Study of first mirror exposure and protection in HL-2A tokamak
Study of first mirror exposure and protection in HL-2A tokamak
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DOI：
10.1016/j.fusengdes.2006.07.030
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发表时间：
2006-11
影响因子：
1.7
通讯作者：
Y. Zhou;B. Gao;Y. Jiao;Z. Deng;Y. Tang;J. Yi;C. Tian;X. Ding;Yang Liu
中科院分区：
文献类型：
--
作者：
Y. Zhou;B. Gao;Y. Jiao;Z. Deng;Y. Tang;J. Yi;C. Tian;X. Ding;Yang Liu
玻璃和铜镜暴露在 HL-2A 真空室内。玻璃镜上发现电弧放电痕迹。测试镜的光学传输特性已被测量。通过AES分析，第一镜上沉积材料的主要成分是碳和铁。采用蒙特卡罗方法模拟了测试镜防护罩的防护效果。经过两年的托卡马克实验，可以发现铜镜的反射率比玻璃镜的反射率下降得慢。第一镜在辉光放电和壁处理过程中比欧姆放电更容易被污染。使用缓冲器和快门可以减轻污染，特别是在辉光放电和壁加工过程中。
Glass and copper mirrors were exposed inside the HL-2A vacuum chamber. Arc discharge mark has been found on the glass mirror. The optical transmission character of test mirrors has been measured. The main components of the deposited materials on the first mirror are carbon and iron analyzed by AES. The Monte-Carlo method has been used to simulate the defending effect of the shield for test mirror. After a 2 years tokamak experiment, one can find that the reflectivity of copper mirror decline slower than that of glass mirror. The first mirror is polluted easier during glow discharge and wall processing than omhic discharge. Using buffer and shutter can play down the pollution, especially during the glow discharge and wall processing.