Design of proton beam collimation system for HIAF-BRing

Background The Booster Ring is further designed to store and accelerate protons up to 2 × 10¹² particles per pulse in the High-Intensity heavy-ion Accelerator Facility project, which was originally designed to accelerate high-intensity heavy ion beams.
Purpose and Methods To minimize the uncontrolled proton beam halo loss around the ring in operation, a two-stage collimation system is proposed to provide a well-shielded dump for localizing the proton beam halo loss.
Results and conclusion In this paper, the simulation is carried out to evaluate the collimation system which shows a 92.93% collimation efficiency. Finally, several factors that affect the collimation efficiency are taken into consideration, including the physical aperture, the offset and rotation errors of the collimators, the closed orbit distortion, as well as the Betatron tunes.