Service-Oriented Remote Operation System for J-TEXT Tokamak

To fully use the tokamak facility, it is necessary to allow researchers to remotely participate in the tokamak experiments via the Internet. Being able to control the operation of the tokamak is a key point. In this paper, the design and implementation of the remote operation system for the Joint Texas Experimental Tokamak (J-TEXT) are presented. To make this system flexible, the service-oriented design is applied. Instead of just providing software or website that controls devices and instruments on the tokamak, a series of Application Programming Interfaces are exposed as web services. All the operations of the J-TEXT tokamak are wrapped in these services. The representational state transfer design practice has been adopted to ensure that these services are accessible by various clients. A remote operation website based on these services has been developed. However, users can build their own websites or remote control rooms, which consume these services to operate the J-TEXT tokamak. An authorization and authentication system is included to prevent the users from consuming unauthorized services. The proposed remote operation system is compatible with Experimental Physics and Industrial Control System and has been integrated within the J-TEXT control, data access, and communication system.