Both large-scale facilities, CiADS and HIAF, have a SC linac with current range from tens µA to 20 mA demanding a big dynamic for BPM. The HIAF booster ring accelerates all ion beams from MeV/u to GeV/u, resulted an unprecedented challenge to BPM with induced voltage in range of 40 uV – 40 V. Four types of pickups are designed, with the capacitive pickups inside the quadrupoles, the titanium button BPMs inside the CMs with a compact geometry, a complex structure integrated with BPM, a water-cooled niobium ring and vacuum pumps within 300 mm between the CMs. The SiO2 cables under 2 K are developed by the joint R&D with a domestic company. For the synchrotron, a diagonal-cut BPM is designed with a good position linearity, low beam impedance, good vacuum performance up to 5.0E-12 mbar, as well as good mechanical properties with the electrode coaxiality less than 0.2 mm. To obtain precise and reliable position measurement, the dedicated electronics are developed for the position and phase measurement in linac, and the turn-by-turn trajectory and orbit measurement for synchrotrons. Moreover, the non-linearity calibration due to the approaching effect and fringe field is carried out and a high-order polynomial correction algorithm is implemented on FPGA to get the real-time accurate position for beam offsets. Furthermore, both newly developed BPM electronics have self-testing and self-calibration functions. Presently the BPM system is preparing for the installation.

The machine protection system guarantees the safe operation of the HIAF (High Intensity heavy-ion Accelerator Facility) in different operating modes and also prevents damage to the online equipment in the event of a failure. Beam current data such as beam current position and phase is an important basis for analysing and diagnosing accelerator faults. In this paper, the authors designed the beam position and phase interlock monitoring system. The system is based on circular buffer and AXI4 protocol to realize the interaction of interlock data and locking of interlock status. At the same time, the system uses memory mapping to save the interlock beam data. Laboratory tests show that the system could save the beam position, beam phase, SUM signals and amplitude of sensed signal per probe path during interlocking before and after 8ms and latch the interlock status of 25 channels. The system was deployed at the CAFe-LINAC gas pedal in March 2024 to complete online measurements.

The Proton Radiation Effects Facility (PREF) aiming for the displacement damage effect research was proposed by XTIPC (Xinjiang Technical Institute of Physics and Chemistry, Chinese Academy of Sciences) in 2018. The facility was designed and constructed by IMP (Institute of Modern Physics, Chinese Academy of Sciences). The beam commissioning of PREF had been started since August to September of 2023. Four types of instruments, scintillation screen, Faraday cup, scintillator and ionization chamber are implemented for the proton beam profile, intensity, position, efficiency, spill structure. With the beam instruments, the machine reached nearly 95% slow extraction efficiency for all energies from 10 to 60 MeV, 5$\times10^{10}$ particle per second (ppp), 2$\times$2 cm² up to 20$\times$20 cm² scanning area.