Study on the maximum stable output of a novel s-band micro-pulse electron gun

Deyu Yang; Boting Li; Jifei Zhao; Kui Zhou; Ziqin Yang; Weiwei Tan; Yujia Yang; Xiangyang Lu

doi:10.1063/1.5028150

AIP Advances (Jul 2018)

Study on the maximum stable output of a novel s-band micro-pulse electron gun

Deyu Yang,
Boting Li,
Jifei Zhao,
Kui Zhou,
Ziqin Yang,
Weiwei Tan,
Yujia Yang,
Xiangyang Lu

Affiliations

Deyu Yang: State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
Boting Li: State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
Jifei Zhao: State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
Kui Zhou: Institute of Applied Electronics, China Academy of Engineering Physics, Mianyang 621900, China
Ziqin Yang: State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
Weiwei Tan: State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
Yujia Yang: State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China
Xiangyang Lu: State Key Laboratory of Nuclear Physics and Technology, Peking University, Beijing 100871, China

DOI: https://doi.org/10.1063/1.5028150
Journal volume & issue: Vol. 8, no. 7
pp. 075313 – 075313-13

Abstract

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A novel S-Band Micro-Pulse electron Gun (MPG) which works at the left crossover point energy EcI on the Secondary Electron Yield (SEY) curve was proposed. The working principles of the MPG were presented. The maximum output beam current limited by space charge effects and beam loading effects was investigated by theoretical analysis. The result shows that the maximum beam current is decided by the parameters of the MPG such as resonant frequency, cavity length, shunt impedance and the secondary emission property of the cathode and grid, having nothing to do with the power flowed into the cavity. The low shunt impedance and the low slope of the SEY curve can help increasing the maximum beam current. According to the principles, a MPG with the frequency of 2.856 GHz has been designed and constructed. The steady working state was achieved by using oxygen free copper and molybdenum grid with different transmission coefficient. It was found a good agreement between the analysis and the experiments.

Published in AIP Advances

ISSN: 2158-3226 (Online)
Publisher: AIP Publishing LLC
Country of publisher: United States
LCC subjects: Science: Physics
Website: http://aipadvances.aip.org/

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