HB2025 - the 71st ICFA Advanced Beam Dynamics workshop on High-Intensity and High-Brightness Hadron Beams

RF system of magnetic alloy loaded cavity in CSNS

THIBC01

Oct 23, 2025, 11:00 AM

30m

room C (conference center)

Invited Oral Presentation WGC:Accelerator Systems THIBC WGC invited oral

Speaker

Bin Wu (Institute of High Energy Physics)

Description

With the implementation of the dual harmonic RF system utilizing the magnetic alloy (MA)-loaded cavity in the China Spallation Neutron Source (CSNS) Rapid Cy-cling Synchrotron (RCS), space charge effects have been effectively mitigated, and the beam power has been progressively increased to 160 kW with stable operation. However, strong beam loading poses a major challenge at higher power levels. To ensure stable operation under these conditions, we have developed an operational analysis model of the RF system using LTspice, which integrates the MA-loaded cavity, power source, low-level radio frequency (LLRF) system, and beam. The model's accuracy was validated through detailed comparison with experimental data from beam operation. This model provides a critical tool for optimizing RF system design under high beam current, and studies based on it have already yielded preliminary progress