RF-Plasma Edge Interactions and their Impact on ICRF Antenna Performance in Alcator C-Mod
RF-Plasma Edge Interactions and their Impact on ICRF Antenna Performance in Alcator C-Mod
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DOI：
10.1016/j.jnucmat.2007.01.273
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发表时间：
2007-06
影响因子：
3.1
通讯作者：
S. Wukitch;B. Lipschultz;E. Marmar;Yu-Ming Lin;A. Parisot;M. Reinke;J. Rice;J. Terry
中科院分区：
文献类型：
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作者：
S. Wukitch;B. Lipschultz;E. Marmar;Yu-Ming Lin;A. Parisot;M. Reinke;J. Rice;J. Terry
在Alcator C-Mod中，我们研究了高功率离子回旋加速器频率范围天线与高性能等离子体和所有高Z等离子体面对组件的兼容性，为ITER等未来设备提供操作信息。硼化似乎是实现低辐射功率等离子体的关键，但它可以很快被侵蚀，特别是在ICRF的存在下。在这里，我们提出的间接证据表明，从天线连接到外部偏滤器顶部的通量管上的射频增强鞘是最有可能的侵蚀机制。此外，发现没有法拉第屏的天线操作通过增加的杂质源而降低天线性能。
In Alcator C-Mod, we have investigated the compatibility of high power ion cyclotron range of frequencies antenna with high performance plasmas and all high-Z plasma facing components, to provide operational information for future devices such as ITER. Boronization appears to be critical achieving low radiated power plasmas but it can be quickly eroded particularly in the presence of ICRF. Here we present circumstantial evidence that suggests RF-enhanced sheaths on flux tubes connected from the antennas to the top of the outer divertor are the most likely erosion mechanism. In addition, antenna operation without a Faraday screen was found to degrade antenna performance through increased impurity sources.