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Persistent URL http://purl.org/net/epubs/work/51318
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Record Id 51318
Title 3D Modeling of the ALICE Photoinjector Upgrade
Abstract The injector for the ALICE machine (Accelerators and Lasers In Combined Experiments) at Daresbury Laboratory is based around a 350 kV DC photocathode electron gun. An upgrade is proposed to introduce a load-lock GaAs photocathode preparation facility to allow rapid transfer of photocathodes to the gun without breaking the vacuum system. In the current design this requires side-loading of the photocathodes into the cathode ball. An alternative is to relocate the ceramic insulator vertically which will allow back-loading and also back-illumination of the photocathodes. 3D electrostatic simulations of the gun chamber are presented for both options along with 3D beam dynamic simulations for an off-axis photocathode, introduced to increase photocathode lifetime by reducing damage by ion back-bombardment. Beam dynamic simulations are also presented for the entire injector beamline as well as for a proposed extension to the injector beamline to include a diagnostic section.
Organisation ASTeC , ASTeC-AP , CI , STFC
Keywords Physics , ASTeC 2008-2009
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Language English (EN)
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Paper In Conference Proceedings Published by the AiP with the PESP08 submissions as part of the SPIN2008 proceedings AiP Conf. Proc 1149, pp1179-1183. Is in proceedings of: Polarised Electron Sources and Polarimetry, 2008 (PESP 2008), Jefferson Laboratory, Newport News, USA, 4-8 Oct 2008. PESP 038 McKenzie.pdf 2008