Plasma characterization in a diode with a carbon-fiber cathode

被引：43

作者：

Vekselman, V. ^{[1
]}

Gleizer, J. ^{[1
]}

Yarmolich, D. ^{[1
]}

Felsteiner, J. ^{[1
]}

Krasik, Ya. ^{[1
]}

Liu, L. ^{[2
]}

Bernshtam, V. ^{[3
]}

机构：

[1] Technion Israel Inst Technol, Dept Phys, IL-32000 Haifa, Israel

[2] Natl Univ Def Technol, Coll Photoelect Sci & Engn, Changsha 410073, Hunan, Peoples R China

[3] Weizmann Inst Sci, Dept Phys, IL-61000 Rehovot, Israel

来源：

APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 08期

关键词：

D O I：

10.1063/1.2976136

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Results of optical and spectroscopic studies of the plasma formation at the surface of two types of carbon-fiber cathodes in a diode powered by an similar to 200 kV accelerating pulse are presented. It was found that during the pulse, generation of the plasma occurs in a form of several millimeter size plasma spots. In the vicinity of the cathode surface the average plasma density and temperature were found to be similar to 3 x 10(14) cm(-3) and similar to 5 eV, respectively, for an electron current density of similar to 22 A/cm(2). The plasma expansion velocity toward the anode was found to be similar to 1.5 x 10(6) cm/s during the first 150 ns of the accelerating pulse duration. (C) 2008 American Institute of Physics.

引用

页数：3

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