Generation of a femtosecond electron microbunch train from a photocathode using twofold Michelson interferometer

The interest in producing ultrashort electron bunches has risen sharply among scientists working on the design of high-gradient wakefield accelerators. One attractive approach generating electron bunches is to illuminate a photocathode with a train of femtosecond laser pulses. In this paper we descr...

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Bibliographic Details
Published inPhysical review. Accelerators and beams Vol. 20; no. 10; p. 103401
Main Authors Shevelev, M., Aryshev, A., Terunuma, N., Urakawa, J.
Format Journal Article
LanguageEnglish
Published College Park American Physical Society 01.10.2017
Subjects
Accelerators
Cesium
Continuously variable
Electrons
Femtosecond pulses
Lasers
Michelson interferometers
Photocathodes
Tellurides
Titanium-Sapphire
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Summary:The interest in producing ultrashort electron bunches has risen sharply among scientists working on the design of high-gradient wakefield accelerators. One attractive approach generating electron bunches is to illuminate a photocathode with a train of femtosecond laser pulses. In this paper we describe the design and testing of a laser system for an rf gun based on a commercial titanium-sapphire laser technology. The technology allows the production of four femtosecond laser pulses with a continuously variable pulse delay. We also use the designed system to demonstrate the experimental generation of an electron microbunch train obtained by illuminating a cesium-telluride semiconductor photocathode. We use conventional diagnostics to characterize the electron microbunches produced and confirm that it may be possible to control the main parameter of an electron microbunch train.
ISSN:2469-9888
2469-9888
DOI:10.1103/PhysRevAccelBeams.20.103401