Mechanism of anomalous ion generation in vacuum arcs
Mechanism of anomalous ion generation in vacuum arcs
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DOI：
10.1070/pu2002v045n10abeh001247
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发表时间：
2002
期刊：
影响因子：
2.7
通讯作者：
Gennadii A Mesyats;Sergei A Barengol'ts
中科院分区：
文献类型：
--
作者：
Gennadii A Mesyats;Sergei A Barengol'ts
本文在分析电子过程的基础上，提出了真空电弧中离子流产生的模型。它示出的电荷状态和定向运动的离子的速度的结果从阴极微截面被爆炸性地破坏焦耳加热与高密度电流。在这种情况下，电离过程发生在阴极附近的狭窄（微米量级）区域内，此后等离子体的离子组成保持不变。对于高达千安培的电弧电流，电流增加只是增加了同时操作的电子的数量，从而解释了真空电弧电流上的离子流参数的弱实验依赖性。
A model for the generation of an ion flow in a vacuum arcs is proposed, based upon the analysis of electron processes. It is shown that the charge states and the velocities of directed motion of the ions result from cathode microsections being explosively destroyed by Joule heating with a high-density current. In this case, the ionization processes occur within a narrow (of the order of a micrometer) region near the cathode, and thereafter the ionic composition of the plasma remains unchanged. For arc currents of up to a kiloampere, a current increase simply increases the number of simultaneously operating ectons, thus explaining the weak experimental dependence of ion flow parameters on the vacuum arc current.