Analysis on stability margin of Nb₃Sn cable-in-conduit-conductor

The stability margin of Nb₃Sn Cable-in-Conduit Conductor(CICC) has been analyzed by a numerical model. The numerical code is based on the finite volume method to discretize the one-dimensional conservation equations on the staggered mesh. The algebraic method is used to transform the non-uniform mesh in the physical plane to the uniform mesh in the computational plane. The numerical simulation shows that the faster supercritical helium mass flow rate can improve the stability and increase the limiting current. The stability and limiting current are decreased with the increasing the operating temperature and background field. The shorter disturbance duration time allows the higher stability in the well-cooled region and the lower stability in the ill-cooled region.