For offshore superconducting wind generators, the complex operating conditions inside the machine—including thermal losses, stress, vibration, and transient load variations—pose significant challenges to the stable operation of the magnet. These factors can trigger coil quenching, potentially leading to the burnout of excitation coils and further generator fault condition. This study is a...
SupraFusion is a French research program aiming to boost HTS (High-Temperature Superconductors) technologies towards large-scale societal applications and particularly compact fusion machines. In the framework of this program, a large-scale HTS magnet demonstrator is presently under design. This large-scale magnet aims to demonstrate our capability to reach safely a peak field of about 20 T...
The SSRF (Shanghai Synchrotron Radiation Facility) superconducting wiggler consists of three parts: a superconducting multipole magnet, a cryostat system and magnet power & control system. Superconducting multipole magnets can generate a strong magnetic field with a peak of 4.2T, and the generated magnetic field alternates positively and negatively along the direction of electron motion in the...
No-insulation (NI) rare-earth barium copper oxide (REBCO) magnets have demonstrated the potential to achieve high magnetic fields in compact spaces. Several REBCO magnets, whether combined with resistive outserts or operating standalone, have successfully reached fields over 20 T. However, many quench events have been reported during operation without clearly identified causes, leading to...
High temperature superconducting (HTS) magnet is only option for applications of high magnetic field above 20 T due to high upper critical magnetic field at low temperature. However, the quench detection is challenge for HTS magnet since its low quench propagation velocity coming from low thermal conductivity and wide operation range of temperature. In this paper, we propose a novel quench...
Tokamak controlled nuclear fusion emerges as a promising solution to the current global energy predicament. The solenoid coil, a pivotal component, plays a crucial role in confining plasma within the Tokamak device. Bi-2223/Ag high temperature superconducting tapes, with a high critical temperature and excellent machinability, are favored material for fabricating solenoid coils. Nevertheless,...
The Bi-2223/Ag high-temperature superconductor (HTS) tape has become one of the best candidate materials for high-performance superconducting magnets due to its high current-carrying capacity and excellent multi-filament stability. To achieve the capability of transporting thousands of amperes or even higher current levels, it is common to assemble multiple sub-cables constructed from...
This paper presents an approach to calculate the thermal quench temperature of non-insulation(NI) REBCO coils and predict the thermal quench upper limit of large - scale engineering coils. This method serves as a guiding principle for the design of coil and magnet structures. Given a specific quench margin, it safeguards the coil from damage and ensures excellent thermal stability.
Quench...
