INFLUENCE OF EDDY CURRENTS IN SUPERCONDUCTING PARTICLE ACCELERATOR MAGNETS USING RUTHERFORD-TYPE CABLES

摘要

A model describing the influence of eddy currents in superconducting particle accelerator magnets using flat, two-layer, Rutherford-type cables is developed. The model relies on a two-dimensional field calculation, and considers two types of eddy currents: 1) the intra-strand eddy currents flowing within the cable strands and coupling the superconducting filaments, and 2) the inter-strand eddy currents flowing from strand to strand through the contact resistances at the crossovers between the two cable layers. The model can be used to compute the power and the field distortions produced by the eddy currents and is applicable to most of the existing designs of superconducting particle accelerator magnets.