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

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【Author】 Liu Wen-Xin,Tang Chuan-Xiangand Huang Wen-Hui 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

【机构】 Department of Engineering Physics,Tsinghua University； Key Laboratory of Particle & Radiation Imaging (Tsinghua University),Ministry of Education,Tsinghua University； Key Laboratory of High Energy Radiation Imaging Fundamental Science for National Defense,Tsinghua University；

【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.更多还原

【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.更多还原

【关键词】 coherent transition radiation； photocathode radio-frequency gun； ultrashort electron bunches； particle-in-cell；
【Key words】 coherent transition radiation； photocathode radio-frequency gun； ultrashort electron bunches； particle-in-cell；

【基金】 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);China Postdoctoral Science Foundation (Grant No.20080440031);China Postdoctoral Special Science Foundation (Grant No.200902088)

【文献出处】 Chinese Physics B ,中国物理B , 编辑部邮箱 ,2010年06期

【分类号】TN21
【被引频次】4
【下载频次】29

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