BEAM LOSS STUDIES OF THE ISIS SYNCHROTRON USING ORBIT

The ISIS synchrotron forms part of the accelerator chain for the spallation neutron source at RAL in the UK. The synchrotron is an 800 MeV, 50 Hz, RCS accelerating ~2.8x10 13 protons per pulse (ppp). Beam loss is localised to 2 super periods of the ring using a system of collimators. The injection and acceleration processes, vacuum vessels and collimation systems have been modelled using the particle tracking code ORBIT [1]. This paper presents simulation results in comparison to measurements of longitudinal profiles and beam loss.