Thermionic cathode with a mixed LaB6 and TaC emission layer

被引：0
作者：
Cao, Guichuan [1 ]
Qi, Kangcheng [1 ]
Yin, Yi [1 ]
Lin, Zulun [1 ]
机构：
[1] School of Opto-electronic Information, University of Electronic Science and Technology of China
来源：
Qiangjiguang Yu Lizishu/High Power Laser and Particle Beams | 2013年 / 25卷 / 10期
关键词：
Electron emission; LaB[!sub]6[!/sub; Thermionic cathode; Work function;
D O I：
10.3788/HPLPB20132510.2739
中图分类号：
学科分类号：
摘要：
A thermionic cathode with a mixed LaB6 and TaC emission layer was investigated. Emission properties of cathodes with LaB6 to TaC weight ratios of 1:1, 2:1, and 3:1 were studied and compared. The work function of the mixed LaB6 cathode was found to be similar to that of polycrystalline LaB6 cathodes. Stable electron emission with a current density of about 30 A/cm2 was achieved with cathode recipe of 3:1. The cathode can be applied to vacuum electronic devices and dynamic vacuum electron-beam equipments where large electron current density and extremely large area cathodes are demanded.
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收藏
页码：2739 / 2741
页数：2
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