Dynamic Quench Protection of Large-Scale Fusion Devices Based on Superconducting Magnet Testing

Objective The large-scale superconductor test facility (LSTF) is an important component of load testing for superconducting magnets in fusion research. It can provide various types of testing for superconducting magnets. During the testing process, the quench protection system (QPS) is crucial in preventing superconducting magnet coils from being overheated and damaged due to quench.

Method Firstly, a large scale superconducting testing platform the article was introduced and the process of superconducting magnet quenching during system operation was analyzed, which could elaborate the current situation of each circuit in the QPS. Then, by analyzing the operating principles of each unit in the system, the adjustment of operating units in the system for different superconducting magnet parameters, especially the reverse pulse capacitor unit and the fast discharge resistor were elaborated in detail. Finally, a parameter of the superconducting magnet coil was selected to illustrate the dynamic protection framework of QPS proposed in this article.

Result The article proposes an effective, safe, and compatible dynamic quench protection framework to meet the protection requirements of superconducting magnet under different parameters, including transfer time, protection voltage, temperature rise rate, and current decay rate.

Conclusion Through research, it can be found that the dynamic quench protection framework proposed in this paper can provide a rapid and effective protection for the large-scale development of superconducting magnets.