Recollections of Superconductivity Work at LBL and KfK From 1965 Through the 1980s

This paper is about the first 25 years of the author's career. The author started working with superconducting (S/C) magnets in 1965. He has been in the field for more than 50 years. He worked on S/C magnet refrigeration and with S/C magnets from 1966 to 1971. He made the first measurement of higher multipoles generated by the circulating currents within the superconductor filaments in the first Berkeley S/C dipole magnet built in 1969. He also performed cooling experiments with super critical and two-phase helium on a small S/C magnet using a refrigerator. In the spring of 1971, the author joined the staff of the Institute for Experimental Kernphysik in Karlsruhe, Germany. He was also part of the Group European for Superconducting Super Synchrotron (GESSS) collaboration between Centre European Research Nuclear(CERN), Kernforschungzentrum Karlsruhe, Saclay, France, and the RAL, U.K. The German S/C dipole is described and his work on S/C synchrotrons is discussed. In the 1970s, he did a lot of work on quench protection of high current density S/C magnets. This paper has led to a number of insights that are shared here.