Development and implementation of EPICS application program of HL-2A host engineering parameters acquisition system

In order to meet the increasing experimental requirements of HL-2A tokamak device discharge and improve the integration of HL-2A host centralized control system, this paper designs a high-speed data acquisition system based on PXI Express. In order to enable the fast acquisition system to be integrated into the HL-2A host centralized control system under the EPICS platform for centralized control and management, it mainly describes how to realize the communication between fast acquisition signal system based on C# and the upper layer OPI through the PON network under the EPICS platform. The data acquisition system hardware adopts PXIe-based chassis, embedded controller and high-speed synchronous acquisition card, which has the advantages of good mechanical encapsulation, high modularity and high sampling rate. The software adopts a measurement and control system development platform based on Microsoft. NET platform, Visual Studio development environment and Visual C# language. In this paper, the Epics C# library was studied, the EPICS Server application was developed and the remote control of the state and parameters in HL-2A host engineering system was realized. The system runs stably in the HL-2A device 2018 experiment. The result shows that the system can work stably at 10KSps sampling rate, which can better meet the needs of the device operation. This work completed the basic framework of the HL-2A Tokamak host centralized control system. And the technology and method can provide reference for the design of the next-generation device HL-2 M host centralized control system of the, laying a good foundation.