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
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Indexed by:期刊论文
Date of Publication:2018-07-01
Journal:PLASMA CHEMISTRY AND PLASMA PROCESSING
Included Journals:SCIE
Volume:38
Issue:4,SI
Page Number:803-816
ISSN No.:0272-4324
Key Words:Spark discharge; Emission enhanced mechanism; Limits of detections; Excitation/ionization
Abstract:In this work, laser triggered spark discharge was combined with laser-ablation under Air and Ar gases to investigate the characteristics of laser-ablated plasma emission. The experimental results show that the optical emission intensity is significantly enhanced by electric discharge compared to without discharge and the spectral emission time of plasma is much longer than that without discharge. The enhancement effect is more apparent in the presence of Ar ambient. In addition, the plasma temperature and electron density as well as limits of detections (LOD) have been determined. The better LOD can be attributed to the improvement of plasma. The higher plasma temperature and electron density indicate that the enhanced mechanism in emission intensity is predominated by the further excitation/ionization of the laser-ablated material by the spark discharge due to the energy deposition in the plasma.
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。
