Superconductivity News Forum (SNF)
Full Text, PDFComparison Between Modelling and Experimental Results of Magnetic Flux Trapped in YBCO Bulks
Frederic Trillaud1, Kévin Berger2, Bruno Douine2 and Jean Lévêque2
1The Institute of Engineering, National Autonomous University of Mexico, Mexico
2The University of Lorraine, GREEN, Research Group in Electrical Engineering and Electronics of Nancy - EA 4366, Vandoeuvre-l`es-Nancy Cedex, France
E-mail: [email protected]
Abstract — An electromagnetic simulation of YBCO bulks was performed and the resulting trapped magnetic flux density was compared to Field Cooling experimental measurements. Due to the underlying symmetry of the experiment and considering an appropriate set of assumptions, an axisymmetric problem relying on an A-formulation of the Maxwell’s equations was solved by means of the Finite Element Method. Thus, time evolutions of measured magnetic flux densities were computed over the bulk. To express its electrical conductivity, a classic power law was adopted that included the dependence of the critical current density upon temperature and external magnetic field. This dependence was modelled on the basis of a Modified Kim-Anderson relation.
Keywords (Index Terms) — Critical state models, trapped magnetic flux, YBCO bulk modelling.
IEEE/CSC & ESAS SUPERCONDUCTIVITY NEWS FORUM (global edition), January 2016.
Submitted September 22, 2015; Selected September 26, 2015. Reference No. ST491; Category 6.
EUCAS 2015 preprint 2A-LS-P-03.04. Submitted to IEEE Trans. Appl. Supercond. for possible publication.
Submitted September 22, 2015; Selected September 26, 2015. Reference No. ST491; Category 6.
EUCAS 2015 preprint 2A-LS-P-03.04. Submitted to IEEE Trans. Appl. Supercond. for possible publication.