CERN Accelerating science

Published Articles
Report number	CERN-ACC-2017-0048
Title	Femtosecond timing-jitter between photo-cathode laser and ultra-short electron bunches by means of hybrid compression
Author(s)	Pompili, Riccardo (Laboratory Nazionali di Frascati) ; Anania, M.P (Laboratory Nazionali di Frascati) ; Bellaveglia, M (Laboratory Nazionali di Frascati) ; Biagioni, A (Laboratory Nazionali di Frascati) ; Castorina, G (Laboratory Nazionali di Frascati and University of Catania) ; Chiadroni, E (Laboratory Nazionali di Frascati) ; Cianchi, A (University of Rome Tor Vergata) ; Croia, M (Laboratory Nazionali di Frascati) ; Di Giovenale, D (Laboratory Nazionali di Frascati) ; Ferrario, M (Laboratory Nazionali di Frascati) ; Filippi, F (University of Rome Sapienza) ; Gallo, A (Laboratory Nazionali di Frascati) ; Gatti, G (Laboratory Nazionali di Frascati) ; Giorgianni, F (University of Rome Sapienza) ; Giribono, A (University of Rome Sapienza) ; Li, W (NSRL, Hefei, China) ; Lupi, S (University of Rome Sapienza) ; Mostacci, A (University of Rome Sapienza) ; Petrarca, M (University of Rome Sapienza) ; Piersanti, L (University of Rome Sapienza) ; Di Pirro, G (Laboratory Nazionali di Frascati) ; Romeo, S (Laboratory Nazionali di Frascati) ; Scifo, J (Laboratory Nazionali di Frascati) ; Shpakov, V (Laboratory Nazionali di Frascati) ; Vaccarezza, C (Laboratory Nazionali di Frascati) ; Villa, F (Laboratory Nazionali di Frascati)
Publication	2017
Imprint	2016-08-12
In:	New J. Phys. 18 (2016) 083033
DOI	10.1088/1367-2630/18/8/083033
Subject category	Accelerators and Storage Rings ; 13: Novel Acceleration Techniques (ANAC2) ; 13.1: Coordination and Communication
Abstract	The generation of ultra-short electron bunches with ultra-low timing-jitter relative to the photo-cathode (PC) laser has been experimentally proved for the first time at the SPARC_LAB test-facility (INFN-LNF, Frascati) exploiting a two-stage hybrid compression scheme. The first stage employs RF-based compression (velocity-bunching), which shortens the bunch and imprints an energy chirp on it. The second stage is performed in a non-isochronous dogleg line, where the compression is completed resulting in a final bunch duration below 90 fs (rms). At the same time, the beam arrival timing-jitter with respect to the PC laser has been measured to be lower than 20 fs (rms). The reported results have been validated with numerical simulations.

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