Influence of asymmetric energetic ion distributions on sawtooth stabilization

被引：50

作者：

Graves, JP ^{[1
]}

机构：

[1] Ecole Polytech Fed Lausanne, Assoc EURATOM Confederat Suisse, Ctr Rech Phys Plasmas, CH-1015 Lausanne, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 92卷 / 18期

关键词：

D O I：

10.1103/PhysRevLett.92.185003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effect of energetic asymmetrically distributed ions on the stability of the internal kink mode in tokamaks is analyzed. Circulating ions which intersect the resonant surface due to finite radial excursion contribute to the mode either in the region of favorable or unfavorable curvature depending on the sign of v(parallel to). Internal kink mode stabilization for predominantly cocirculating ion populations is consistent with the observation of long sawteeth using tangential coinjection of neutral beams in JT-60U [G. J. Kramer et al., Nucl. Fusion 40, 1383 (2000)]. Off-axis neutral beam heating emerges as a possible means of assisting sawtooth control in future fusion grade experiments.

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页码：185003 / 1

页数：4

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