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Cylindrically shaped shieldings were made with NbTi multifilamentary composite wires wound on a bakelite bobbin and impregnated with Wood's metal. It was confirmed that Wood's metal and an upper critical field of about 1 T allow a superconducting junction between the wires. Static fields up to 1 T were applied to the shieldings and the field penetration was examined. A field of 0.5 T could be reduced to less than 10/sup -3/ T for about 30 min. The magnetic stability against a pulsed field was also examined and high performance confirmed.>
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Okada et al. (1988) studied this question.
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