Ecton processes in the generation of pulsed runaway electron beams in a gas discharge
- 作者: Mesyats G.1
-
隶属关系:
- Lebedev Physical Institute
- 期: 卷 43, 编号 9 (2017)
- 页面: 952-956
- 栏目: Low-Temperature Plasma
- URL: https://journals.rcsi.science/1063-780X/article/view/186236
- DOI: https://doi.org/10.1134/S1063780X17090070
- ID: 186236
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详细
As was shown earlier for pulsed discharges that occur in electric fields rising with extremely high rates (1018 V/(cm s)) during the pulse rise time, the electron current in a vacuum discharge is lower than the current of runaway electrons in an atmospheric air discharge in a 1-cm-long gap. In this paper, this is explained by that the field emission current from cathode microprotrusions in a gas discharge is enhanced due to gas ionization. This hastens the initiation of explosive electron emission, which occurs within 10–11 s at a current density of up to 1010 A/cm2. Thereafter, a first-type cathode spot starts forming. The temperature of the cathode spot decreases due to heat conduction, and the explosive emission current ceases. Thus, the runaway electron current pulse is similar in nature to the ecton phenomenon in a vacuum discharge.
作者简介
G. Mesyats
Lebedev Physical Institute
编辑信件的主要联系方式.
Email: mesyats@sci.lebedev.ru
俄罗斯联邦, Moscow, 119991