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Persistent URL http://purl.org/net/epubs/work/50346
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Record Id 50346
Title Studies of space charge loss mechanisms associated with half integer resonance on the ISIS RCSS
Abstract ISIS is the spallation neutron source at the Rutherford Appleton Laboratory in the UK. Operation centres on a 50 Hz proton synchrotron, which accelerates ~3E13 ppp (protons per pulse) from 70 to 800 MeV, corresponding to beam powers of 0.2 MW. Beam loss imposes limits on operational intensity, and a main contributing mechanism is the action of half integer resonance under high space charge. The same loss mechanism is also a potential problem in ISIS upgrade scenarios involving either higher energy injection into the existing ring, or the addition of a new 3 GeV, high intensity RCS (rapid cycling synchrotron). Progress on PIC (particle in cell) simulation studies investigating the effects of the driven coherent envelope motion, the associated parametric halo, along with implications of momentum spread, is reported. Where possible, comparisons are made with relevant theoretical models. Closely related benchmarking work, experimental studies and plans are also summarised.
Organisation ISIS , ISIS-ACCEL , STFC
Keywords Physics , proton synchrotron , high intensity , beam loss , space charge
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Language English (EN)
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Paper In Conference Proceedings In Particle Accelerator Conference (PAC 2009), Vancouver, Canada, 4-8 May 2009, (2009). FR5PFP044.pdf 2009