The LLRF of five of TRIUMF's ISAC-1 accelerator cavities have been replaced by 3 similar FPGA based system with different operating frequencies. These LLRF use internal digital phase locked loops for frequency generation and synchronization, feedback control using Amplitude/Phase regulations. These FPGAs also have internal stepper motor controller for resonance control. Various modes of resonance control are possible, including phase comparison and minimum seeking slide-mode control. Operational performances including frequency generation and synchronization, amplitude and phase noises, tuning speeds, compatibility to original remote controls, are reported.
@article{arxiv.2310.11735,
title = {Performance of FPGA controller in ISAC-1 accelerator chain},
author = {K. Fong and X. Fu and Q. W. Zheng and T. Au and R. Leewe and TRIUMF and V6T2A3 and Vancouver and Canada},
journal= {arXiv preprint arXiv:2310.11735},
year = {2023}
}
Comments
Poster presented at LLRF Workshop 2023 (LLRF2023, arXiv: 2310.03199)