Mode transition in miniature dc discharge driven by an auxiliary electrode
Mode transition in miniature dc discharge driven by an auxiliary electrode
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辅助电极驱动的微型直流放电的模式转换
DOI：
10.1088/0963-0252/24/3/034008
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发表时间：
2015
影响因子：
3.8
通讯作者：
I. Schweigert
中科院分区：
文献类型：
--
作者：
I. Schweigert
不同制度的操作一个微型1厘米大小的直流放电动力学粒子在细胞模拟研究。研究了P=1？>托由从加热的阴极发射的电子流维持。中心有孔的隔膜被放置在离阳极一定距离处以限制电流通道。当膜片处于浮置电位时，膜片孔附近出现双层结构。这种双层结构通过改变电子能量分布函数的形状在等离子体形成中起着关键作用。与之前的实验[]一样，在我们的模拟中，通过增加施加到隔膜的电压来驱动放电辉光的不同状态之间的过渡。
Different regimes of operation of a miniature 1 cm-size dc discharge are studied in kinetic particle-in-cell simulations. The glow of low voltage dc discharge in helium at P=1 ?> Torr is sustained by the electron current emitted from a heated cathode. A diaphragm with a hole in the center is placed at a certain distance from the anode to restrict the current channel. A double layer structure appears near the diaphragm hole when the diaphragm is on the floating potential. This double layer structure plays the key role in plasma formation by changing the shape of electron energy distribution function. As in previous experiment [], in our simulation the transition between different regimes of discharge glow is driven by increasing the voltage applied to the diaphragm.