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

Influence of a Static Magnetic Field on Laser Induced Tungsten Plasma in Air

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Indexed by:期刊论文

Date of Publication:2016-04-01

Journal:PLASMA SCIENCE & TECHNOLOGY

Included Journals:SCIE、EI、Scopus

Volume:18

Issue:4

Page Number:364-369

ISSN No.:1009-0630

Key Words:laser-induced breakdown spectroscopy; magnetic field; tungsten plasma; spatial evolution

Abstract:In this work, laser induced tungsten plasma has been investigated in the absence and presence of 0.6 T static transverse magnetic field at atmospheric pressure in air. The spectroscopic characterization of laser induced tungsten plasma was experimentally studied using space-resolved emission spectroscopy. The atomic emission lines of tungsten showed a significant enhancement in the presence of a magnetic field, while the ionic emission lines of tungsten presented little change. Temporal variation of the optical emission lines of tungsten indicated that the atomic emission time in the presence of a magnetic field was longer than that in the absence of a magnetic field, while no significant changes occurred for the ionic emission time. The spatial resolution of optical emission lines of tungsten demonstrated that the spatial distribution of atoms and ions were separated. The influence of a magnetic field on the spatial distribution of atoms was remarkable, whereas the spatial distribution of ions was little influenced by the magnetic field. The different behaviors between ions and atoms with and without magnetic field in air were related to the various atomic processes especially the electrons and ions recombination process during the plasma expansion and cooling process.

Pre One:Preparation and characterization of a tungsten coating layer on CuCrZr alloy for the plasma facing components of the east

Next One:Characterization of Carbon Plasma Evolution Using Laser Ablation TOF Mass Spectrometry

Profile

海然,副教授,博士生导师,国家重点研发项目负责人,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年9月至2016年10月公派赴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。

主要从事基于激光光谱技术托卡马克装置内壁状态原位诊断、等离子体与壁材料相互作用研究,同时,包括环境污染、工业样品中多元素成分的远程、实时、定量化激光光谱分析、有机物快速分类等研究工作。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30余篇,SCI-Q1分区封面论文3篇,已授权发明专利10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。