Electrical breakdown in low pressure gases
Electrical breakdown in low pressure gases
复制标题
DOI：
10.1088/0022-3727/35/10/201
复制
发表时间：
2002-05
期刊：
影响因子：
--
通讯作者：
M. Pejovic;G. Ristić;J. Karamarković
中科院分区：
文献类型：
--
作者：
M. Pejovic;G. Ristić;J. Karamarković
本文介绍了当阴极释放的二次电子在电击穿引发中起主导作用时，低压气体中电击穿的研究结果。二次电子是由先前击穿和放电期间形成的带电和中性物质以及 γ 射线产生的。电击穿研究基于对具有直径远大于电极间距离的球形电极的充气管的电击穿电压和电击穿时间延迟的测量。讨论了击穿电压和时间延迟的随机性质，并显示了基于实验数据的它们的分布。还分析了静态击穿电压的测定方法。研究了不同参数（过电压、阴极材料及其表面纯度、气体压力、辉光电流等）对延时的影响。特别关注各种气体中的记忆效应，该效应取决于正离子重组时间、氮和氢情况下的催化重组时间以及稀有气体中的亚稳态去激发时间。这种效应的分析是通过记忆曲线来完成的，根据记忆曲线，当宇宙和环境辐射在电击穿引发中起主导作用时，可以跟踪长寿命中性活性状态的存在至其非常低的浓度。
The paper presents the results of investigation of the electrical breakdown in low pressure gases when the secondary electrons released from the cathode play the dominant role in the initiation of electrical breakdown. The secondary electrons are created by the charged and neutral species formed during the previous breakdown and discharge as well as by γ-rays. Electrical breakdown investigations are based on the measurements of electrical breakdown voltage and electrical breakdown time delay for gas-filled tubes with spherical electrodes with diameters much larger than an interelectrode distance. Stochastic nature of both the breakdown voltage and time delay are discussed and their distributions based on experimental data are shown. The methods for the determination of static breakdown voltage are also analysed. The influence of different parameters (overvoltage, cathode material and its surface purity, gas pressure, glow current, etc) on time delay are studied. A special attention is paid to the memory effect in various gases that depends on the positive ion recombination times, catalytic recombination times in the case of nitrogen and hydrogen, as well as metastable states deexcitation times in noble gases. The analysis of this effect is done by memory curves on the basis of which the presence of long-lived neutral active states can be followed to their very low concentrations when cosmic and environment radiation play the dominant role in electrical breakdown initiation.