Helical Electron Beam Status Online Evaluation for Magnetron Injection Gun

Wei Jiang; Chaoxuan Lu; Binyang Han; Boxin Dai; Qiang Zheng; Guo Liu; Jianxun Wang; Yong Luo

doi:10.3390/qubs8010003

Quantum Beam Science (Dec 2023)

Helical Electron Beam Status Online Evaluation for Magnetron Injection Gun

Wei Jiang,
Chaoxuan Lu,
Binyang Han,
Boxin Dai,
Qiang Zheng,
Guo Liu,
Jianxun Wang,
Yong Luo

Affiliations

Wei Jiang: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Chaoxuan Lu: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Binyang Han: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Boxin Dai: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Qiang Zheng: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Guo Liu: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Jianxun Wang: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China
Yong Luo: School of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu 610054, China

DOI: https://doi.org/10.3390/qubs8010003
Journal volume & issue: Vol. 8, no. 1
p. 3

Abstract

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The magnetron injection gun (MIG) is an essential component of the gyrotron traveling wave tube (gyro-TWT). Although the electron beam status influences the performance of the device, it cannot be measured directly in the experiment. An online evaluation module (OEM) for the experiment is developed to calculate the instant beam parameters of MIG. The OEM, by reconstructing the geometry of the MIG and related magnetic field distribution, can obtain the electron beam status under the operating parameters through the online simulation. The beam velocity spread of thermal emission with instant temperature and surface roughness are also considered. The validation is done in a W-band gyro-TWT, and the beam performance is evaluated in the experiment. With a pitch factor of 1.06 electron beam, the velocity spread affected by the electric-magnetic mismatch, thermal emission, and roughness is 1.00%, 0.56%, and 0.43%, respectively. The other beam parameters are also presented in the developed module. The OEM could guide and accelerate the testing process and ensure the safe and stable operation of the device.

Published in Quantum Beam Science

ISSN: 2412-382X (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering
Website: http://www.mdpi.com/journal/qubs

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