75778 20220223111654.0 doi 10.1088/1361-6668/aab0c1 sideral 105465 ART-2018-105465 eng Cubero, A. Universidad de Zaragoza (orcid)0000-0002-3309-5961 Quench dynamics in MgB2 Rutherford cables 2018 Access copy available to the general public Unrestricted The generation and propagation of quench induced by a local heat disturbance or by overcurrents in MgB2 Rutherford cables have been studied experimentally. The analysed cable is composed of 12 strands of monocore MgB2/Nb/Cu10Ni wire and has a transposition length of about 27 mm. Measurements of intra- and inter-strand voltages have been performed to analyse the superconducting-to-normal transition behaviour of these cables during quench. In case of external hot-spots, two different time-dynamic regimes have been observed, a slow stage for the formation of the minimum propagation zone (MPZ), and a fast dynamics once the quench is triggered and propagates to the rest of the cable. Significant local variations of the quench propagation velocity across the strands around the MPZ have been observed, but with average quench propagation velocities closely correlated with the predictions given by one-dimensional-geometry models. For quench induced by overcurrents (i.e. with applied currents higher than the critical current) the nucleation of many normal zones distributed within the cable, which overlap during quench propagation, gives a distinctive and faster quench dynamics. info:eu-repo/grantAgreement/ES/MINECO/ENE2014-52105-R info:eu-repo/semantics/openAccess by-nc-nd http://creativecommons.org/licenses/by-nc-nd/3.0/es/ 2.489 2018 PHYSICS, CONDENSED MATTER 31 / 68 = 0.456 2018 Q2 T2 PHYSICS, APPLIED 56 / 148 = 0.378 2018 Q2 T2 0.879 2018 Ceramics and Composites 2018 Q1 Condensed Matter Physics 2018 Q1 Metals and Alloys 2018 Q1 Materials Chemistry 2018 Q1 Electrical and Electronic Engineering 2018 Q1 info:eu-repo/semantics/article info:eu-repo/semantics/acceptedVersion Navarro, R. Universidad de Zaragoza (orcid)0000-0002-4140-4058 Kovác, P. Kopera, L. Rindfleisch, M. Martínez, E. Universidad de Zaragoza (orcid)0000-0003-4839-5286 5001 065 Universidad de Zaragoza Dpto. Ciencia Tecnol.Mater.Fl. Área Cienc.Mater. Ingen.Metal. 31, 4 (2018), 045009 [9 pp] Supercond. sci. technol. SUPERCONDUCTOR SCIENCE & TECHNOLOGY 0953-2048 1027332 http://zaguan.unizar.es/record/75778/files/texto_completo.pdf Postprint 69680 http://zaguan.unizar.es/record/75778/files/texto_completo.jpg?subformat=icon icon Postprint oai:zaguan.unizar.es:75778 articulos driver 2022-02-23-11:12:53 ARTICLE