Ran Hai
Associate Professor Supervisor of Doctorate Candidates Supervisor of Master's Candidates
Gender:Male
Alma Mater:大连理工大学
Degree:Doctoral Degree
School/Department:物理学院
Discipline:Plasma physics
E-Mail:rhai@dlut.edu.cn
Hits:
Indexed by:期刊论文
Date of Publication:2014-10-01
Journal:FUSION ENGINEERING AND DESIGN
Included Journals:SCIE、EI
Volume:89
Issue:9-10
Page Number:2435-2439
ISSN No.:0920-3796
Key Words:DP-LIBS; Vacuum; Tokamak; PFC; EAST
Abstract:Our recent investigations have indicated the potential of double-pulse laser-induced breakdown spectroscopy (DP-LIBS) for analysis of the deposited impurity on divertor tiles in the experimental advanced superconducting tokamak (EAST). The collinear DP-LIBS configuration was suggested with the aim of overcoming the sensitivity shortcomings of the conventional single pulse laser-induced breakdown spectroscopy (SP-LIBS) technique in vacuum conditions. A systematic study of plasma emission signal dependence on the inter-pulse delay at 3.5 x 10(-3) Pa was performed, and the results were compared with the ones obtained with a single laser pulse of energy corresponding to the sum of the two pulses. For a molybdenum tile, it was found that the atomic spectral lines of Mo were enhanced by a factor of 6.5 when an inter-delay time of 1.5 mu s was installed. For an exposed divertor tile, significant increases in the emission line intensities of various minor elements (such as Mo, Si, Fe, Cr, Ti, Ni and Ca) were observed in DP-LIBS, while no spectra signal was achieved in SP-LIBS. This collinear DP-LIBS technique would help us to develop a more promising system to monitor the fuel retention and impurity deposition on plasma facing components of EAST. (C) 2014 Elsevier B.V. All rights reserved.
Pre One:Effect of parameter setting and spectral normalization approach on study of matrix effect by laser induced breakdown spectroscopy of Ag–Zn binary composites
Next One:In situ diagnosis of Li-wall conditioning and H/D co-deposition on the first wall of EAST using laser-induced breakdown spectroscopy
海然，副教授，博士生导师，国家重点研发计划-青年项目负责人，大连市高端人才，大连市青年科技之星。博士毕业于大连理工大学等离子体物理专业。2014-2016年公派美国加州大学伯克利分校-劳伦斯伯克利国家实验室进行博士联合培养。
主要从事等离子体诊断、等离子体与材料相互作用，和工业、环境领域先进激光光谱技术开发及应用研究。近年来，重点针对磁约束核聚变装置运行极端环境，发展了壁材料元素、结构、服役性能的激光光谱诊断新技术，实现了远程、在线、定量化分析的目标。在Optics express, Journal of Analytical Atomic Spectrometry, Spectrochimica Acta Part B:Atomic Spectroscopy等国外核心杂志发表SCI论文60余篇，一作一区封面论文3篇，已授权发明专利12项；承担国家及省部级科研项目4项，参与重大科研项目多项，是我校牵头的国家重大ITER专项的研究骨干成员。
