H. Eckelmann et al., Coupling current losses and time constants in multifilamentary BSCCO(2223)tapes with resistive barriers in external magnetic fields., IEEE APPL S, 11(1), 2001, pp. 2955-2958
Multifilamentary DCMB (dip coated mixed barriers) BSCCO tapes were improved
with respect to thin and continuous barrier layers. Wt used different barr
ier materials like SrCO3, SrZrO3 and a mixture of both materials. Rutherfor
d cable-like design of RBB (ring bundle barrier) tapes were improved by mod
ifying the application of the central resistive core. The coupling current
losses of the different tapes were measured in perpendicular and parallel e
xternal magnetic fields and the coupling current decay time constants were
calculated. For tapes with a barrier of SrZrO3 or a mixed barrier a time co
nstant of 0.6 ms was obtained for a single tape in perpendicular fields and
12 mus for a stack of 4 tapes in parallel external fields, for taper with
a twist length of 10 mm. For the RBB tapes we calculated a coupling current
decay time constant of 0.2 ms in perpendicular fields for a single tape wi
th a twist length of 3.4 mm.