Femtosecond timing-jitter between photo-cathode laser and ultra-short electron bunches by means of hybrid compression. (12th August 2016)

• Record Type: Journal Article
• Authors: Pompili, R; Anania, M P; Bellaveglia, M; Biagioni, A; Castorina, G; Chiadroni, E; Cianchi, A; Croia, M; Giovenale, D Di; Ferrario, M; Filippi, F; Gallo, A; Gatti, G; Giorgianni, F; Giribono, A; Li, W; Lupi, S; Mostacci, A; Petrarca, M; Piersanti, L; Pirro, G Di; Romeo, S; Scifo, J; Shpakov, V; Vaccarezza, C; Villa, F
• Is Part Of: New journal of physics. Volume 18:Number 8(2016:Aug.)
• Publication Date: 2016-08-12
• Subjects: beam dynamics -- velocity-bunching -- magnetic compression -- synchronization -- timing jitter -- photo-injector; 29.20.Ej -- 42.65.-k -- 78.20.Jq -- 29.27.Bd; Physics -- Periodicals; Physics; Periodicals; 530.05
• DOI: 10.1088/1367-2630/18/8/083033
• Languages: English
• ISSNs: 1367-2630

Abstract

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.