Beam dynamics analysis and correction of magnet field imperfections in the SNSaccumulator ring

摘要

Magnet errors and fringe fields can significantly affect the beam dynamics of theSpallation Neutron Source accumulator ring. Using MARYLIE, we model such effects and generate maps, and corresponding tracking data, and then identify the impact on the beams non-linear dynamics. To reduce these effects, we propose and compare several possible correction schemes for the SNS accumulator ring.