How short is the runaway electron flow in an air electrode gap?

被引：40

作者：

Mesyats, G. A. ^{[1
,2
]}

Yalandin, M., I ^{[1
,2
]}

Zubarev, N. M. ^{[1
,2
]}

Sadykova, A. G. ^{[2
]}

Sharypov, K. A. ^{[2
]}

Shpak, V. G. ^{[2
]}

Shunailov, S. A. ^{[2
]}

Ulmaskulov, M. R. ^{[2
]}

Zubareva, O., V ^{[2
]}

Kozyrev, A., V ^{[3
]}

Semeniuk, N. S. ^{[2
,3
]}

机构：

[1] Russian Acad Sci, Lebedev Phys Inst, Moscow 119991, Russia

[2] UB RAS, Inst Electrophys, Ekaterinburg 620016, Russia

[3] SB RAS, Inst High Current Elect, Tomsk 634055, Russia

来源：

APPLIED PHYSICS LETTERS | 2020年 / 116卷 / 06期

关键词：

MECHANISM; ACCELERATION; DIODE;

D O I：

10.1063/1.5143486

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

We present and analyze characteristics of the runaway electron flow in a high-voltage (the voltage rise rate of up to 1.5 MV/ns) air-filled electrode gap with a strongly nonuniform electric field. It is demonstrated that such a flow contains a high-energy electron component of duration not more than 10 ps. According to numerical simulations, runaway electron generation/termination is governed by impact ionization of the gas near the cathode and switching on/off a critical (sufficient for electrons to run away) electric field at the boundary of the expanding cathode plasma. The corresponding characteristic time estimated to be 2-3 ps is defined by the ionization rate at a critical field. Published under license by AIP Publishing.

引用

页数：5

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