EFFECT OF TWISTING ON THE FILAMENTS OF MULTIFILAMENTARY BSCCO(2223) AG AND /AGMG TAPES/

For reduced AC losses of multifilamentary BSCCO(2223) tapes, it is nec esary to apply a twist to the filaments along the tape direction reduc ing the filament coupling losses, Twists with different twist pitches (10-80 mm) were realized in either Ag sheathed and mechanically reinfo rced AgMg sheathed 37 filament tapes, Possible reasons for the observe d degradations of the transport critical current densities of 22 000 A cm(-2) (Ag sheath) and 19 000 Acm(-2) (AgMg sheath) down to 50% in the worst case (10 mm twist pitch) for twisted tapes, were investigated a nalyzing the influence of twisting on the conductor geometry and defor mation via quantitative image processing of micrographs, The critical current I-C of differently twisted tapes was measured in a magnetic fi eld for various tape orientations. From the J(C)(B) anisotropy the mis alignement angle of the Bi(2223) phase texture was analyzed, and a com parison with rocking angles from X-ray experiments was performed.