Abstract It is shown that for the ideal internal kink mode of tokamak plasma, there exists a critical magnetic shear s0c for its excitation when the finite ion Larmor radius effect is considered in the mode singular layer. This can be related to the sudden onset of the sawtooth and also to the stabilization of the sawtooth by the trapped hot ions observed experimentally. The alpha particle effect on this mode is revisited and some new results are reported.
Received: 05 September 1999
Revised: 14 February 2000
Accepted manuscript online:
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 19705004).
Cite this article:
Shi Bing-ren (石秉仁), Long Yong-xing (龙永兴), Sui Guo-fang (隋国芳), Li Ji-quan (李继全) CRITICAL MAGNETIC SHEAR FOR THE TOKAMAK IDEAL INTERNAL KINK MODE IN THE ION KINETIC REGIME 2000 Chinese Physics 9 523
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