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Characteristics of terahertz coherent transition radiation generated from picosecond ultrashort electron bunches |
Liu Wen-Xin(刘文鑫)†, Tang Chuan-Xiang(唐传祥), and Huang Wen-Hui(黄文会) |
Department of Engineering Physics, Tsinghua University, Beijing 100084, China; Key Laboratory of Particle & Radiation Imaging (Tsinghua University), Ministry of Education, Tsinghua University, Beijing 100084, China; Key Laboratory of High Energy Radiation Imaging Fundamental Science for National Defense, Tsinghua University, Beijing 100084, China
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Abstract This paper presents a method of generating terahertz (THz) coherent transition radiation (CTR) from picosecond ultrashort electron bunches including single and train bunches, which are produced by a photocathode radio frequency gun. The radiation characteristics of THz CTR including formation factor and energy spectrum are analysed in detail. With the help of a 2-dimensional particle-in-cell simulation, the radiation characteristics including power, energy and magnetic field are analysed. The results show that the radiation frequency can be adjusted by tuning the repetition frequency of the train bunch and the energy can be enhanced with the train bunches.
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Received: 15 July 2009
Accepted manuscript online:
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PACS:
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29.27.Eg
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(Beam handling; beam transport)
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85.60.Ha
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(Photomultipliers; phototubes and photocathodes)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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41.75.Fr
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(Electron and positron beams)
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Fund: Project supported by the Key
Program of National Natural Science Foundation of China (Grant
No.~10705050), National Natural Science Foundation of China (Grant
Nos.~10875070, 10805031, and 10905032), by China Postdoctoral
Science Foundation (Grant No.~2008 |
Cite this article:
Liu Wen-Xin(刘文鑫), Tang Chuan-Xiang(唐传祥), and Huang Wen-Hui(黄文会) Characteristics of terahertz coherent transition radiation generated from picosecond ultrashort electron bunches 2010 Chin. Phys. B 19 062902
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