Cesium telluride cathodes for the next generation of high-average current high-brightness photoinjectors

Journal Article · Mon Jul 27 00:00:00 EDT 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4927700· OSTI ID:22486380

Qian, H.; Sannibale, F. ^[1]

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1. Lawrence Berkeley National Laboratory, One Cyclotron Road, Berkeley, California 94720 (United States)

We report on the performances of a Cs{sub 2}Te photocathode under extreme conditions of high peak time-dependent accelerating fields, continuous wave operations, and MHz pulse extraction with up to 0.3 mA average current. The measurements, performed in a normal conducting cavity, show extended lifetime and robustness, elucidate the main mechanisms for cathode degradation, and set the required system vacuum performance for compatibility with the operations of a high average power X-ray free electron laser user facility, opening the doors to the next generation of MHz-scale ultrafast scientific instruments.

• OSTI ID: 22486380
• Journal Information: Applied Physics Letters, Vol. 107, Issue 4; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
BRIGHTNESS
CESIUM
CESIUM TELLURIDES
CURRENTS
FREE ELECTRON LASERS
LIFETIME
MHZ RANGE
PEAKS
PERFORMANCE
PHOTOCATHODES
PULSES
TIME DEPENDENCE
X RADIATION