Quench temperature excursion predictions for the SSC higher energy booster dipole and quadrupole magnets (HDM and HQM)

摘要

A coupled numerical procedure and MIITS calculation are used to estimate temperature excursions in the HDM and HQM. The MIITS tabulation for copper and niobium-titanium used in this work were given by M.S. McAshan (1988). The increasing size of the normal zone is based on measured propagation velocities. The temperature is calculated from the MIITS integrals. Current decay in the magnet is dependent upon the temperature and time varying resistance of the normal zone. Quench heater performance is included by varying the time delay between quench heater firing and the resulting transition to the normal state. The quench heater delay is also calculated with a numerical model incorporating heater, insulation, conductor, and coolant elements, temperature dependent physical properties, and superconducting properties. Quench projections for magnets in a half cell are made.