Design of Fast Corrector Magnet Power Supply for HEPS Storage Ring

The high energy photon source (HEPS) has an ultra-low emittance of 0.1 nm·rad, which puts forward high requirement for beam stability. A high performance fast corrector magnet power supply was developed to improve the performance of the fast orbit feedback system to improve the beam stability. The prototype adopted a novel multi-level cascade topology structure to improve the dynamic performance, and a novel control method based on digital control was used to improve the dynamic performance of the prototype. Software simulation and the prototype test data show that the prototype has a small signal bandwidth of 10 kHz, step response time lower than 70 μs, output current ripple of less than 20 ppm. The power supply prototype can meet the requirement of HEPS.