A new scheme of plasma control system based on real-time Linux cluster for HL-2M

• Published in: Fusion engineering and design Vol. 192; p. 113763
• Main Authors: Huang, Z.M., Li, B., Zheng, G.Y., Yuan, Q.P., Ji, X.Q., Xiao, B.J., Zhou, J., Huang, J.J., Zhang, R.R., Lu, T.C., Humphreys, D.
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 01.07.2023
• Subjects: HL-2M tokamak; Linux cluster; Plasma Control System; Real-time control; HL-2M tokamak; Real-time control; Linux cluster; Plasma Control System
• DOI: 10.1016/j.fusengdes.2023.113763
• ISSN: 0920-3796

HL-2M is a medium-sized tokamak constructed by the Southwestern Institute of Physics (SWIP) in China. A new plasma control system (PCS) based on the software framework of DIII-D PCS for HL-2M has been proposed to replace the original loose system. The new hardware system proposed in this paper consists of three computer nodes and peripheral equipment. Data acquisition is completed by a standing server and a reflective memory network that passes back data. The software architecture of DIII-D PCS is generally retained, but some interfaces are added to adapt to the existing system. In addition, the Linux operating system has also been upgraded and optimized so that real-time tasks can achieve better performance. The initial system involves some basic control algorithms satisfying early experiments. The new PCS has been preliminarily verified through simulation and can output control commands as expected in the integrated environment. This paper focuses on two aspects of DIII-D PCS on a new device, i.e., performance and interface adaptation. More efforts will be made to add more algorithms and use the system in real experiments. •Design and implement a new PCS based on the framework of DIII-D PCS for SWIP’s tokamak device HL-2M.•A remote DAQ using D-TACQ2106 is adopted to expand the acquisition capability of the system.•Optimizing the Linux OS for real-time tasks reduces the system jitter to a low level.•The control function of early experimental requirement is realized and do the simulation test.