CERN Accelerating science

Published Articles
Report number	TIARA-CONF-WP8-2011-001
Title	Design, Fabrication and High Power RF Test of a C-band Accelerating Structure for Feasibility Study of the SPARC photo-injector energy upgrade
Author(s)	Alesini, D. (INFN/LNF) ; Boni, R. (INFN/LNF) ; Di Pirro, G. (INFN/LNF) ; Di Raddo, R. (INFN/LNF) ; Ferrario, M. (INFN/LNF) ; Gallo, A. (INFN/LNF) ; Lollo, V. (INFN/LNF) ; Marcellini, F. (INFN/LNF) ; Higo, T. (KEK) ; Kakihara, K. (KEK) ; Matsumoto, S. (KEK) ; Campogiani, G. (Rome University La Sapienza) ; Mostacci, A. (Rome University La Sapienza) ; Palumbo, L. (Rome University La Sapienza) ; Persichelli, S. (Rome University La Sapienza) ; Spizzo, V. (Rome University La Sapienza) ; Verdú-Andrés, S. (TERA, Novara and IFIC (CSIC-UV))
Publication	2011
Imprint	2011-09-04
In:	2nd International Particle Accelerator Conference, San Sebastian, Spain, 4 - 9 Sep 2011, pp.MOPC013
Subject category	Accelerators and Storage Rings ; 8: HGA R&D Infrastructure ; 8.1: Study of SPARC upgrade in energy
Abstract	The energy upgrade of the SPARC photo-injector from 160 to more than 260 MeV will be done by replacing a low gradient 3m S-Band structure with two 1.4m high gradient C-band structures. The structures are travelling wave, constant impedance sections, have symmetric waveguide input couplers and have been optimized to work with a SLED RF input pulse. A prototype with a reduced number of cells has been fabricated and tested at high power in KEK (Japan) giving very good performances in terms of breakdown rates (10^6 bpp/m) at high accelerating gradient (>50 MV/m). The paper illustrates the design criteria of the structures, the fabrication procedure and the high power RF test results.

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