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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
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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