现代应用物理Issue(2)：129-134,6.
气体开关击穿机理的初步研究
Preliminary Research on Breakdown Mechanism of Gas Switch
彭建昌 1王颖 2王利民 1李爽 2王雪峰 1林强 2谢晋1
作者信息
- 1. 西北核技术研究所，西安 710024
- 2. 高功率微波技术重点实验室，西安 710024
- 折叠
摘要
Abstract
By analysing the mechanism and influential factors of initial electrons generated on gas switch cathode surface , we point out that the gas switch�s electric field strength is a key factor affecting the field emission current density . According to the collision ionization theo-ry , the influence of the electric field strength , pressure , and temperature on Townsend�s first ionization coefficient has been analyzed . While the pressure and temperature are retained constant , Townsend�s first ionization coefficient increases with the increase of the electric field strength . Experimental researches on the gas switch�s output pulse front and its main influential factors show that by increasing the pressure and the breakdow n electric field strength , Townsend�s first ionization coefficient increases , the gas ionization process is ac-celerated , and the output pulse edge will be reduced , so that increasing the breakdown elec-tric field strength is an effective way to steep the forefront of the output pulse . Under the condition of high electric field , collision ionization is not the main ionizing form of gas .关键词
气体开关/初始电子/气体电离/电场/脉冲前沿Key words
gas switch/initial electron/gas ionization/electric field/pulse front edge分类
信息技术与安全科学引用本文复制引用
彭建昌,王颖,王利民,李爽,王雪峰,林强,谢晋..气体开关击穿机理的初步研究[J].现代应用物理,2014,(2):129-134,6.
