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

Over 2 km-long ROSAT wires with round-shaped cross-section have been succes sfully fabricated to a prototype magnet having the same dimensions as the a ctual insert magnet of a 1 GHz-NMR spectrometer. 400 m-long ROSAT wires wit h rectangular shaped cross-section have also been manufactured without any degradation of the current carrying capacity through wire processing. Anoth er prototype magnet has been fabricated with the rectangular ROSAT wire. Fo r 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. Al l rights reserved.