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Abstract
This paper reports the fabrication and properties of aQMG® coil magnet as a high field application of an oxide bulk highTc superconductor. QMG® is a high Jc bulk material, which consists of single crystalline 123 with finely dispersed 211. AQMG® coil with seven turns is made from a slice of Ag doped Gd–Ba–Cu–OQMG® by using precise machining techniques. The magnet is made from six layers of theQMG® coil with magnetic fields of 0.56 T at 340 A at 77 K and 1.18 T at 700 A at 63 K. In the presentstudy, the magnetic fields reported in experiments are numerically analysed with anaxisymmetric model, where the superconductive characteristic is evaluated using a criticalstate model. The numerical results for the magnetic field agree well with the experimentalresults.
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