Speaker
Description
The China Spallation Neutron Source (CSNS) is a high-power proton accelerator facility for neutron scattering research. The Rapid Cycling Synchrotron (RCS) is equipped with an Ionization Profile Monitor (IPM) for non-destructive measurement of the transverse beam profile. Following the CSNS-II upgrade, the injection beam current will increase to 40 mA, making space-charge-induced distortion a critical issue for accurate IPM measurements. In this work, numerical simulations were performed using an IPM simulation code to investigate the IPM response during the RCS painting injection process. The deviations between the reconstructed IPM profiles and the reference beam distributions were quantitatively evaluated under various beam conditions for both ion and electron collection modes. The simulation results provide a quantitative assessment of space-charge-induced measurement errors and demonstrate the performance of the two collection modes under high-intensity beam conditions, providing guidance for the interpretation of IPM measurements and the optimization of IPM operation in the CSNS-II RCS.
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