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. RauC. Ronsivalle, A.R. Rossi, E. Sabia, C. Vaccarezza, F. Villa

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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. © 2013 American Physical Society.
Original languageEnglish
Article number114802
Pages (from-to)-
JournalPhysical Review Letters
Volume111
Issue number11
DOIs
Publication statusPublished - 13 Sep 2013
Externally publishedYes

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Petrillo, V., Anania, M. P., Artioli, M., Bacci, A., Bellaveglia, M., Chiadroni, E., ... Villa, F. (2013). Observation of time-domain modulation of free-electron-laser pulses by multipeaked electron-energy spectrum. Physical Review Letters, 111(11), -. [114802]. https://doi.org/10.1103/PhysRevLett.111.114802