Discrete Alfvén eigenmodes in international thermonuclear experimental reactor operations with negative magnetic shear

doi:10.1088/1674-1056/19/9/095202

Abstract Discrete Alfvén eigenmodes in steady-state operation scenarios with negative magnetic shear in the international thermonuclear experimental reactor are investigated in this paper. These magnetohydrodynamic eigenmodes are trapped by the $\alpha$ -induced potential wells along the magnetic field line. Here $\alpha=-q^2R{\rm d}\beta/{\rm d}r$ with q being the safety factor, $\beta$ the ratio between plasma and magnetic pressures, and R the major radius, and r the minor radius. Due to negligible continuum damping via wave energy tunneling, these Alfvén eigenmodes could be readily destabilized by energetic particles.

Keywords: Alfvén eigenmodes negative magnetic shear magnetohydrodynamic instability

Received: 18 December 2009
Revised: 19 February 2010
Accepted manuscript online:

PACS:	5235B
	5255G
	5235P

Fund: Project supported by the National Natural Science Foundation of China (Grant No. 10675037).

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Wang Jun(王军), Hu Shuang-Hui(胡双辉), Dai Qing-Ping(代清平), and Yao Long-Bao(姚龙宝) Discrete Alfvén eigenmodes in international thermonuclear experimental reactor operations with negative magnetic shear 2010 Chin. Phys. B 19 095202

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Discrete Alfvén eigenmodes in international thermonuclear experimental reactor operations with negative magnetic shear

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