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

页码：2393 / 2396

页数：3