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Persistent URL http://purl.org/net/epubs/work/44016
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Record Id 44016
Title Design of an upgrade to the ALICE photocathode electron gun
Abstract We present the design for an upgrade to the GaAs photocathode electron gun on the ALICE (formerly ERLP) accelerator at Daresbury Laboratory. This proposed upgrade includes installation of a dedicated photocathode preparation facility, with side-loading of the activated photocathodes in to the gun and a reduction of the photocathode diameter from 32 to 10 mm. The preparation facility forms a common vacuum system with the gun, isolated by a gate valve, permitting significant improvement in the gun vacuum and a reduction of caesium vapour contamination improving gun stability at high voltage. This preparation facility will reduce the time required for a photocathode change from weeks to hours. The facility should also provide photocathodes with improved quantum efficiency due to a more controllable preparation procedure, and allows performance of experiments using photocathodes activated to different levels of electron affinity.
Organisation EID , ASTeC , ASTeC-AP , ASTeC-VS , CI , STFC
Keywords Physics , ALICE , ERLP , electron gun , photoinjector , photocathode , upgrade
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Language English (EN)
Type Details URI(s) Local file(s) Year
Paper In Conference Proceedings In 11th European Particle Accelerator Conference (EPAC08), Genoa, Italy, 23-27 Jun 2008, (2008). 2008 EPAC - Desig…ode electron gun.pdf 2008