Correlation between Spatial Structure of Alfv6n Eigenmodes and Anoma lous Transport of Fast Ions

研究了高能中性束加热LHD等离子体中环形诱导Alfven本征模对能量离子输运的影响。观察到TAE诱导的快离子损失。损耗随TAE波动幅度的增大而增大。所观察到的TAE引起的快离子损失相对于TAE波动幅度的依赖性表明，磁轴的向外偏移增加了由TAE引起的异常快离子损失。这可能是由于外移等离子体中通量面的轨道偏移增加和TAE空间分布的扩展所致。

Effects of toroidicity-induced Alfven eigenmodes on energetic-ion transport have been investigated in LHD plasmas heated by high-energy neutral beam injection. TAE-induced fast-ion losses were observed. The losses increase as the TAE fluctuation amplitude increases. The dependence of the observed TAE-induced fast-ion loss with respect to TAE fluctuation amplitude indicates that outward shift of a magnetic axis increases the anomalous fast-ion loss caused by TAE. This is supposed to be due to increase of orbit shift from flux surfaces and expansion of spatial distribution of TAEs in outward shifted plasmas.