The Effect of Electrode Temperature on Vacuum Electrical Breakdown between Plane‐Parallel Copper Electrodes
The Effect of Electrode Temperature on Vacuum Electrical Breakdown between Plane‐Parallel Copper Electrodes
复制标题
电极温度对平面平行铜电极间真空电击穿的影响
DOI：
10.1063/1.1656718
复制
发表时间：
1968
影响因子：
3.2
通讯作者：
M. A. Biondi
中科院分区：
文献类型：
--
作者：
D. K. Davies;M. A. Biondi
对平面平行铜电极在真空中的电流-电压、预击穿特性和击穿电压进行了综合测量，作为阴极初始温度和阳极初始温度的函数。这些测量是在313° ~ 913°K的温度范围内对0.1 cm的电极间距进行的。从实验数据的阴极表面的最热点的温度，（TC）s，和阳极表面，（TA）s，在击穿时已被确定为电极初始温度的函数。在整个研究范围内，发现（TA）s大于（TC）s。击穿时（TA）s的计算值与阳极初始温度基本无关，平均值为（1100±150）°K。相反，击穿时的（TC）s值随着阴极初始温度值的增加而增加。结果表明，阳极表面某一点的热不稳定性是导致阳极氧化的主要原因。
Combined measurements of current‐voltage, prebreakdown characteristics, and breakdown voltage have been made for plane‐parallel, copper electrodes in ultrahigh vacuum as a function of both cathode initial temperature and anode initial temperature. These measurements have been carried out for an electrode separation of 0.1 cm over the temperature range from 313° to 913°K. From the experimental data the temperatures of the hottest point of the cathode surface, (TC)s, and of the anode surface, (TA)s, at breakdown have been determined as a function of electrode initial temperature. Over the whole range of the investigation it is found that (TA)s is greater than (TC)s. Moreover, the calculated values of (TA)s at breakdown are essentially independent of anode initial temperature and have a mean value of (1100±150)°K. In contrast, the values of (TC)s at breakdown increase with increasing values of cathode initial temperature. The results suggest that a thermal instability of a point on the anode surface leads to...