STUDY OF ELECTRODYNAMIC AND THERMODYNAMIC MECHANISMS INFLUENCING STABILITY OF SUPERCONDUCTING RUTHERFORD CABLE

Stability for superconducting fast-cycling dipoles and quadrupoles plays an important role. A feature of a complex network of strands and strand-to-strand contacts, current distribution in the network has to be taken into account for superconducting cables. The coupled numerical simulation of electromagnetic and thermal processes in Rutherford superconducting cables during the initiation of a quench was carried out. The network model has been combined with thermal analysis, which allows one to model quench dynamics, including the effects of a current redistribution in strands, discontinuities and inhomogeneity, the initial heating in strand, and as a result occasional quench recovery or runaway quench propagations. Results for the minimum quench energy for cables with core are presented and dependence the minimum quench energy from various parameters of cable is discussed.