rf traveling-wave electron gun for photoinjectors
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 bri...
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American Physical Society
2016-07-01
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Series: | Physical Review Accelerators and Beams |
Online Access: | http://doi.org/10.1103/PhysRevAccelBeams.19.072001 |
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doaj-f44c266962274e42a3c8a774819a87632020-11-24T23:40:42ZengAmerican Physical SocietyPhysical Review Accelerators and Beams2469-98882016-07-0119707200110.1103/PhysRevAccelBeams.19.072001rf traveling-wave electron gun for photoinjectorsMattia SchaerAlessandro CitterioPaolo CraievichSven ReicheLukas StingelinRiccardo ZennaroThe 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 cathode in order to provide the necessary focusing right after emission.http://doi.org/10.1103/PhysRevAccelBeams.19.072001 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Mattia Schaer Alessandro Citterio Paolo Craievich Sven Reiche Lukas Stingelin Riccardo Zennaro |
spellingShingle |
Mattia Schaer Alessandro Citterio Paolo Craievich Sven Reiche Lukas Stingelin Riccardo Zennaro rf traveling-wave electron gun for photoinjectors Physical Review Accelerators and Beams |
author_facet |
Mattia Schaer Alessandro Citterio Paolo Craievich Sven Reiche Lukas Stingelin Riccardo Zennaro |
author_sort |
Mattia Schaer |
title |
rf traveling-wave electron gun for photoinjectors |
title_short |
rf traveling-wave electron gun for photoinjectors |
title_full |
rf traveling-wave electron gun for photoinjectors |
title_fullStr |
rf traveling-wave electron gun for photoinjectors |
title_full_unstemmed |
rf traveling-wave electron gun for photoinjectors |
title_sort |
rf traveling-wave electron gun for photoinjectors |
publisher |
American Physical Society |
series |
Physical Review Accelerators and Beams |
issn |
2469-9888 |
publishDate |
2016-07-01 |
description |
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 cathode in order to provide the necessary focusing right after emission. |
url |
http://doi.org/10.1103/PhysRevAccelBeams.19.072001 |
work_keys_str_mv |
AT mattiaschaer rftravelingwaveelectrongunforphotoinjectors AT alessandrocitterio rftravelingwaveelectrongunforphotoinjectors AT paolocraievich rftravelingwaveelectrongunforphotoinjectors AT svenreiche rftravelingwaveelectrongunforphotoinjectors AT lukasstingelin rftravelingwaveelectrongunforphotoinjectors AT riccardozennaro rftravelingwaveelectrongunforphotoinjectors |
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