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Free-electron laser operation in the intermediate gain region

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4 Author(s)
Dattoli, G. ; ENEA, CRE Frascati, Rome, Italy ; Torre, A. ; Centioli, C. ; Richetta, M.

The modification induced on the well-known antisymmetric gain function of a free-electron laser when the gain coefficient g 0 ranges up to 10 is studied. Deviations from the linear regime for g0⩾0.5 are presented, and a simple perturbative analysis which accounts remarkably well for the corrections to the linear gain formula even for g0=10 is discussed. The effect of inhomogeneous broadening is also discussed

Published in:

Quantum Electronics, IEEE Journal of  (Volume:25 ,  Issue: 11 )