Coupling losses of multifilamentary superconductors having several concentric regions and mixed matrix

A method is presented to calculate the coupling loss in multifilamentary conductors containing a mixed matrix. The conductor geometry considered has several concentric regions with either isotropic normal material, anisotropic normal material, or superconducting filaments. In anisotropic normal regions, containing for example Cu hexagons in a CuNi environment, the effects of anisotropy and twist have to be taken into account. An interesting similarity is observed between such regions with highly anisotropic normal material and regions with superconducting filaments.<>