Seminar of International Laboratory of High Magnetic Fields and Low Temperatures PAS
ul. Gajowicka 95, sala seminaryjna (nowy budynek, II piętro)
Stacks of Superconducting (RE)BCO Tape Layers as Field Poles for Motor/Generator Applications
Algirdas Baskys
Department of Materials Science and Metallurgy, University of Cambridge, United Kingdom
Stacks of 2nd generation superconducting tape layers can be used as magnetic field sources in the same way as (RE)BCO bulks by circulating a persistent current within the sample. Previous work by Patel et al. has shown that fields up to 7 T can be trapped [1] via field cooling samples as small as 12 mm square and 13.8 mm high. Advantages over (RE)BCO bulks include high mechanical strength, excellent uniformity of critical current density and higher thermal conductivity, which is important during pulse magnetisation. As the stack is made up of individual layers it can be assembled in a variety of aspect ratios and other functional materials can be incorporated. The latest progress in a comprehensive study being undertaken to optimize and tailor the stacks for applications will be summarised, in particular, method of binding the layers and scaling up to higher aspect ratios to increase trapped flux for motor/generator applications.
[1] A. Patel, K. Filar, V. I. Nizhankovski, S. C. Hopkins, and B. A. Glowacki, “Trapped fields greater than 7 T in a 12 mm square stack of commercial high-temperature superconducting tape,” Appl. Phys. Lett., vol. 102, no. 10, Art. No. 102601, 2013.
