Influence of the Transport Current on Hysteresis Losses in Superconducting Wires

Abstract

The hysteresis loss in cylindrical non-ideal type II superconductors is investigated theoretically for the case where an alternating field is applied transverse to the conductor carrying a d.c. transport current. The cross-section of the shielded region in the superconductor is assumed to have an elliptical shape. In order to simulate the winding of superconducting magnets, the magnetic interaction between the turn under consideration and the surrounding turns is taken into account. The total hysteresis loss is analysed as a sum of the magnetization loss and the loss due to the dynamic resistance. The calculated losses for a wide range of the amplitude of the alternating field are given in graphs which clearly show how the transport current and the intraction among turns influence the hysteresis loss.