[Zurück]

H. Fillunger, M. Foitl, K. Hense, I. Kajgana, A. Kasztler, H. Kirchmayr, R. Lackner, J. Leoni, R. Maix, T. Matthias, J. Fidler:
"Influence of the annealing time of internal tin Nb₃Sn strands on the critical current and the magnetization losses";
Physica C: Superconductivity and its Applications, 372-376 (2002), S. 1758 - 1761.

Influence of the annealing time of internal tin Nb3Sn strands on the critical current and the magnetization losses

H. Fillungera, M. Foitlb, K. Henseb, I. Kajganab, A. Kasztlerb, H. Kirchmayr [Corresponding Author Contact Information] , [E-mail The Corresponding Author] , b, R. Lacknerb, J. Leonib, R. Maixa, T. Matthiasc and J. Fidlerc

a EFDA??Close Support Unit Garching, Boltzmannstrasse 2, D-85748 Garching, Germany
b Institute of Experimental Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, A-1040, Vienna, Austria
c Institute of Applied and Technical Physics, Vienna University of Technology, Wiedner Hauptstrasse 8-10, A-1040, Vienna, Austria

Available online 2 April 2002.
Abstract

Internal tin Nb3Sn strands manufactured by Europa Metalli where subjected to heat treatments at a final annealing temperature of 675 °C at variable time from 1 to several hundred hours. The growth of the Nb3Sn layer and grains is monitored using LVSEM, EDX and TEM. The critical parameters (critical temperature TC, upper critical field HC2 and the scaling parameter C ) as well as hysteresis and coupling losses and the magneto resistance of these strands have been deduced by experiment. From these results we will show, that the behavior of a given strand can be optimized with respect to the desired conditions of operation.

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