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Summary: 1
IDENTIFICATION NUMBER: 4ME20
Abstract--Artificial welding of melt-textured YBCO blocks
opens the door to the fabrication of large, complex-shaped pieces
required for applications. In order to evaluate the
superconducting quality of the welds, we have developed a Hall
probe mapping system, able to record the local magnetization at
77 K under dynamic applied fields in the range of 1 to 1 T. The
system was used to characterize welded samples prepared with a
new Ag induced surface melting joining technique. The
magnetization maps of unwelded and welded samples of various
qualities are compared and discussed. The current distributions
associated to the Hall maps were calculated using the Caragol
software. The magnetization and current distribution maps over
the joint show that good quality welds can be reached with this
joining method.
Index Terms--Welding YBCO; Hall probe; magnetization;
critical current.
I. INTRODUCTION
HE application of melt-textured YBa2Cu3O7 in
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