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.
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页数：3
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