WEOCNO01
BNL, Upton, Long Island, New York, USA
[1] L.H. Yu et al., science, 289 (2000)
[2] J. Feldhaus et al., NIMA, 1997
[3] V. N. Litvinenko et al., Phys. Rev. Lett. 102, 114801 (2009)
[4] S.Reiche, Genesis 2.0
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WEOCNO01 |
Simulation Studies of FEL Green Function and Its Saturation | |
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FEL amplifiers can be used for a number of applications ranging from the HGHG [1] , the coherent seed amplifying [2] or amplifier in Coherent electron Cooler [3]. Linear response of an FEL amplifier can be described using its Green function. In this paper we present results of detailed studies of the evolution and saturation of the Green function in FEL as function of its length. We are using time resolved mode of the code Genesis [4] for these studies, which include delta-function like seed and shot noise in electron beam. We simulate a statistically representative set of initial shot noise with and without the seed, and extract the Green function amplitude and phase evolution, as well as their fluctuation. We present results for three spectral ranges: the IR, the visible and the soft X-rays. We summarize our finding and compare them with a simple theoretical formula.
[1] L.H. Yu et al., science, 289 (2000) [2] J. Feldhaus et al., NIMA, 1997 [3] V. N. Litvinenko et al., Phys. Rev. Lett. 102, 114801 (2009) [4] S.Reiche, Genesis 2.0 |
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Slides WEOCNO01 [0.479 MB] | |