气体开关击穿机理的初步研究
彭建昌;王颖;王利民;李爽;王雪峰;林强;谢晋
【期刊名称】《现代应用物理》 【年(卷),期】2014(000)002
【摘要】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 .%分析了气体开关阴极表面初始电子的产生机制及其影响因素，给出开关电场是决定发射电流密度的关键因素。根据汤逊碰撞理论，讨论了开关电场、气压和
气体开关击穿机理的初步研究
