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Edge power deposition reduction in a tokamak by replacing the Faraday screen on an RF antenna with an insulator

机译：通过用绝缘子代替RF天线上的法拉第屏，减少托卡马克中的边缘功率沉积

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摘要

Calculations show that the power coupled to the regions around the RF antenna (side, front and interior) due to the edge plasma interaction with voltages induced on the antenna structure of the Phaedrus-T tokamak was reduced from nearly 11 kW to a few hundred watts for 40 kW of RF input power by replacing the Faraday screen (FS) surrounding the antenna with insulating boron nitride (BN) side limiters. When an FS was on the antenna, calculations show that 7.7 kW of the power coupled to the edge was transferred to the electrons that passed through a potential gradient while crossing field lines and 3 kW was dissipated by ions falling through an increased sheath at the carbon limiter and FS. Experimental data of edge plasma parameters, loading resistance and intensity of VUV impurity light support the conclusion that less power was deposited in the edge plasma when the antenna had only BN side limiters than when it was covered with an FS.
机译：计算表明，由于边缘等离子体与Phaedrus-T托卡马克天线结构上感应的电压相互作用，耦合到RF天线周围区域（侧面，正面和内部）的功率从近11 kW减小到几百瓦通过用绝缘氮化硼（BN）侧限制器代替天线周围的法拉第屏蔽（FS），可实现40 kW的RF输入功率。当天线上有FS时，计算结果表明，与边缘耦合的7.7 kW功率被转移到通过电势梯度的电子，而电子穿过相交线时穿过电势梯度，而3 kW的离子因穿过碳层上增加的护套掉落的离子而耗散限制器和FS。边缘等离子参数，负载电阻和VUV杂质光强度的实验数据支持以下结论：当天线仅具有BN侧限制器时，比在FS覆盖时，在边缘等离子中沉积的功率更少。

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  • 来源
    《Nuclear fusion》 |1996年第2期|p. 173-190|共18页
  • 作者

    J. Sorensen; D. A. Diebold; R. Majeski; N. Hershkowitz;

  • 作者单位

    Space Science Laboratory, NASA/NRC Research Associate, Marshall Space Flight Center, Huntsville, Alabama, USA;

    Department of Nuclear Engineering and Engineering Physics, University of Wisconsin, Madison, Wisconsin, United States of America;

    Princeton Plasma Physics Laboratory, Princeton University, Princeton, NJ, USA;

    Department of Nuclear Engineering and Engineering Physics, University of Wisconsin, Madison, Wisconsin, United States of America;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 原子核物理学、高能物理学;
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