Summary of existing superconducting magnet experience and its relevance to the safety of fusion magnet

A comprehensive summary of experience with over twenty superconducting magnet systems was collected through visits to and discussions about existing facilities including, for example, the bubble chamber magnets at Brookhaven National Laboratory, Argonne National Laboratory and Fermi National Accelerator Laboratory, and the large superconducting spectrometer at Stanford Linear Accelerator Center. Data are summarized relating to parameters of these magnets, magnet protection methods, and operating experiences. The information is organized and presented in the context of its relevance to the safe operation of future, very large superconducting magnet systems for fusion power plants.