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


Paper Publications

Laser-induced breakdown spectroscopy to monitor ion cyclotron range of frequency wall cleaning Li/D co-deposition in EAST tokamak

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Indexed by:期刊论文

Date of Publication:2017-05-01

Journal:FUSION ENGINEERING AND DESIGN

Included Journals:SCIE、EI

Volume:118

Page Number:98-103

ISSN No.:0920-3796

Key Words:Ambient gas; Magnetic field; LIBS; EAST; ICRF wall cleaning

Abstract:In this paper, laser-induced breakdown spectroscopy (LIBS) under magnetic field condition has been studied in laboratory and EAST tokamak. The experimental results reveal that in helium ambient gas, the magnetic field significantly enhances the LIBS signal intensity (similar to 3 times). The effect of time delay and laser fluence on the intensity of LIBS has been investigated for optimizing the signal to background ratio (S/B). The developed LIBS approach has been applied to monitor the cleaning performance of the first wall in the fusion device of EAST using the ion cyclotron range of frequency (ICRF). The experimental results demonstrate that the cleaning performance for Li/D co-deposition layer is effective under helium ambient gas. The removing rate of Li on the surface of W tile is faster than that on Mo tile in He-ICRF cleaning and the D/(D + H) ratio on Mo tile is higher by similar to 1.2 times than that on W tile. This work would indicate the feasibility of using LIBS to monitor the wall cleaning processes in EAST tokamak. (C) 2017 Elsevier B.V. All rights reserved.

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Next One:Enhancement of Laser-Induced Breakdown Spectroscopic Signals in a Liquid Jet with Glow Discharge

Profile

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。