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Persistent URL http://purl.org/net/epubs/work/53182
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Record Id 53182
Title First Results from III-V Photocathode Preparation Facility for the ALICE ERL Photoinjector
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Abstract ALICE is an En­er­gy Re­cov­ery Linac built at STFC Dares­bury Lab­o­ra­to­ry to in­ves­ti­gate the pro­cess of en­er­gy re­cov­ery. The pro­ject is an ac­cel­er­a­tor re­search fa­cil­i­ty in­tend­ed to de­vel­op the tech­nol­o­gy and ex­per­tise re­quired to build a New Light Source (NLS) in the UK based on a suite of Free-Elec­tron Lasers. Cur­rent­ly the ALICE gun ac­com­mo­dates only a sin­gle pho­to­cath­ode at any one time, and the sys­tem must be vent­ed to at­mo­spher­ic pres­sure for pho­to­cath­ode re­place­ment. To meet the strin­gent vac­u­um de­mands for good pho­to­cath­ode life­time, the sys­tem then re­quires bak­ing for up to three weeks. A new load-lock cath­ode prepa­ra­tion sys­tem has been de­signed as an up­grade to the ALICE gun. The load-lock can ac­com­mo­date up to six pho­to­cath­odes, and per­mits rapid trans­fer of pho­to­cath­odes be­tween the load-lock ac­ti­va­tion cham­ber and the gun, thus main­tain­ing the vac­u­um. The pho­to­cath­ode prepa­ra­tion fa­cil­i­ty was suc­cess­ful­ly com­mis­sioned in spring 2009, and has since per­mit­ted a quan­tum yield of 15% to be achieved at a wave­length of 635 nm. Present­ly, a new gun ves­sel and pho­to­cath­ode trans­port sys­tem is under man­u­fac­ture, with a view to this being ful­ly-in­stalled on ALICE in Spring 2012.
Organisation EID , ASTeC , ASTeC-AP , ASTeC-VS , CI , STFC
Keywords Physics , ASTeC 2010-2011
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Language English (EN)
Type Details URI(s) Local file(s) Year
Paper In Conference Proceedings In 1st International Particle Accelerator Conference (IPAC10), Kyoto, Japan, 23-28 May 2010, (2010). tupe095.pdf 2010