Losses in Nb/Ti multifilamentary composite when exposed to transverse alternating and rotating fields

Experimental and theoretical studies have been made of losses in Nb/Ti multifilamentary composite exposed to transverse alternating and rotating fields. Analytical expressions for eddy current losses inside the copper matrix can be found. As for hysteresis losses, an analytical expression can only be obtained in low and high field limits. Numerical calculations have been made to determine hysteresis losses and magnetisation in the Nb/Ti filaments for intermediate fields. These calculations are based on an iterative computer solution for the flux and current profiles in the Nb/Ti filaments. Simple polynomials are fitted to these calculations and theoretical results are compared with experimental results obtained using calorimetric techniques.