脉冲HF化学激光体系中的放电模式分析  

Discharge mode analysis of pulsed chemical HF laser system

作　　者：杨楠楠 张家良[1] 赵永利 李国富 温小琼[1] YANG Nan-nan;ZHANG Jia-liang;ZHAO Yong-li;LI Guo-fu;WEN Xiao-qiong(State key Laboratory for Material Modification,Dalian University of Technology,Dalian 116024;State key Laboratory of Chemical Lasers,Dalian Institute of Chemical Physics,Chinese Academy of Sciences,Dalian 116023)

机构地区：[1]大连理工大学三束材料改性教育部重点实验室,大连116024 [2]中国科学院大连化学物理研究所,大连116023

出　　处：《核聚变与等离子体物理》2021年第3期284-288,共5页Nuclear Fusion and Plasma Physics

基　　金：国家自然科学基金(11375041)。

摘　　要：采用面阵滑闪火花预电离诱导的平行板放电结构,研究了SF_(6)-C_(2)H_(6)混合气体中的脉冲放电模式,确认了不同放电条件下存在自持体放电(SSVD)和电弧放电两种模式,且两种模式可以互相转化。SSVD模式放电电流波形主要由电容电压和气压决定,气体混合比和储能电容值对其影响很小。SSVD电流峰值随电容电压增加基本线性增加,随气压增加线性减小,分析表明这一特性是因为SSVD是由多个同步电子雪崩在时空上叠加而成,属于α过程主导的电子雪崩放电。The pulsed discharge mode of SF_(6)-C_(2)H_(6) mixtures was investigated using plane electrode configuration assisted with pre-ionization spark array on the cathode.The results show that self-sustained volume discharge(SSVD)and arc discharge could occur and transform for different discharge conditions.The SSVD current waveform is influenced significantly by charging voltage and pressure instead of the gas mixture ratio and capacitance.The peak of SSVD current relates positively to charging voltage,while negatively to gas pressure,which indicates that synchronous electron avalanches initiated from cathode by the sliding spark and overlapped spatially into SSVD and thus SSVD is essentially Townsend discharge withαavalanche.

关 键 词：非链式HF激光器 SF6-C2H6混合气体 自持体放电 电子雪崩 

分 类 号：O539[理学—等离子体物理]