Time-domain measurement of a self-amplified spontaneous emission free-electron laser with an energy-chirped electron beam and undulator tapering

Journal Article · Mon Sep 24 04:00:00 EDT 2012 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4754612· OSTI ID:22080468

Marcus, G; Rosenzweig, J B ^[1]; Artioli, M; Ciocci, F; Del Franco, M; Giannessi, L; Petralia, A; Quattromini, M ^[2]; Bacci, A; Bellaveglia, M; Chiadroni, E; Di Pirro, G; Ferrario, M; Filippetto, D; Gatti, G; Rossi, A R ^[3]; Cianchi, A ^[4]; Labat, M ^[2]; Mostacci, A ^[5]; Petrillo, V ^[6] ; others, and

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1. Particle Beam Physics Laboratory, Department of Physics and Astronomy, University of California Los Angeles, Los Angeles, California 90095 (United States)
2. ENEA C.R. Frascati, Via E. Fermi, 45 00044 Frascati, RM (Italy)
3. INFN-LNF, Via E. Fermi, 40 00044 Frascati, RM (Italy)
4. INFN-Roma Tor Vergata and University of Rome Tor Vergata, Via della Ricerca Scientifica, 1-00133 Rome (Italy)
5. Universita degli Studi di Roma La Sapienza, P.le Aldo Moro 5, 00185 Roma (Italy)
6. Universita degli Studi di Milano and INFN-MI, Via Celoria, 16 20133 Milano (Italy)

We report, with an unequivocal time-domain measurement, that an appropriately chosen undulator taper can compensate for an electron beam longitudinal energy-chirp in a free-electron laser amplifier, leading to the generation of single-spike radiation close to the Fourier limit. The measurements were taken using the frequency-resolved optical gating technique by employing an advanced transient-grating diagnostic geometry. The reconstructed longitudinal radiation characteristics are compared in detail to prediction from time-dependent three-dimensional simulations.

• OSTI ID: 22080468
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 13 Vol. 101; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
ELECTRON BEAMS
FOURIER TRANSFORMATION
FREE ELECTRON LASERS
MODULATION
SIMULATION
SUPERRADIANCE
THREE-DIMENSIONAL CALCULATIONS
TIME DEPENDENCE
WIGGLER MAGNETS