Emission characteristics of several field emission cathode materials

被引：1
|
作者：
Bai X. [1 ]
Yang J. [1 ]
Zhang J. [1 ]
Ren H. [1 ]
机构：
[1] College of Opto-Electronic Science and Technology, National University of Defense Technology
来源：
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2010年 / 22卷 / 10期
关键词：
Cathode materials; Emission characteristic; Graphite cathode; Relative emission delay; Tri-cathode accelerator; Velvet cathode;
D O I：
10.3788/HPLPB20102210.2393
中图分类号：
学科分类号：
摘要：
The comparative studies by using a tri-cathode accelerator are presented on the cathode emission capability, relative emission delay and emission-time jitter of several common cathode materials, that is, stainless-steel, brass, aluminum, velvet and graphite. The stainless-steel has better quality than other metal cathode materials. At 300~450 kV diode voltage and 30 mm anode-cathode gap, the stainless-steel cathode emission current density is 0.78~1.50 kA/cm2 accordingly. With a constant diode voltage, the emission-time jitter of the stainless-steel is less than 8 ns, and both the velvet and graphite emission-time jitters are less than 4 ns. The cathode emission starting time of all those materials shortens when cathodes work shot by shot frequently.
引用
收藏
页码：2393 / 2396
页数：3
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