High-gain harmonic-generation free-electron laser seeded by harmonics generated in gas

M. Labat 1, 2 M. Bellaveglia 3 M. Bougeard 4 B. Carré 4 F. Ciocci 1 E. Chiadroni 3 A. Cianchi 3, 5 M.E. Couprie 2 L. Cultrera 3 M. del Franco 1 G. Di Pirro 3 A. Drago 3 M. Ferrario 3 D. Filippetto 3 F. Frassetto 6 A. Gallo 3 D. Garzella 4 G. Gatti 3 L. Giannessi 1 Guillaume Lambert 7 A. Mostacci 8 A. Petralia 9 V. Petrillo 10, 11 L. Poletto 6 M. Quattromini 1 J.V. Rau 12 C. Ronsivalle 1 E. Sabia 1 M. Serluca 8 I. Spassovsky 1 V. Surrenti 1 C. Vaccarezza 3 C. Vicario 13
1 ENEA - Italian National agency for new technologies, Energy and sustainable economic development [Frascati]
2 SSOLEIL - Synchrotron SOLEIL
3 LNF - Laboratori Nazionali di Frascati
4 SPCSI - Service de Physique et de Chimie des Surfaces et Interfaces
5 INFN, Sezione di Roma Tor Vergata - Istituto Nazionale di Fisica Nucleare, Sezione di Roma Tor Vergata
6 IFN - CNR Istituto di Fotonica e Nanotecnologie [Padova]
7 LOA - Laboratoire d'optique appliquée
8 Università degli Studi di Roma "La Sapienza" [Rome]
9 ENEA C.R. Frascati, Via E. Fermi, 45, 00044 Frascati, Roma, Italy
10 Università degli studi di Milano [Milano]
11 INFN-Mi, Via Celoria, 16 20133 Milano, Italy
12 CNR-ISM - Istituto di Struttura della Materia
13 PSI - Paul Scherrer Institute
Abstract : The injection of a seed in a free-electron laser (FEL) amplifier reduces the saturation length and improves the longitudinal coherence. A cascaded FEL, operating in the high-gain harmonic-generation regime, allows us to extend the beneficial effects of the seed to shorter wavelengths. We report on the first operation of a high-gain harmonic-generation free-electron laser, seeded with harmonics generated in gas. The third harmonics of a Ti:sapphire laser, generated in a gas cell, has been amplified and up-converted to its second harmonic (?rad=133nm) in a FEL cascaded configuration based on a variable number of modulators and radiators. We studied the transition between coherent harmonic generation and superradiant regime, optimizing the laser performances with respect to the number of modulators and radiators. © 2011 American Physical Society.
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Journal articles
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https://hal-ensta-paris.archives-ouvertes.fr//hal-00964902
Contributor : Aurélien Arnoux <>
Submitted on : Friday, March 28, 2014 - 10:39:43 AM
Last modification on : Wednesday, July 3, 2019 - 10:48:02 AM

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CNRS | X-LOA | ENSTA_LOA | X | ENSTA | PARISTECH | DSM-IRAMIS | CEA | SPCSI | SYNCHROTRON-SOLEIL | CEA-DRF | X-DEP-PHYS

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M. Labat, M. Bellaveglia, M. Bougeard, B. Carré, F. Ciocci, et al.. High-gain harmonic-generation free-electron laser seeded by harmonics generated in gas. Physical Review Letters, American Physical Society, 2011, 107 (22), ⟨10.1103/physrevlett.107.224801⟩. ⟨hal-00964902⟩

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