Time-dependent global-model simulation for a pseudospark discharge with a cylindrical hollow cathode
Time-dependent global-model simulation for a pseudospark discharge with a cylindrical hollow cathode
复制标题
圆柱形空心阴极赝火花放电的瞬态全局模型仿真
DOI：
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发表时间：
1996
期刊：
影响因子：
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通讯作者：
Jae Koo Lee
中科院分区：
文献类型：
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作者：
H. Lee;Jae Koo Lee
使用全局模型分析了空心阴极赝火花放电的一些特性。计算电子和离子随时间变化的体积平均密度以及电子温度，同时考虑二次电子发射和复合效应。还估计了来自空心阴极的电子电流，并将其与实验中测量的电子束电流进行比较。使用适当的功率因数（定义为传递到系统的能量与外部电容器中存储的总能量的比率），模拟束电流与实验结果一致。计算得出的束流密度约为1 kA/cm2，在氩气压力10-40 mTorr、击穿电压5-24 kV的击穿条件下，圆柱形空心阴极中的最大平均电子密度估计在1014 cm-3范围内。
Some properties of pseudospark discharge in a hollow cathode are analyzed using a global model. The time-dependent volume-averaged densities of electrons and ions, and electron temperature are calculated, taking into account secondary electron emission and recombination effects. The electron current from a hollow cathode is also estimated and compared with the beam current measured in experiments. With an appropriate power factor, defined as the ratio of the energy delivered to the system to the total energy stored in the external capacitor, the simulated beam currents agree with the experimental results. The calculated beam current density is about 1 kA/cm2 and the maximum average electron density in the cylindrical hollow cathode is estimated to be in the range of 1014 cm-3 under the breakdown conditions of 10–40 mTorr pressure of argon gas and 5–24 kV breakdown voltage.