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Persistent URL http://purl.org/net/epubs/work/43797
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Record Id 43797
Title Analysis of measurement errors in residual gas ionisation profile monitors in a high intensity proton beam
Abstract ISIS is the pulsed neutron and muon source based at the Rutherford Appleton Laboratory in the UK. Operation is centred on a loss-limited 50 Hz proton synchrotron which accelerates ~ 3e13 protons per pulse from 70 MeV to 800 MeV, corresponding to a mean beam power of 0.2 MW. Beam profile measurements are a key component of both ISIS operational running and R&D beam studies. Understanding and quantifying limitations in these monitors is essential, and has become more important as work to optimise and study the beam in more detail has progressed. This paper presents 3D field and ion trajectory modelling of the ISIS residual gas ionisation profile monitors, including the effects of non-uniformity in longitudinal and transverse drift fields, and beam space charge. The simulation model allows comparison between the input beam profile and that deduced from ion currents. The resulting behaviour is summarised along with corrections and errors.
Organisation ISIS , ISIS-ACCEL , STFC
Keywords Residual gas , Physics , Profile monitors , Ionisation
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Language English (EN)
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Paper In Conference Proceedings In 11th European Particle Accelerator Conference (EPAC '08), Genoa, Italy, 23-27 Jun 2008, (2008). TUPC109.pdf 2008