We present the experimental demonstration of a new scheme for the generation of ultrashort pulse trains based on free-electron-laser (FEL) emission from a multipeaked electron energy distribution. Two electron beamlets with energy difference larger than the FEL parameter ρ have been generated by illuminating the cathode with two ps-spaced laser pulses, followed by a rotation of the longitudinal phase space by velocity bunching in the linac. The resulting self-amplified spontaneous emission FEL radiation, measured through frequency-resolved optical gating diagnostics, reveals a double-peaked spectrum and a temporally modulated pulse structure.
Observation of time-domain modulation of free-electron-laser pulses by multipeaked electron-energy spectrum / V. Petrillo, M.P. Anania, M. Artioli, A. Bacci, M. Bellaveglia, E. Chiadroni, A. Cianchi, F. Ciocci, G. Dattoli, D. Di Giovenale, G. Di Pirro, M. Ferrario, G. Gatti, L. Giannessi, A. Mostacci, P. Musumeci, A. Petralia, R. Pompili, M. Quattromini, J.V. Rau, C. Ronsivalle, A.R. Rossi, E. Sabia, C. Vaccarezza, F. Villa. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 111:11(2013 Sep 13), pp. 114802.1-114802.5.
Observation of time-domain modulation of free-electron-laser pulses by multipeaked electron-energy spectrum
V. PetrilloPrimo
;
2013
Abstract
We present the experimental demonstration of a new scheme for the generation of ultrashort pulse trains based on free-electron-laser (FEL) emission from a multipeaked electron energy distribution. Two electron beamlets with energy difference larger than the FEL parameter ρ have been generated by illuminating the cathode with two ps-spaced laser pulses, followed by a rotation of the longitudinal phase space by velocity bunching in the linac. The resulting self-amplified spontaneous emission FEL radiation, measured through frequency-resolved optical gating diagnostics, reveals a double-peaked spectrum and a temporally modulated pulse structure.File | Dimensione | Formato | |
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