Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2008, Vol. 19 ›› Issue (5): 266 doi: 10.1016/S1001-8042(09)60002-6


Field evolution of harmonic radiation in an HGHG FEL

DENG Haixiao1,2 LI Dongguo1 DAI Zhimin1,*   

  1. 1 Shanghai Institute of Applied Physics,Chinese Academy of Sciences, Shanghai 201800, China
    2 Graduate University of the Chinese Academy of Sciences, Beijing100049, China
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DENG Haixiao LI Dongguo DAI Zhimin. Field evolution of harmonic radiation in an HGHG FEL.Nuclear Science and Techniques, 2008, 19(5): 266     doi: 10.1016/S1001-8042(09)60002-6

Abstract: As a natural character of high gain free electron laser (FEL), harmonic radiation is regarded as the natural extensions to short wavelengths. In high gain harmonic generation (HGHG) scheme, harmonic evolution may be attributed to the initial harmonic bunching, self amplification of the harmonic radiation, electron beam strongly bunched by the fundamental radiation, the faster longitudinal dynamics and the fundamental synchrotron oscillation. It is more complex than harmonic evolution in other FEL schemes. In this paper, via theoretical analyses and three dimensional simulations, a general description of different aspects of harmonic evolution in the HGHG process is presented.

Key words: Harmonic, FEL, HGHG, Nonlinearity