Thermal analysis of heating structure for thermionic cathode electron gun

cheng cheng; cheng daoxi; zheng shuxin; duo jinsheng

Volume 22 Issue 07

Jun. 2010

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Article Navigation > High Power Laser and Particle Beams > 2010 > 22(07): 0-

Hui Hongchao, Guo Yajing, Xiong Zhimin, et al. Evaluation of reliability for image processing of high power laser’s automatic alignment[J]. High Power Laser and Particle Beams, 2013, 25: 867-871.

Citation:

cheng cheng, cheng daoxi, zheng shuxin, et al. Thermal analysis of heating structure for thermionic cathode electron gun[J]. High Power Laser and Particle Beams, 2010, 22.

Hui Hongchao, Guo Yajing, Xiong Zhimin, et al. Evaluation of reliability for image processing of high power laser’s automatic alignment[J]. High Power Laser and Particle Beams, 2013, 25: 867-871.

Citation:

cheng cheng, cheng daoxi, zheng shuxin, et al. Thermal analysis of heating structure for thermionic cathode electron gun[J]. High Power Laser and Particle Beams, 2010, 22.

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Thermal analysis of heating structure for thermionic cathode electron gun

1.
Key Laboratory of Particle and Radiation Imaging of Ministry of Education,Department of Engineering Physics,Tsinghua University,Beijing 100084,China;
2.
Key Laboratory of High Energy Radiation Imaging Fundamental Science for National Defense,Tsinghua University,Beijing 100084,China

Publish Date: 2010-06-30

Abstract

Abstract

Some thermal analysis results of several heating structures for thermionic cathode electron gun by using ANSYS code and COMSOL code were presented in this paper, and some instructions for heating structure design were obtained. A series of heating structures of thermionic cathode were tested in experiments, verifying the results of the thermal analysis, and so an efficiency heating structure was attained. In this structure, at a heating power about 100 W, the temperature of cathode was more than 1 900 K which meets at the working temperature required by Ir-Ce cathode. Under a temperature of 1 800 K and the electric field on the cathode surface of 3.6×106 V/m, the Ir-Ce cathode gives a maximum emission current of 1.04 A and the emission current density of 13 A/cm2.
- electron gun,
- heating structure,
- thermal analysis,
- cathode temperature

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