Design of an electron gun for terahertz radiation source

An EC-ITC （External-Cathode Independently Tunable Cells） RF gun was employed with the aim of obtaining short-pulse bunches with high peak current for a terahertz radiation source. A gridded DC gun plays a key role as the external injecting electron source of the ITC RF gun, the performance of which...

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Published inChinese physics C Vol. 38; no. 4; pp. 93 - 97
Main Author 李骥 裴元吉 胡桐宁 陈曲珊 冯光耀 尚雷 李成龙
Format Journal Article
LanguageEnglish
Published 01.04.2014
Subjects
Beams (radiation)
Charge
Compressed
Electron beams
Electron sources
Injectors
Radiation sources
Transport
光束质量
太赫兹
峰值电流
电子枪
空间电荷力
网格化
设计
辐射源
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Summary:An EC-ITC （External-Cathode Independently Tunable Cells） RF gun was employed with the aim of obtaining short-pulse bunches with high peak current for a terahertz radiation source. A gridded DC gun plays a key role as the external injecting electron source of the ITC RF gun, the performance of which determines the beam quality in the injector and transport line. In order to make the beam well compressed in the ITC RF gun, the energy of the electrons acquired from the gridded DC gun should be 15 keV at most. A proper structure of the gridded gun with double-anode is shown to overcome the strong space- charge force on the cathode, which is able to generate 6 μs beam with 4.5 A current successfully.
Bibliography:11-5641/O4
LI Ji PEI Yuan-Ji HU Tong-Ning CHEN Qu-Shan FENG Guang-Yao SHANG Lei LI Cheng-Long（1 National Synchrotron Radiation Laboratory, University of Science and Technology of China, Hefei 230029, China 2 State Key Laboratory of Advanced Electromagnetic Engineering and Technology, Huazhong University of Science and Technology, Wuhan 430074, China 3 Deutsches Elektronen-Synchrotron, Hamburg 22607, Germany）
gridded DC gun, RF gun, EC-ITC
An EC-ITC （External-Cathode Independently Tunable Cells） RF gun was employed with the aim of obtaining short-pulse bunches with high peak current for a terahertz radiation source. A gridded DC gun plays a key role as the external injecting electron source of the ITC RF gun, the performance of which determines the beam quality in the injector and transport line. In order to make the beam well compressed in the ITC RF gun, the energy of the electrons acquired from the gridded DC gun should be 15 keV at most. A proper structure of the gridded gun with double-anode is shown to overcome the strong space- charge force on the cathode, which is able to generate 6 μs beam with 4.5 A current successfully.
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1137
0254-3052
DOI:10.1088/1674-1137/38/4/047004