光子学报 ›› 2020, Vol. 49 ›› Issue (2): 230002-0230002.doi: 10.3788/gzxb20204902.0230002

• 光谱学 • 上一篇    

平板约束下激光诱导等离子体的动态仿真

李佶龙1,2, 王傲松1, 刘彦章1, 黄大鹏1, 邱岩2, 吴坚2   

  1. 1. 中广核工程有限公司 核电安全监控技术与装备国家重点实验室, 广东 深圳 518172;
    2. 西安交通大学 电气工程学院, 西安 710049
  • 收稿日期:2019-09-10 出版日期:2020-02-25 发布日期:2020-02-29
  • 通讯作者: 吴坚(1985-),男,教授,博士,主要研究方向为放电等离子体技术及应用.Email:jxjawj@mail.xjtu.edu.cn
  • 作者简介:李佶龙(1995-),男,硕士研究生,主要研究方向为激光诱导等离子体.Email:505131527@qq.com
  • 基金资助:
    国家自然科学基金(No.51790523)

Dynamic Simulation of Laser-produced Plasma under Plate Constraint

LI Ji-long1,2, WANG Ao-song1, LIU Yan-zhang1, HUANG Da-peng1, QIU Yan2, WU Jian2   

  1. 1. State Key Laboratory of Nuclear Power Saftey Monitoring Technology and Equipment, China Guangdong Nuclear Power Engineering Company, Shenzhen Guangdong, 518172, China;
    2. School of Electrical Engineering, Xi'an Jiaotong University, Xi'an 710049, China
  • Received:2019-09-10 Online:2020-02-25 Published:2020-02-29
  • Supported by:
    The National Natural Science Foundation of China(No. 51790523)

摘要: 为深入认识空间约束增强的物理机理,采用二维可压缩流体模型,建立平板约束下激光诱导等离子体动力学行为的数值模拟模型,计算了平板约束下等离子体的演化过程,得到的一系列时间分辨的温度分布结果与实验结果基本一致.揭示了平板约束下,反射激波对等离子体的压缩作用导致等离子体温度升高的机理.对不同激光能量和不同约束板间距对等离子体温度增强效果和增强时刻的影响进行了研究,两板间距增加,增强时刻明显延迟,等离子体温度的增强效果削弱.

关键词: 等离子体光谱学, 激光诱导击穿光谱, 等离子体仿真, 空间约束, 等离子体增强

Abstract: For further understanding the physical mechanism of space constraints, we used the two-dimensional compressible fluid model, established dynamic simulation of laser-produced plasma under plate constraint, and calculated the evolution of the plasma process under the plate constraint. A series of time-resolved temperature distribution results obtained are basically identical with the experimental results. The mechanism of plasma temperature increase caused by the compression effect of reflected shock wave under the constraint of flat plate is revealed. The effects of different laser energies and different spacing of restraint plates on the peak temperature and the peak time of plasma temperature were also studied. The distance between the two plates increases, the peak time is obviously delayed and the enhancement effect on plasma temperature is weakened.

Key words: Plasma spectroscopy, Lase-induced breakdown spectroscopy, Plasma simulation, Spatial constraint, Plasma enhancement

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