40% NSTX plasma is examined. A simple bootstrap model in the CQL3D Fokker-Planck code is used in these studies: the transiting electron distributions are connected in velocity-space at the trapped-passing boundary to trapped-electron distributions which are displaced radially by a half-banana width outwards/inwards for the co-/counter-passing regions. This model agrees well with standard bootstrap current calculations, over the outer 60% of the plasma radius. Relatively small synergy net bootstrap current is obtained for EBW power up to 4 MW. Locally, bootstrap current density increases in proportion to increased plasma pressure, and this effect can significantly affect the radial profile of driven current.
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