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2 PublicationsRecent improvement of Cs2Te photocathodes at HZDR
Xiang, R.; Arnold, A.; Michel, P.; Murcek, P.; Teichert, J.; Lu, P.; Vennekate, H.
Abstract
The ELBE SRF gun has been successfully operated for the radiation source at HZDR. To achieve higher current and lower beam emittance, a new niobium cavity with superconducting solenoid and a new 13 MHz laser have been recently developed. Meanwhile, better photocathodes with high quantum efficiency are urgently in demand. In this work we improve the present Cs2Te preparation system for cleaner environment and more precise stoichiometric control than before. A new mask is designed to prevent cesium pollution of the cathode body. Instead of Kapton only alumina ceramics are used for isolation, and the cathode plugs are degassed at higher temperature. New evaporators are produced for an accurate deposition rate. Furthermore, the cathode transfer system is improved for a better vacuum condition.
Keywords: SRF gun; high current; low beam emittance; Cs2Te photocathode
Involved research facilities
- Radiation Source ELBE DOI: 10.17815/jlsrf-2-58
Related publications
- DOI: 10.17815/jlsrf-2-58 is cited by this (Id 20593) publication
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Contribution to proceedings
5th International Particle Accelerator Conference (IPAC’14), 15.-20.06.2014, Dresden, Germany
Proceedings of IPAC'14, MOPRI025 -
Poster
the 5th International Particle Accelerator Conference (IPAC’14), 15.-20.06.2014, Dresden, Germany
Permalink: https://www.hzdr.de/publications/Publ-20593