Display options
Share it on

Phys Rev Lett. 2013 Sep 13;111(11):114802. doi: 10.1103/PhysRevLett.111.114802. Epub 2013 Sep 13.

Observation of time-domain modulation of free-electron-laser pulses by multipeaked electron-energy spectrum.

Physical review letters

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

Affiliations

  1. INFN-Milano and Università di Milano, Via Celoria, 16 20133 Milano, Italy.

PMID: 24074094 DOI: 10.1103/PhysRevLett.111.114802

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.

Publication Types