Fabrication and transport properties of Bi-2212/Ag prototype magnets for 1 GHz-NMR magnet system

Over 2 km-long ROSAT wires with round-shaped cross-section have been successfully fabricated to a prototype magnet having the same dimensions as the actual insert magnet of a 1 GHz-NMR spectrometer. 400 m-long ROSAT wires with rectangular shaped cross-section have also been manufactured without any degradation of the current carrying capacity through wire processing. Another prototype magnet has been fabricated with the rectangular ROSAT wire. For each magnet, the present study demonstrates the feasibility of processing both 1 m-long Bi-2212/Ag leads and ROSAT wire-NbTi wire joints at each end of the leads to the magnet construction. (C) 2001 Elsevier Science B.V. All rights reserved.