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EXPERIMENTS USING SUPERCONDUCTING WEAK LINK MAGNETOMETER
SUMMARY AND CONCLUSIONS
aluminum annulus applied field applied magnetic field BCS theory calculated concentric cylinders configuration considered constructed cooled copper curve Deaver Delrin determined dewar diameter electrons equation 28 equilibrium magnetization equilibrium magnetization plot equilibrium magnetization versus Evaporate Tin experiment experimental Figure filament flux unit fluxoid free energy density frequency Gibbs free energy heater helium bath hole illustrated in Fig inch indium Insulate with SiO Josephson junction joule heating layers magnetic field magnetic flux magnetometer measure Meissner Effect microns milligauss momentum mu-metal multiply-connected nevertheless niobium normal and superconducting outer cylinders pair period phase pick-up coil problem quantized flux quantized in units quantum condition quantum mechanical region Rotate tt Insulate seemed shown in Fig simple cylinder simple ring solder solenoid super supercon superconducting double loop superconducting ring supercurrent superelectron thick tin foil transition temperature tube units hc/2e voltage wave function single-valuedness weak link wire