Characteristics of terahertz coherent transition radiation generated from picosecond ultrashort electron bunches

doi:10.1088/1674-1056/19/6/062902

中国物理B ›› 2010, Vol. 19 ›› Issue (6): 62902-062902.doi: 10.1088/1674-1056/19/6/062902

Characteristics of terahertz coherent transition radiation generated from picosecond ultrashort electron bunches

刘文鑫, 唐传祥, 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 Radiat

收稿日期:2009-07-15 出版日期:2010-06-15 发布日期:2010-06-15
基金资助:
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

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

Received:2009-07-15 Online:2010-06-15 Published:2010-06-15
Supported by:
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

摘要/Abstract

摘要： 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.

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.

Key words: coherent transition radiation, photocathode radio-frequency gun, ultrashort electron bunches, particle-in-cell

中图分类号: (Beam handling; beam transport)

29.27.Eg

85.60.Ha (Photomultipliers; phototubes and photocathodes) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression) 41.75.Fr (Electron and positron beams)

刘文鑫, 唐传祥, 黄文会. Characteristics of terahertz coherent transition radiation generated from picosecond ultrashort electron bunches[J]. 中国物理B, 2010, 19(6): 62902-062902.

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[J]. Chin. Phys. B, 2010, 19(6): 62902-062902.

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Characteristics of terahertz coherent transition radiation generated from picosecond ultrashort electron bunches

Characteristics of terahertz coherent transition radiation generated from picosecond ultrashort electron bunches

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