Large area ring-shaped LaB6 cathode

lin zu-lun; cao gui-chuan; zhang yi-de; chen ze-xiang; qi kang-cheng

Volume 18 Issue 02

Feb. 2006

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Article Navigation > High Power Laser and Particle Beams > 2006 > 18(02): 0-

liu xuan, zhou wei-min, zhao li-jie, et al. Molecular dynamics simulation of ultrashort laser induced back-surface spallation in metallic film[J]. High Power Laser and Particle Beams, 2006, 18.

Citation:

lin zu-lun, cao gui-chuan, zhang yi-de, et al. Large area ring-shaped LaB6 cathode[J]. High Power Laser and Particle Beams, 2006, 18.

liu xuan, zhou wei-min, zhao li-jie, et al. Molecular dynamics simulation of ultrashort laser induced back-surface spallation in metallic film[J]. High Power Laser and Particle Beams, 2006, 18.

Citation:

lin zu-lun, cao gui-chuan, zhang yi-de, et al. Large area ring-shaped LaB6 cathode[J]. High Power Laser and Particle Beams, 2006, 18.

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Large area ring-shaped LaB6 cathode

1.
School of Opto-electronic Information,University of Electronic Science and Technology of China,Chengdu 610054,China

Publish Date: 2006-02-15

Abstract

Abstract

In this paper we reported a ring-shaped LaB6 cathode with a large emission area of 115 mm2. The direct emission current density of the LaB6 was more than 40 A/cm2 when the temperature of LaB6 was 1 873 K. The heating power for the LaB6 cathode was only 173 W when the temperature of LaB6 cathode was as high as 1 873 K, in which an electron beam source was employed as the heater. The heating power decreased 66%, compared to that when the conversional graphite acted as the heater. It presented excellent emitting performance even after the cathode was exposed to the air many times.
- lab6 cathode,
- electron bombing,
- intense emitting current source,
- work function,
- dissipation power of anode

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