短间隙磁控放电离子电流特性及影响因素研究  

Characteristics of magnetron discharge in short vacuum gap

作　　者：胡上茂 姚学玲[2] 陈景亮[2] 

机构地区：[1]南方电网科学研究院高电压技术研究所,广东广州510080 [2]西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049

出　　处：《电工电能新技术》2015年第8期44-50,共7页Advanced Technology of Electrical Engineering and Energy

基　　金：国家自然科学基金资助项目(5117713)

摘　　要：传统Penning磁控放电理论测量真空间隙要求真空间距大于10mm,无法测量现有短间距1-7mm触发真空开关内部真空度。因此,本文实验研究了在短间隙1-7mm条件下,磁控管放电离子电流特性及其影响因素。实验结果表明,Penning磁控放电下随着气压由10-4Pa向10-1Pa增加时,离子电流波形由三角波逐渐向方波转变,并非呈一方波不变。在电场和磁场满足Penning磁控放电着火条件下,离子电流峰值只受电场影响,与磁场无关;离子电流脉冲宽度只受磁场的影响,与电场无关。离子电流峰值与电荷随气压的变化呈幂函数变化。The existing vacuum meter based on Penning magnetron discharging needs vacuum gap greater than10 mm. An experiment is carried on the ionic current characteristics of magnetron discharge in a short gap of 1-7mm. Experimental results show that,the ionic current waveform is a trapezoidal wave at 10^- 4Pa rather than a square wave and the ionic current wave shifts from a trapezoidal to a square wave with the pressure increasing. The ionic peak current is only affected by electric field and the ionic current pulse width is only affected by magnetic fields,so that the ionic current charge is affected both by the electric and magnetic fields. The ionic peak current decreases with the vacuum gap increasing between 1mm and 7mm,and the decreasing rate is of 5%,but it changes relatively small in the ionic current charge. Lastly,it presents an exponential function between the changes of vacuum pressure and ionic peak current and charge.

关 键 词：真空 气压 离子电流 磁控放电 触发真空开关 

分 类 号：TN107[电子电信—物理电子学]