基于离线激光诱导击穿光谱方法的HL-2A石墨瓦沉积层初步分析  

Analyzing the deposition layer on the carbon tiles of HL-2A with laser-induced breakdown spectroscopy

作　　者：王振忠 才来中[1] 刘平 刘佳敏 Imran Muhammad 丁洪斌[2] WANG Zhen-zhong;CAI Lai-zhongl;LIU Ping;LIU Jia-min;Imran Muhammad;DING Hong-bin(Southwestern Institute of Physics, Chengdu 610041;Dalian University of Technology, Dalian 116024)

机构地区：[1]核工业西南物理研究院,成都610041 [2]大连理工大学物理与光电工程学院三束材料改性教育部重点实验室,大连116024

出　　处：《核聚变与等离子体物理》2018年第2期170-176,共7页Nuclear Fusion and Plasma Physics

基　　金：国家磁约束核聚变能发展研究专项(2015GB106001);四川省科技厅国际合作重点项目(2016HH0006)

摘　　要：对HL-2A偏滤器靶板和固定孔栏位置的石墨瓦进行了离线激光诱导击穿光谱(LIBS)测量,比较分析了沉积行为,初步得到了不同位置沉积层粒子种类(Fe、Si、H、D等元素)及其深度的变化。与飞行时间二次离子质谱仪(TOF-SIMS)所得结果进行了对比,发现离子深度变化形貌趋同。根据沉积层有效信号激光数,得到激光烧蚀速率约为270nm/脉冲。The graphite tiles, located at the lower divertor and the fixed limiter of HL-2 A tokamak, were measured with ex-situ laser-induced breakdown spectroscopy（LIBS）. The deposition behavior on HL-2 A was presented by analyzing different elements including C, Fe, Si, H and D within the tiles and their distributions on depth in different tiles. Comparing with the results obtained with time of flight secondary ion mass spectrometry（TOF-SIMS）, the depth profiles show well consistency. According to the effective number of deposition layer erased by the laser, the average laser ablation rate is estimated to be 270 nm/pulse.

关 键 词：激光诱导击穿光谱 石墨 HL-2A偏滤器 等离子体与材料相互作用 

分 类 号：TL62[核科学技术—核技术及应用]