Study on the anti-correlated painting injection scheme for the Rapid Cycling Synchrotron of the China Spallation Neutron Source

In the rapid cycling synchrotron of China Spallation Neutron Source, anti-correlated painting was adopted for design scheme injection system. beam commissioning, with optimization painting,the loss has been well controlled and efficiency exceeded 99%. Combined other aspects adjustments, power on target reached 50 kW smoothly. this paper, we have studied in commissioning. Compared to simulation results scheme, transverse distribution, coupling effect commissioning are somewhat different. Through machine studies, carefully analyzed these differences their reasons.