Thermal Deformation Analysis and Electron Beam Optics Simulation for a Thermionic Electron Gun Design

被引：2

作者：

Jang, Seungsoo ^{[1
]}

Hwang, Jihyun ^{[1
]}

Park, Sung-Ju ^{[2
]}

Namkung, Won ^{[2
]}

Cho, Moohyun ^{[3
]}

Seo, Hyeong-Seok ^{[4
]}

机构：

[1] Pohang Univ Sci & Technol, Dept Phys, Pohang 37673, South Korea

[2] Pohang Accelerator Lab, Pohang 37874, South Korea

[3] Pohang Univ Sci & Technol, Dept Adv Nucl Engn, Pohang 37673, South Korea

[4] Vitzrotech Co, Ansan 15603, South Korea

来源：

JOURNAL OF THE KOREAN PHYSICAL SOCIETY | 2018年 / 73卷 / 08期

基金：

新加坡国家研究基金会;

关键词：

Klystron; Electron gun; Thermal deformation; ANSYS code; EGUN code; CST code;

D O I：

10.3938/jkps.73.1042

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

When the thermionic electron gun of the klystron operates, the structure around the cathode is subjected to thermal deformation due to the high operating temperature of the cathode. A thermal deformation analysis of the existing electron gun with cold' dimensions (dimension on fabrication) was done using the ANSYS code to get the hot' dimensions of the electron gun on operation. After that, the optics of the emitted electron beam were simulated using two codes (EGUN and CST-PS) for the two cases of the cold' dimension and the hot' dimension. We compared the beam trajectories of the above two cases to investigate the change in the physical quantities, which would have a strong effect on the klystron performance due to the thermal deformation. The thermal deformation was found to cause a perveance change as large as 15%. The scalloping behavior was also investigated with an applied magnetic field for the two cases of cold and hot dimensions.

引用

页码：1042 / 1048

页数：7

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