3 papers
physics.acc-ph2023
Performance of FPGA controller in ISAC-1 accelerator chain
K. Fong, X. Fu, Q. W. Zheng +6
The LLRF of five of TRIUMF's ISAC-1 accelerator cavities have been replaced by 3 similar FPGA based system with different operating frequencies.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 pha…
physics.acc-ph2023
Digital LLRF system for TRIUMF ISIS buncher
Xiaoliang Fu, Ken Fong, Qiwen Zheng +2
The ISIS buncher system at TRIUMF operates at frequencies of 23MHz, 46MHz, and 4.6MHz. The 23MHz and 46MHz signals drive two buncher cavities, while the 4.6MHz signal drives the 5:…
physics.acc-ph2022
Chatter reduction in sliding mode tuner controller using skipping surface
Ken Fong, Ramona Leewe, Qiwen Zheng
TRIUMF ISAC 1 tuning controllers operate using minimum seeking sliding mode controller to minimize the reflected power in their cavities. As with all mini-mum seeking algorithms, c…