Enhanced quench propagation in 2G-HTS coils co-wound with stainless steel or anodised aluminium tapes

Núñez-Chico, A. B. ; Martínez, E. (Universidad de Zaragoza) ; Angurel, L. A. (Universidad de Zaragoza) ; Navarro, R. (Universidad de Zaragoza)

Resumen: Early quench detection and thermal stability of superconducting coils are of great relevance for practical applications. Magnets made with second generation high temperature superconducting (2G-HTS) tapes present low quench propagation velocities and therefore slow voltage development and high local temperature rises, which may cause irreversible damage. Since quench propagation depends on the anisotropy of the thermal conductivity, this may be used to achieve an improvement of the thermal stability and robustness of 2G-HTS coils. On pancake type coils, the thermal conductivity along the tapes (coil''s azimuthal direction) is mostly fixed by the 2G-HTS tape characteristics, so that the reduction of anisotropy relies on the improvement of the radial thermal conductivity, which depends on the used materials between superconducting tapes, as well as on the winding and impregnation processes. In this contribution, we have explored two possibilities for such anisotropy reduction: by using anodised aluminium or stainless steel tapes co-wound with the 2G-HTS tapes. For all the analysed coils, critical current distribution, minimum quench energy values and both tangential and radial quench propagation velocities at different temperatures and currents are reported and compared with the results of similar coils co-wound with polyimide (Kapton®) tapes.

Idioma: Inglés

DOI: 10.1088/0953-2048/29/8/085012

Año: 2016

Publicado en: Superconductor Science and Technology 29, 8 (2016), 085012 [9 pp.]
ISSN: 0953-2048

Factor impacto JCR: 2.878 (2016)

Categ. JCR: PHYSICS, CONDENSED MATTER rank: 21 / 67 = 0.313 (2016) - Q2 - T1
Categ. JCR: PHYSICS, APPLIED rank: 38 / 147 = 0.259 (2016) - Q2 - T1

Factor impacto SCIMAGO: 0.966 - Ceramics and Composites (Q1) - Condensed Matter Physics (Q1) - Metals and Alloys (Q1) - Materials Chemistry (Q1) - Electrical and Electronic Engineering (Q1)

Financiación: info:eu-repo/grantAgreement/ES/DGA/T12
Financiación: info:eu-repo/grantAgreement/ES/MINECO/ENE2014-52105-R
Financiación: info:eu-repo/grantAgreement/ES/MINECO/MAT2011-22719

Tipo y forma: Article (PostPrint)

Área (Departamento): Área Cienc.Mater. Ingen.Metal. (Dpto. Ciencia Tecnol.Mater.Fl.)