首页> 外文期刊>Nuclear fusion >Plasma cleaning of ITER edge Thomson scattering mock-up mirror in the EAST tokamak
【24h】

Plasma cleaning of ITER edge Thomson scattering mock-up mirror in the EAST tokamak

机译:在EAST托卡马克中对ITER边缘Thomson散射模型反射镜进行等离子体清洁

获取原文
获取原文并翻译 | 示例
           

摘要

First mirrors are the key element of all optical and laser diagnostics in ITER. Facing the plasma directly, the surface of the first mirrors could be sputtered by energetic particles or deposited with contaminants eroded from the first wall (tungsten and beryllium), which would result in the degradation of the reflectivity. The impurity deposits emphasize the necessity of the first mirror in situ cleaning for ITER. The mock-up first mirror system for ITER edge Thomson scattering diagnostics has been cleaned in EAST for the first time in a tokamak using radio frequency capacitively coupled plasma. The cleaning properties, namely the removal of contaminants and homogeneity of cleaning were investigated with molybdenum mirror insets (25 mm diameter) located at five positions over the mock-up plate (center to edge) on which 10nm of aluminum oxide, used as beryllium proxy, were deposited. The cleaning efficiency was evaluated using energy dispersive x-ray spectroscopy, reflectivity measurements and x-ray photoelectron spectroscopy. Using argon or neon plasma without magnetic field in the laboratory and with a 1.7 T magnetic field in the EAST tokamak, the aluminum oxide films were homogeneously removed. The full recovery of the mirrors' reflectivity was attained after cleaning in EAST with the magnetic field, and the cleaning efficiency was about 40 times higher than that without the magnetic field. All these results are promising for the plasma cleaning baseline scenario of ITER.
机译:第一面镜子是ITER中所有光学和激光诊断的关键要素。直接面对等离子体,第一反射镜的表面可能被高能粒子溅射或沉积有从第一壁(钨和铍)腐蚀掉的污染物,这将导致反射率下降。杂质沉积物强调了对ITER进行第一次镜面原位清洁的必要性。用于ITER边缘Thomson散射诊断的模拟第一镜系统已在EAST中首次使用射频电容耦合等离子体在托卡马克中进行了清洁。使用位于样板上方五个位置(中心到边缘)上的五个位置(直径为25毫米)的钼镜嵌片(直径25毫米)研究了清洁特性,即污染物的去除和清洁的均匀性,在该位置上10nm的氧化铝用作铍替代物,均已存入。使用能量色散X射线光谱学,反射率测量和X射线光电子能谱评价清洁效率。在实验室中使用无磁场的氩或氖等离子体,在EAST托卡马克中使用1.7 T磁场,均匀地除去了氧化铝膜。用磁场在EAST中清洗后,可以完全恢复反射镜的反射率,清洗效率是不使用磁场时的清洗效率的40倍左右。所有这些结果对于ITER的血浆清洁基线方案是有希望的。

著录项

  • 来源
    《Nuclear fusion》 |2018年第2期|026008.1-026008.8|共8页
  • 作者单位

    Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei Anhui 230031, People's Republic of China;

    Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland;

    Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei Anhui 230031, People's Republic of China,University of Science and Technology, Hefei 230029, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei Anhui 230031, People's Republic of China,University of Science and Technology, Hefei 230029, People's Republic of China;

    ITER Organization, Route de Vinon-sur-Verdon, CS 90 046, 13067 St Paul Lez Durance Cedex, France;

    ITER Organization, Route de Vinon-sur-Verdon, CS 90 046, 13067 St Paul Lez Durance Cedex, France;

    ITER Organization, Route de Vinon-sur-Verdon, CS 90 046, 13067 St Paul Lez Durance Cedex, France;

    Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei Anhui 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei Anhui 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei Anhui 230031, People's Republic of China,University of Science and Technology, Hefei 230029, People's Republic of China;

    Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland;

    Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland;

    Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei Anhui 230031, People's Republic of China;

    Institute of Plasma Physics, Chinese Academy of Sciences, P.O. Box 1126, Hefei Anhui 230031, People's Republic of China;

    Department of Physics, University of Basel, Klingelbergstrasse 82, CH-4056 Basel, Switzerland;

  • 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
  • 关键词

    first mirror; plasma cleaning; radio frequency; reflectivity;

    机译:第一面镜子等离子清洗;无线电频率;反射率;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号