The Study Of Control System Design And Technologies For Tokamak

The tokamak is a sophisticated experimental device. It is composed with many sub-systems. The control system of a tokamak will have to orchestrate all the instruments and devices to conduct a successful experiment, as well as collect and archive the scientific data generated during the experiments. Therefore, study of the tokamak control system design and its implementation technologies are very important.This work has investigated the control system of ITER. Based on that, it has studied the architecture design and implementation technologies of a tokamak control system and developed the J-TEXT COntrol Data Access and Communications (CODAC) system. We also studied some technologies that may be used in develop control system for future tokamaks.Inspired by ITER control system, this work has done in-depth research on control system architecture, software frameworks for integrated control system as well as data acquisition and real-time control technologies. This work has developed a way of abstract the control system architecture. A method of designing the architecture of tokamak control system is developed; de-centralized and self-organizing control system architecture is designed; software framework for developing Experimental Physics and Industrial Control System (EPICS) based control system, called J-TEXT EPICS is developed. It is designed to improve the productivity of building EPICS control system. We also developed a real-time control and data acquisition framework based on PXI/PXIe hardware and LabVIEW-RT software. A high-speed data acquisition and real-time processing system based on Field-Programmable Gate Array (FPGA) is also developed.This work also upgraded the J-TEXT control system using the technologies described above. The new J-TEXT control system is called J-TEXT CODAC System. It adopted the de-centralized and self-organizing architecture. It also adopted the EPICS channel access protocol the same as ITER. J-TEXT EPICS framework was used in building the J-TEXT CODAC System. A brand new FPGA based timing system is developed. CompactRIO based interlocking system and PXI/PXIe hardware based data acquisition system was deployed in the J-TEXT CODAC System. Finally yet importantly, helped by the experiences developing all the control system technologies described above, we conducted some research on some emerging technologies that may be used in next generation tokamak control system:HTTP RESTful based control system framework and network protocols; cloud based storage for tokamak experiment data archiving. In addition, some preliminary prototype systems have been developed.The J-TEXT CODAC system implemented using method and technologies developed in this work are deployed on J-TEXT and works well in daily experiments. Moreover, the studies on emerging technologies will provide valuable experiences for future tokamak control system design.