|
个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：Professor Dr. Hongbin Ding
其他任职：物理学院学术委员会主任，等离子体联合研究中心主任,中国光学工程学会LIBS专委会副主任, 中国核学会核聚变等离子体分会常务理事，辽宁省物理学会副理事长，国际ITER-ITPA 委员
性别：男
毕业院校：巴塞尔大学
学位：博士
所在单位：物理学院
学科：等离子体物理. 光学工程
联系方式：hding@dlut.edu.cn
电子邮箱：hding@dlut.edu.cn
Effect of background gases at reduced pressures on the laser treated surface morphology, spectral emission and characteristics parameters of laser produced Mo plasmas
点击次数：
论文类型：期刊论文
发表时间：2013-07-01
发表刊物：JOURNAL OF NUCLEAR MATERIALS
收录刊物：SCIE、EI
卷号：438
期号：1-3
页面范围：183-189
ISSN号：0022-3115
摘要：Molybdenum owing to its high melting point and high reflectivity over a broad range of wavelengths has been used as first mirrors in EAST and HL-2A tokomaks and is also a candidate material for ITER mirrors. The effect of atmospheric conditions of Ar, N-2 and He at reduced pressure (2.0 x 10(-4) to 5 mbar) on the physical processes of the atomic and background emission, mass ablation, electron density and temperature of a laser produced Mo plasma has been investigated in order to adapt Laser Induced Breakdown Spectroscopy (LIBS) for in situ diagnostic and cleaning of the first mirrors. The obtained results strongly indicate that pressure and physical properties of the background gases play a crucial role to interpret the emission (line and continuum background) and characteristic parameters (electron density and temperature) of the plasma. The plasma shielding effect was found less pronounced for He environment and it leads to enhancement of the material evaporation from the target surface. (C) 2013 Elsevier B.V. All rights reserved.