Effects of fast ions produced by ICRF heating on the pressure at EAST
Effects of fast ions produced by ICRF heating on the pressure at EAST
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DOI：
10.1088/2058-6272/ab4ff5
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发表时间：
2020-02
影响因子：
1.7
通讯作者：
Zhen Zheng;N. Xiang;Cheng Yang;Yingfeng Xu
中科院分区：
文献类型：
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作者：
Zhen Zheng;N. Xiang;Cheng Yang;Yingfeng Xu
离子回旋共振加热是EAST上一种重要的辅助加热方法，它可以产生快离子。为了分析ICRH诱导快离子对EAST等离子体压强的影响，采用TRANSP和TORIC程序进行了模拟计算。研究发现，当ICRF功率足够高时，ICRF引起的快离子压力不容忽视。当输入功率大于3MW时，总离子压的大小可以提高到总离子压的60%。改变谐振层的厚度，压力分布也会发生明显的变化。结果表明，通过改变波的频率和天线的位置，可以展宽离子总压剖面，这可能为EAST的剖面控制提供一种选择。
ICRH is an important auxiliary heating method on EAST, which can produce fast ions. To analyze the effect of ICRH–induced fast ions on the plasma pressure of EAST, the simulations are performed by using TRANSP and TORIC codes. It is found that the ICRF induced fast-ion pressure cannot be negligible when the ICRF power is sufficiently high. The magnitude of the total ion pressure can be raised up to 60% of the total pressure as the input power is above 3 MW. And the pressure profile is also significantly modified when the resonant layer is changed. It is shown that by changing the wave frequency and antenna position, the total ion pressure profile can be broadened, which might provide an option for profile control on EAST.