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

The slow extraction feedback system at HIRFL-CSR

THPT64

Oct 23, 2025, 3:30 PM

2h

third floor (conference center)

Poster Presentation WGE: Beam Instrumentation, beam Interaction and AI technology THPT poster session

Speaker

Tong Liu (Institute of Modern Physics, Chinese Academy of Sciences)

Description

The slow extraction feedback system is built at HIRFL-CSR, Lanzhou. It is an auto adjusted feedback system based on the predicted value from DCCT at CSRm. The TMIC with the ability of online monitoring spill structure and beam profile is equipped at the terminal. The 10 kHz intensity signal is fed into the electronics of RFKO with a 1 kW power amplifier. The system is operated at July, 2025. In the commissioning, the beam is strongly stable at the initial period is found by the feedback system. By adjusting the sextupole ramping, the duty factor of the spill is increased from 80% to 90%. Further work is discussed with beam dynamic fellows to apply the feedback system sub 1E6 pps.