Quench Propagation at Different Conditions in an HTS Pancake Coil Wound With Roebel Cable

• Published in: IEEE transactions on applied superconductivity 2021-08, Vol.31 (5), p.1-5
• Main Authors: Cavallucci, L., Breschi, M., Ribani, P. L., Pelegrin, J., Zhang, Q., Bailey, W., Yang, Y.
• Format: Article
• Language: English
• Subjects: Computational modeling; Contacts; Damage prevention; Heating systems; HTS; Magnets; modelling; Numerical models; pancake coil; Pancake coils; quench; REBCO Roebel cable; Superconducting magnets; Temperature measurement; Thermal analysis; Voltage measurement
• ISSN: 1051-8223; 1558-2515
• DOI: 10.1109/TASC.2021.3070481

The analysis of quench is of paramount importance for the safe operation of any superconducting magnet and this investigation is more relevant, even not fundamental, to prevent damage or burn-out in HTS magnets. Given these premises, quench tests and numerical models are indispensable. A 1D electro-thermal model was developed at the University of Bologna (Italy) and validated versus experimental quench tests performed at the University of Southampton (U.K.) on a pancake coil wound with REBCO Roebel cable in the frame of the EUCARD-2 European Project. The analysis here presented investigates quench in the Roebel-based coil in case of a thermal disturbance introduced in the coil. The quench energies measured during tests as a function of the power disturbance are compared with the computed results. The quench energy is furthermore analysed energizing the coil at different transport current. The analysis is further extended to study the quench of the coil at temperatures of 66 K and at field of 2 T.