Highly efficient electron beam generation in a wide-aperture discharge in helium

被引：11
|
作者：
Belskaya, E. V. [1 ]
Bokhan, P. A. [1 ]
Zakrevsky, Dm. E. [1 ]
机构：
[1] Russian Acad Sci, Inst Semicond Phys, Siberian Branch, Novosibirsk 630090, Russia
来源：
APPLIED PHYSICS LETTERS | 2008年 / 93卷 / 09期
关键词：
D O I：
10.1063/1.2978350
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The paper deals with a gas discharge having electron beam generation efficiency eta similar or equal to 100% at a voltage U>300 V. The discharge has been realized in helium in a cell with a cathode diameter of 19.5 cm. The discharge features are a higher eta as compared to other discharges, the presence of reverse bends in the voltage-current characteristics including the occurrence of a falling section, and nonmonotony in eta(U) and its growth with increasing He pressure. The discharge peculiarities are explained by its photoemissive nature. The basic contribution to the photoemission is made by the emission from the resonance state excited in the secondary processes. (c) 2008 American Institute of Physics.
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页数：3
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