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Parametrizing the gain dependences in a single passage FEL operating with moderate current e-beams

1989; Elsevier BV; Volume: 285; Issue: 1-2 Linguagem: Inglês

10.1016/0168-9002(89)90434-8

1872-9576

G. Dattoli, H. Fang, L. Giannessi, M. Richetta, A. Torre, R. Caloi,

Gyrotron and Vacuum Electronics Research

In this paper we analyze an FEL operating in the moderate gain regime (0 < g0 < 10) and discuss the modification induced on the well-known antisymmetric gain formula by nonlinear contributions in the gain coefficient. The gain degradations due to e-beam energy spread and emittances are also included, as well as those due to finite electron pulse effects. Final comments on the attainable laser pulse length and bandwidth are also presented.