Response of toroidal rotation velocity to electron cyclotron wave injection in JT-60U
Response of toroidal rotation velocity to electron cyclotron wave injection in JT-60U
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DOI：
10.1088/0741-3335/48/5a/s05
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发表时间：
2006-05
影响因子：
2.2
通讯作者：
Y. Sakamoto;S. Ide;M. Yoshida;Y. Koide;T. Fujita;H. Takenaga;Y. Kamada
中科院分区：
文献类型：
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作者：
Y. Sakamoto;S. Ide;M. Yoshida;Y. Koide;T. Fujita;H. Takenaga;Y. Kamada
本文研究了JT-60 U等离子体中无或低直接环动量输入，特别是电子回旋（EC）波注入时的自发环旋转速度。结果表明，在L模等离子体中，环向旋转速度对中心EC注入的响应是朝着并流方向的。环向旋转速度的变化区域比EC沉积轮廓更宽，并且与电子温度的变化区域相似。在EC和低杂波的联合加热中观察到的同向旋转速度随着储能的增加而增加，并且在强同向旋转等离子体中形成了大的正径向电场。此外，短脉冲离轴EC注入实验表明，对同方向的扰动的环形旋转速度传播到中心，其振幅的增加，这表明在动量传输向内箍缩。
The spontaneous toroidal rotation velocity under the no/low direct toroidal momentum input, particularly from the electron cyclotron (EC) wave injection has been investigated in JT-60U plasmas. It is found that the response of toroidal rotation velocity to the central EC injection is towards the co-current direction in L-mode plasma. The region of the change in the toroidal rotation velocity is wider than the EC deposition profile and similar to that in electron temperature. The observed co-rotation velocity in the combined heating of EC and lower hybrid wave increases with the increase in the stored energy and a large positive radial electric field is formed in the strong co-rotating plasma. Furthermore the short pulse off-axis EC injection experiment shows that the perturbation of the toroidal rotation velocity towards the co-direction propagates to the centre with increase in its amplitude, suggesting an inward pinch in momentum transport.