LIMITATIONS TO THE PERFORMANCE OF PIT TL(BI)-1223 TAPES

We have investigated the possibility of improving the weak link proper ties of Tl-1223 tape by melt processing, and also studied the technica l limitations of coil fabrication using multimeter lengths of PIT tape . We conclude that melt processing does offer some potential for grain growth, but that grain alignment is only achieved in some places at t he Ag/1223 interface. Until we can establish more control of the local grain alignment by altering the geometry of the samples, the properti es of coils in high fields remains rather poor.