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The China Spallation Neutron Source is an accelerator-based user facility for neutron, proton, muon applications and so on. The designed proton beam power is 100 kW for the first phase. Overall, the scope of accelerator control system covers four parts, the global systems, the device layer local controls and remote controls, the high-level applications and services and the integration of conventional facilities. The principle guideline is to adopt as many as possible matured technologies and commercial products in the design and implementation. The control system is based on Experimental Physics and Industrial Control System. VME64x bus is chosen for timing system and fast protection system. PLCs and embedded industrial computers are used in the device layer slow controls. Control System Studio is adopted as the high-level applications. Blade server-based virtualization platform is deployed for the computer system. The accelerator control system was completed in September 2017 and then transited to routine operations. The design, implementation and operation of the accelerator control system are described in this paper.

The China Spallation Neutron Source (CSNS) accelerator consists of an 80-MeV H-linac, a 1.6-GeV rapid cycling synchrotron (RCS) and two beam transport lines. The designed proton beam power is 100 kW in Phase-I. The CSNS accelerator can operate in different beam modes and beam destinations, and for each beam destination, the beam power must be strictly restricted; meanwhile, the linac and the RCS may operate independently during the commissioning stage. To satisfy these operation requirements, the run management system (RMS) was designed and deployed for CSNS. The run management system, including a hardware layer and a software layer, operates on the top level of the global control system. RMS coordinates the machine protection system, personnel protection system, timing system and other systems, to set and publish the machine states and machine modes, to verify beam parameters and to permit the beam extraction from ion source. The RMS has been operating for more than one and half years and has played an important role during the commissioning and operation of CSNS facility. This paper will introduce the design and implementation of the RMS for CSNS.