| 激光触发SF6-N2混合气体开关的数值模拟 |
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| 引用本文： | 王刚华,王文斗,李洪涛,林其文.激光触发SF6-N2混合气体开关的数值模拟[J].强激光与粒子束,2006,18(11):1922-1926. |
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| 作者姓名： | 王刚华 王文斗 李洪涛 林其文 |
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| 作者单位： | 1. 冲击波与爆轰波国防科技重点实验室, 四川 绵阳 621900;2. 中国工程物理研究院 流体物理研究所， 四川 绵阳 621900 |
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| 基金项目： | 中国工程物理研究院基金资助课题(20030213) |
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| 摘 要： | 在气体放电物理的基础上，对SF6和N2采用双光子电离模型，对碳氢化合物的光电离采用3能级模型，并考虑了混合气体的热电离和激光对气体的欧姆加热作用，建立了激光触发SF6-N2混合气体开关的数值模型，模拟了激光触发SF6-N2混合气体多级间隙开关实验。激光触发延迟时间的计算值与实验结果符合较好。理论计算表明：激光触发SF6-N2混合气体间隙开关的延迟时间随SF6含量的增加呈上升趋势，而随激光脉冲能量、充气压力等的上升呈下降趋势。
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| 关 键 词： | 激光触发 SF6-N2混合气体 气体开关 延迟时间 闭合时间 |
| 文章编号： | 1001-4322(2006)11-1922-05 |
| 收稿时间： | 2006-04-12 |
| 修稿时间： | 2006-09-04 |
Laser triggered SF6-N2 mixture switch modeling |
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| WANG Gang-hua,WANG Wen-dou,LI Hong-tao,LIN Qi-wen.Laser triggered SF6-N2 mixture switch modeling[J].High Power Laser and Particle Beams,2006,18(11):1922-1926. |
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| Authors: | WANG Gang-hua WANG Wen-dou LI Hong-tao LIN Qi-wen |
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| Institution: | 1. Laboratory for Shock Wave and Detonation Physics Research, Mianyang 621900, China;2. Institute of Fluid Physics, CAEP, P.O.Box 919-108, Mianyang 621900, China |
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| Abstract: | A numerical model of laser triggered SF_6-N_2 mixture switch is established on gas discharge physics.The photoionizations of SF_6 and N_2 are described by the double photon ionization model.The photoionization of hydrocarbon can be modeled as a three energy level system simplified from the model of Bischel W K.The mixture is heated by eletric field,and the heating ionizations of mixtures are considered.The calculated switch time delay is compared with that of experiment in the paper.The calculated values of laser triggered delay are in agreement with the experimental results.The delay of laser triggered SF_6-N_2 mixture switch increases as the percentage of SF_6 in the mixture increases,and decreases as the energy of laser pulse,or the pressure increases. |
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| Keywords: | Laser trigger SF_6-N_2 mixture Gas switch Delay time Closed time |
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