Effects of ripple loss of fast ions on toroidal rotation in JT-60U
Effects of ripple loss of fast ions on toroidal rotation in JT-60U
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DOI：
10.1088/0741-3335/48/11/008
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发表时间：
2006-11
影响因子：
2.2
通讯作者：
M. Yoshida;Y. Koide;H. Takenaga;H. Urano;N. Oyama;K. Kamiya;Y. Sakamoto;Y. Kamada
中科院分区：
文献类型：
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作者：
M. Yoshida;Y. Koide;H. Takenaga;H. Urano;N. Oyama;K. Kamiya;Y. Sakamoto;Y. Kamada
在近垂直中性束（PERP-NB）注入的情况下，研究了JT-60U在与等离子体电流反平行方向，即反向（CTR）方向上的环面旋转驱动机制和动量输运。环形场波纹引起的快速离子损耗导致CTR在外围区域旋转，并且由于波纹损耗的减少，安装铁素体钢瓦后，perp - nb的CTR旋转幅度减小。考虑l模等离子体瞬态动量输运分析估计的扩散率和对流速度，可以用动量输运来解释核心区的环向旋转速度分布。
The driving mechanism of toroidal rotation and the momentum transport are studied on JT-60U in relation to the toroidal rotation in the direction antiparallel to the plasma current, i.e. counter (CTR) direction, with near-perpendicular neutral beam (PERP-NB) injection. Fast ion losses due to the toroidal field ripple induce CTR rotation in the peripheral region, and the magnitude of CTR rotation with PERP-NBs reduces by installing the ferritic steel tiles as a consequence of the reduction in the ripple losses. It is also found that toroidal rotation velocity profiles in the core region can be explained by momentum transport considering diffusivity and convective velocity estimated from transient momentum transport analysis in L-mode plasmas.