Experimental Aspects of Superconductivity: Editors’ Note
Several of the sessions of the course were devoted to discussions and demonstrations of laboratory techniques and the experimental aspects of superconductivity. During the day set aside for laboratory visits, Rolfe E. Glover III and his group at the University of Maryland demonstrated thin film techniques; Robert A. Hein, John E. Cox, Donald U. Gubser and Russel A. Meussner of the Naval Research Laboratory discussed preparation of alloys and demonstrated high critical field measurements using both adiabatic de-magnetization and dilution refrigerator cooling; and the Low temperature group at the National Bureau of Standards (James F. Schooley, Robert J. Soulen, Jr., and Jack H. Colwell) demonstrated heat capacity and d.c. magnetization measurements, and Josephson effect thermometry. In addition, during a lecture demonstration at Georgetown, Sidney Shapiro demonstrated an analog computer device built by Clark Hamilton that “solves” the Josephson equations in graphical form, for a variety of experimental conditions. During other laboratory demonstrations at Georgetown, a.c. susceptibility, d.c. magnetization, Giaever tunneling and Josephson effect detectors and radiators were demonstrated by William D. Gregory. Also, some actual experiments were shown using video tape recordings.