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Abstract: The vacuum system provides the necessary vacuum conditions for the generation, transport, and target impact of particle beams in high-current linear induction accelerators (LIAs). To achieve monitoring and control of nearly a hundred molecular pumps, several cryopumps, and numerous vacuum valves in two high-current LIAs, this paper designs a vacuum control system based on a front-end field controller and a cloud-based EPICS architecture. The front-end field controller enables one-click start/stop of the vacuum systems for the two high-current LIAs and vacuum protection under abnormal conditions through user-defined logic, and connects to the accelerator control network via the TCP/IP protocol. Multiple application-layer services based on the EPICS architecture are developed on virtual hosts of the accelerator cloud platform. Field data is transmitted in real time using the S7Nodave protocol, enabling remote monitoring of the vacuum system status of the two high-current LIAs, as well as application services such as cathode heating and abnormal protection. After testing and online operation, the vacuum control system demonstrates complete functionality and stable operation, ensuring the stable output of the accelerator.
Key words：High-current linear induction accelerator, vacuum system, EPICS, control system
