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激光暗荧光光谱电场测量微扰计算与实验

王桢 吕日毅 李超 陈俊锋 张曼

王桢, 吕日毅, 李超, 陈俊锋, 张曼. 激光暗荧光光谱电场测量微扰计算与实验[J]. 中国光学(中英文). doi: 10.37188/CO.2024-0037
引用本文: 王桢, 吕日毅, 李超, 陈俊锋, 张曼. 激光暗荧光光谱电场测量微扰计算与实验[J]. 中国光学(中英文). doi: 10.37188/CO.2024-0037
WANG Zhen, LV Ri-yi, LI Chao, CHEN Jun-feng, ZHANG Man. Calculation and experiment of tiny perturbations in electric field measurement for the Laser-induced fluorescence-dip spectroscopy method[J]. Chinese Optics. doi: 10.37188/CO.2024-0037
Citation: WANG Zhen, LV Ri-yi, LI Chao, CHEN Jun-feng, ZHANG Man. Calculation and experiment of tiny perturbations in electric field measurement for the Laser-induced fluorescence-dip spectroscopy method[J]. Chinese Optics. doi: 10.37188/CO.2024-0037

激光暗荧光光谱电场测量微扰计算与实验

doi: 10.37188/CO.2024-0037
基金项目: 国家重点研发计划(No. 2022YFC2808101)
详细信息
    作者简介:

    王 桢(1990—),男,江苏南通人,工程师,2013年于国防科学技术大学获得学士学位,2015年于国防科学技术大学获得工学硕士学位,2021年于德国卡尔斯鲁厄理工学院获得工学博士学位,主要从事脉冲功率、光学诊断、量子探测等方面的研究。E-mail:18774840943@163.com

  • 中图分类号: O536

Calculation and experiment of tiny perturbations in electric field measurement for the Laser-induced fluorescence-dip spectroscopy method

Funds: Supported by National Key Research and Development Program of China (No. 2022YFC2808101)
More Information
  • 摘要:

    目的:为了实现强流脉冲电子束对材料表面改性的工业化应用,需要对电子束的作用过程进行实时微扰监测。电场强度是反映电子束特性的关键参数之一,基于Stark效应的激光暗荧光光谱可实现对环境电场的微扰测量。因此,开展激光功率密度对环境电场的影响研究,对此类电场测量方法的参数设置和结果判断具有重要的理论和应用价值。方法:通过理论分析和计算得出电场测量微扰状态下的激光功率密度与试验环境的关系模型;基于上述关系模型,搭建测试平台,实验验证激光功率密度对电场测量微扰的情况。结果:实验结果表明:在示踪气体氙气压强为$ 1.0\times {10}^{-4} $ mbar、电场强度在2 kV/cm及以下的条件下,对电场测量微扰的激光功率密度值为5 MW/cm2,与理论计算值基本一致。结论:研究结果填补了激光暗荧光光谱诊断方法中激光功率密度对电场影响定量分析方法的空白,可应用在同类电场测量方法中,为激光功率密度与实验参数的设置提供依据和参照,支撑电场测量实验的开展,有效提升电场测量的准确性。

     

  • 图 1  新型激光暗荧光光学诊断基本原理图

    Figure 1.  The basic principle of modified Laser-induced fluorescence-dip spectroscopy method

    图 2  三阶电离能级分布示意图

    Figure 2.  Three-level scheme for xenon with two-photon excitation and ionization effect

    图 3  电离比例与激光功率密度对应关系示意图

    Figure 3.  Diagram of the relationship between ionization ratio and laser power density

    图 4  平板电极间的电势分布

    Figure 4.  Potential distributions between plane electrodes

    图 5  新型暗荧光光学诊断实验平台示意图

    Figure 5.  Experimental set-up for the modified-LIF-DIP Diagnostics

    图 6  激光暗荧光光学诊断测试腔示意图

    Figure 6.  The sketch of measurement chamber

    图 7  激光功率密度为10 MW/cm2时,暗荧光信号分布图

    Figure 7.  Fluorescence dip signal distribution when the laser power density is 10 MW/cm2

    图 8  激光功率密度为5 MW/cm2时,暗荧光信号分布图

    Figure 8.  Fluorescence dip signal distribution when the laser power density is 5 MW/cm2

    图 9  激光功率密度为5 MW/cm2时,暗荧光信号2 kV/cm与0 kV/cm的谐振波长对比

    Figure 9.  Resonant wavelength of fluorescence dip signal in 2 kV/cm and 0 kV/cm when the laser power density is 5 MW/cm2

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出版历程
  • 收稿日期:  2024-02-27
  • 录用日期:  2024-04-26
  • 网络出版日期:  2024-05-22

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