Transport Properties of Bi-2212/Ag Superconducting Magnet with Ic over 500 A
1995
A compact 3 T-class superconducting magnet has successfully been fabricated using 6 stacks of single pancake coils prepared from Bi-2212/Ag multifilamentary composite tapes. The dimensions of the magnet were 45 mm in height, 45 mm in outer diameter and 13 mm in clear bore. Maximum coil current reached 550 A (10-13 Ω m), generating a magnetic field at the center B0=3.1 T and maximum field of the magnet B m=3.3 T without backup magnetic field. The J c of the coil was estimated to be approximately 55% of the short-sample results. A single pancake coil generated B m=0.42 T in a backup field of 20 T, although degradation of J c due to large electromagnetic force was observed.
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