TY - JOUR
AU - 
AB - PHYSICAL REVIEW ACCELERATORS AND BEAMS 19, 072001 (2016) Mattia Schaer, Alessandro Citterio, Paolo Craievich, Sven Reiche, Lukas Stingelin, and Riccardo Zennaro Paul Scherrer Institut, CH5232 Villigen PSI, Switzerland (Received 21 December 2015; published 12 July 2016) The design of a photoinjector, in particular that of the electron source, is of central importance for free electron laser (FEL) machines where a high beam brightness is required. In comparison to standard designs, an rf traveling-wave photocathode gun can provide a more rigid beam with a higher brightness and a shorter pulse. This is illustrated by applying a specific optimization procedure to the SwissFEL photoinjector, for which a brightness improvement up to a factor 3 could be achieved together with a double gun output energy compared to the reference setup foreseeing a state-of-the-art S-band rf standing-wave gun. The higher brightness is mainly given by a (at least) double peak current at the exit of the gun which brings benefits for both the beam dynamics in the linac and the efficiency of the FEL process. The gun design foresees an innovative coaxial rf coupling at both ends of the structure which allows a solenoid with integrated bucking coil to be placed around the 
TI - rf traveling-wave electron gun for photoinjectors
JO - Physical Review Accelerators and Beams
DO - 10.1103/physrevaccelbeams.19.072001
DA - 2016-07-12
UR - https://www.deepdyve.com/lp/unpaywall/rf-traveling-wave-electron-gun-for-photoinjectors-LkFDMVe0MH
DP - DeepDyve
ER -