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Transverse space charge studies fior the ISIS synchrotron
CM Warsop (CCLRC Rutherford Appleton Lab.)
The ISIS Facility at the Rutherford Appleton Laboratory in the UK produces intense neutron and muon beams for condensed matter research. It is based on a 50 Hz proton synchrotron which, once the commissioning of a new dual harmonic RF system is complete, will accelerate about 3.5E13 protons per pulse (ppp) from 70 to 800 MeV, corresponding to mean beam powers of 0.2 MW. Following this upgrade, transverse space charge is expected to be one of the main intensity limitations, and is also a key factor for further machine upgrades. A programme of R&D on transverse space charge is now under way, aiming not only to improve the ISIS ring but also to exploit it as an experimental tool for testing theory and codes. This paper summarises the work so far, outlining calculations for coherent envelope modes on ISIS and using numerical solutions of the envelope equation to show the expected behaviour near half integer resonance. Progress on linking these predictions with more realistic beam models in space charge codes and experiments is summarised.
Paper In Conference Proceedings
In 10th European Particle Accelerator Conference (EPAC'06), Edinburgh, 26-30 Jun 2006, (2006).
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