We discuss a new method for the production of trains of FEL radiation pulses based on the FEL emission driven by a comb-like electron beam. In addition, we present recent experimental results on the two color FEL emission as generated at the SPARC LAB facility: A train of two short (<200 fs) electron bunches, almost overlapped in time, with a comb-like energy distribution, has been injected in the undulator, giving rise to FEL pulses at two characteristic frequencies with multi-peaked time structure. This scheme shows also the versatility of the SPARC photo-injector to generate and manipulate such energy and time distributions.
Two color FEL driven by a comb-like electron beam distribution / E. Chiadroni, M.P. Anania, M. Artioli, A. Bacci, M. Bellaveglia, A. Cianchi, F. Ciocci, G. Dattoli, D. Di Giovenale, G. Di Pirro, M. Ferrario, G. Gatti, L. Giannessi, A. Mostacci, P. Musumeci, L. Palumbo, A. Petralia, V. Petrillo, R. Pompili, C. Ronsivalle, A.R. Rossi, C. Vaccarezza, F. Villa. - In: PHYSICS PROCEDIA. - ISSN 1875-3892. - 52:(2014), pp. 27-35. ((Intervento presentato al convegno Workshop on Physics and Applications of High Brightness Beams : Towards a 5th Generation Light Source tenutosi a San Juan nel 2013 [10.1016/jphpro.2014.06.006].
Two color FEL driven by a comb-like electron beam distribution
A. Bacci;V. Petrillo;A.R. Rossi;
2014
Abstract
We discuss a new method for the production of trains of FEL radiation pulses based on the FEL emission driven by a comb-like electron beam. In addition, we present recent experimental results on the two color FEL emission as generated at the SPARC LAB facility: A train of two short (<200 fs) electron bunches, almost overlapped in time, with a comb-like energy distribution, has been injected in the undulator, giving rise to FEL pulses at two characteristic frequencies with multi-peaked time structure. This scheme shows also the versatility of the SPARC photo-injector to generate and manipulate such energy and time distributions.
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