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

Huang, Zhongmin; Li, B.; Zheng, Guoyao; Yuan, Q.P.; Ji, X.Q.; Xiao, Bingjia; Zhou, Jian‐Liang; Huang, Jia; Zhang, R.R.; Lu, Tianbo; Humphreys, D.A.

doi:10.1016/j.fusengdes.2023.113763

Cited by 3 publications

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The original HL-2M plasma control system (PCS), inherited from the HL-2A PCS [3], was initially operated using a limiter configuration for first plasma [4], without an additional vertical stability control system. However, to accommodate the advanced divertor configurations and high confinement mode planned for HL-2M, a new PCS framework [5] has been developed based on the DIII-D PCS [6]. This upgraded PCS necessitates the design and implementation of a new VS control system to effectively handle the vertical instability control requirements of HL-2M's high-performance operational scenarios.…”

mentioning

confidence: 99%

Implementation and preliminary results of the first vertical stabilization control system for HL-2M

Liu,

Li,

Zheng

et al. 2024

Preprint

View full text Add to dashboard Cite

Achieving advanced divertor configurations and high-confinement operating regimes is crucial for mitigating divertor heat loads and exploring enhanced confinement physics in the HL-2M tokamak. However, these scenarios with highly elongated plasmas face severe Vertical Displacement Events (VDEs) that can lead to rapid plasma termination and potential device damage. Robust active control of vertical instability is therefore essential. As HL-2M lacks internal control coils, we developed two sets of vertical stabilization (VS) control systems, each employing a pair of external poloidal field (PF) coils, PF main power supplies, and VS power supplies. This paper details the first vertical stabilization (VS1) control system's circuit diagram, hardware architecture, and software implementation, and discusses issues encountered during commissioning and their solutions. By improving the internal hardware of the VS power supply, the voltage rise time was reduced to approximately 30 microseconds, resolving branch current imbalances. The transmission delay of the control signals is approximately 38 µs. Preliminary plasma experiments demonstrated effective vertical displacement control with the VS1 control system, achieving a maximum plasma elongation of 1.73 and typical control accuracy of ~ 20 mm. This work lays the foundation for robust control under high-parameter operational scenarios and the design and implementation of the higher-power VS2 control system.

show abstract

mentioning

confidence: 99%

Implementation and preliminary results of the first vertical stabilization control system for HL-2M

Liu,

Li,

Zheng

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

Magnetic pickup coil systems on the HL-3 tokamak

Wang,

Liang,

Sun

et al. 2023

AIP Advances

View full text Add to dashboard Cite

HL-3 is a new medium-sized copper conducting tokamak, which is dedicated to the plasma shaping control for plasma high performance and flexible operation, especially the advanced divertor configurations. According to the physics needs of the project, three types of magnetic pickup coils are designed and developed on HL-3 for magnetic field measurements. The coils emphasize different geometry sizes and array layouts. The coils are installed carefully by using high-precision positioning equipment to ensure the measurement accuracy of the system. After calibration, the magnetic field measurements are supplied for real-time equilibrium reconstruction and plasma control, e.g., with snowflake-shaped divertor configuration reconstruction. Mirnov coils satisfy the requirements for physical analysis, including determining the mode number from raw signals and detecting the magnetohydrodynamic instabilities.

show abstract

Heterogeneous Online Computational Platform for GEM-Based Plasma Impurity Monitoring Systems

Linczuk,

Wojeński,

Czarski

et al. 2024

Energies

View full text Add to dashboard Cite

The fusion energy research field presents many intricate challenges that require resolution. Many diagnostic systems employed in experiments are approaching the limits of current technology. Implementing efficient measurements requires using an appropriate set of tools to facilitate the optimal utilization of hardware. Fusion energy measurements must provide low latency processing with the capacity for future improvements and the ability to handle complex data flows efficiently. The presented work addresses these requirements and describes the implementation of a high-performance, low-latency software platform with convenient development for soft X-ray (SXR) plasma impurities emission tracing—the Asynchronous Complex Computation Platform (AC2P). This article presents the architectural design, implementation details, and performance and latency measurements based on the raw data acquired from the WEST tokamak and laboratory tests. AC2P provides the tools to develop low-latency, multi-core, multi-device complex data flow graph scale-up solutions for measuring impurities in hot plasmas. The system has been designed to operate online during experiments, calculate the energy distribution, position and occurrence time of SXR photons, monitor the data stream’s quality and archive any abnormalities for subsequent offline verification and algorithm improvement. This article presents AC2P, which operates as part of the SXR measurement system on the WEST tokamak.

show abstract

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

Cited by 3 publications

References 13 publications

Implementation and preliminary results of the first vertical stabilization control system for HL-2M

Implementation and preliminary results of the first vertical stabilization control system for HL-2M

Magnetic pickup coil systems on the HL-3 tokamak

Heterogeneous Online Computational Platform for GEM-Based Plasma Impurity Monitoring Systems

Contact Info

Product

Resources

About