Slow control system of the HIRFL-CSR external-target experiment

The Cooling Storage Ring (CSR) External-target Experiment (CEE) at the Heavy Ion Research Facility in Lanzhou (HIRFL) began its construction in 2020. It will be the first large-scale experiment in China's Giga electron-volt (GeV) energy range. As one of its 12 subsystems, the Slow Control System (SCS) has been designed and implemented using the framework of the Experimental Physics and Industrial Control System (EPICS). The monitoring, control, alarming and archiving of all slow control devices and the front-end electronics (FEE) in the 12 subsystems are developed on this open-source platform. Uniform multiuser interfaces were developed using CSS and web browser. A local database based on MySQL was created to store all the process variables (PVs) of the SCS. This paper describes the SCS tasks, architecture design and implementation, as well as some valuable monitoring and maintenance applications.