Optimization of Lower Hybrid Current Drive Efficiency for EAST Plasma with Non-Circular Cross Section and Finite Aspect-Ratio

The two-dimensional equilibrium with flexible boundaries is solved via using a MAT- LAB Equilibrium Code （MEC）, which has applied the finite element method to handle the change- able plasma shape and employed the trust-region dogleg method to solve the nonlinear partial dif- ferential equation. The...

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Bibliographic Details
Published in:Plasma science & technology 2012-03, Vol.14 (3), p.215-221
Main Author: 侍行剑 胡业民 高喆
Format: Article
Language:English
Subjects:
优化
低杂波电流驱动
宽高比
有限元方法
电流驱动效率
等离子体约束
超导托卡马克
非圆截面
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Summary:The two-dimensional equilibrium with flexible boundaries is solved via using a MAT- LAB Equilibrium Code （MEC）, which has applied the finite element method to handle the change- able plasma shape and employed the trust-region dogleg method to solve the nonlinear partial dif- ferential equation. The corresponding driven current profile is also calculated by coupling with the lower-hybrid simulation code （LSC）. The results are applied to optimize the lower hybrid current drive （LHCD） efficiency for the Experimental Advanced Superconductor Tokamak （EAST） and suggested that both elongation and triangularity have a notable effect on the efficiency because of the competition between the increase in the resonant area and in the Shafranov shift. Moreover, large aspect-ratio has a negative effect on the efficiency. These effects are studied numerically, which might be considered carefully for both good plasma confinement and high LHCD efficiency.
ISSN:1009-0630
DOI:10.1088/1009-0630/14/3/06