Critical current density of Bi-2223/Ag multifilamentary tapes from 4.2 K up to 90 K in magnetic fields up to 23 T

The transport critical current density of a 37 filament Bi-2223/Ag tape has been measured as a function of field at temperatures from 4.2 K up to 90 K. Measurements have been made with the tape in three orientations with respect to field. Data have been obtained over a large range of current from 10 mA to 100 A (i.e. four orders of magnitude) and a large range of applied fields up to 23 T. The J/sub c/ values have been fitted to the exponential form J/sub c/=/spl alpha/(T)exp[-B//spl beta/(T)] and compared to data in the literature. The comprehensive measurements presented in this paper can be used to test the predictions from the many mechanisms that have been proposed to explain J/sub c/ in Bi-2223/Ag tapes.