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

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

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.

Keywords: coherent transition radiation photocathode radio-frequency gun ultrashort electron bunches particle-in-cell

Received: 15 July 2009
Accepted manuscript online:

PACS:	29.27.Eg	(Beam handling; beam transport)
	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)

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

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