Improving and Optimizing the Control System for Reactivating the C-ADS Injector I Facility

China Spallation Neutron Source II (CSNS-II) plans to upgrade its linear accelerator to increase the beam energy from 80 to 300 MeV. The upgrade will utilize 324 MHz double-spoke superconducting cavities and 648 MHz elliptical superconducting cavities. In order to minimize and shorten the future commissioning duration of the superconducting cavities with beam functionality, the management department of CSNS-II has decided to conduct validation of superconducting cavity beam tuning software and methods at the Chinese Accelerator Driven Sub-critical System (C-ADS) Injector I facility. As an experimental device, the C-ADS Injector I facility has been shut down for almost six years. To restore the operation of this machine, it is essential to effectively improve and upgrade the original control system of C-ADS Injector I facility. To ensure high availability and reliability for the reactivation of the C-ADS Injector I facility, both the hardware and software of the original control system have been improved and enhanced. For example, the global timing was upgraded from continuous mode to pulsed mode, providing the operational sequence for the ECR (electron cyclotron resonance), chopper, RFQ (radio frequency quadrupole), and beam instruments. The beam interlock system, which includes MPS and FPS, has been redesigned to ensure the safe operation of all equipment, particularly the critical accelerator components. Proxmox VE was selected as the virtualization software to implement the private cloud platform. Throughout the improvements and optimizations to the control system, it is evident that the availability and reliability of the control system have been substantially and effectively enhanced, which is crucial for the successful validation of the beam tuning methods and software for CSNS-II superconducting cavity at the C-ADS injector I facility.