BEAM BUNCH LEAKAGE AND CONTROL IN THE SNS RING

Abstract

In the previous neutron production operations at the SNS, the longitudinal extraction gap of the accumulator ring was contaminated as a result of the linac chopper limitations. This caused significant beam loss and activation in the ring and in the extraction beam line. Simulations with computer models and measurements showed that proper use of the ring RF systems, with additional storage turns after the necessary beam accumulation turns in the ring, effectively reduced beam loss in the accelerator systems. Simulations and beam measurement results will be discussed.