Designing for superconducting magnet stability using minimum propagating zone theory

Minimum propagating zone (MPZ) theory has been applied to the design of several superconducting coils which were, at the time of their conceptualization, novel and unique concepts. Each of the coils, the 300-kJ pulsed discharge coil, the Nb₃Sn forced flow-cooled Large Coil, and an epoxy potted coil, utilized a form of the MPZ theory to relate a different type of cooling and structural support system to the chosen magnet stability criterion. The design philosophy, analysis, and performance of the magnets are reviewed, and correlation of the quench conditions with conductor diameter is clearly indicated. The MPZ concept is shown to be a powerful tool, and it has had a major impact on the design parameters and operating modes of these coils