Characteristics of terahertz coherent transition radiation generated from picosecond ultrashort electron bunches |
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| Authors: | Liu Wen-Xin Tang Chuan-Xiang and Huang Wen-Hui |
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| Institution: | 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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| Keywords: | coherent transition radiation photocathode radio-frequency
gun ultrashort electron bunches particle-in-cell |
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