Modelling of dual stability in a cable-in-conduit conductor (for NET)

A zero-dimensional stability model has been developed for cable-in-conduit superconductors. The model is effective in simulating the multivalued stability behavior in the vicinity of the limiting current. This has been achieved by modifying the helium heat transfer coefficient to account for inertial and frictional terms which affect the induced helium flow. The model can reproduce with remarkable accuracy the multivalued stability behavior shown in earlier measurements performed by J.W. Lue et al. (1980). A first-order approximation of the effect of the steady-state mass flow is introduced in the model, showing how an increase of the steady-state mass flow rate tends to wash away the multiple stability region as observed in the experiment.