Analysis of threshold curves for superconducting interferometers

Journal Article · Sat Dec 01 04:00:00 EST 1979 · J. Appl. Phys.; (United States)

DOI:https://doi.org/10.1063/1.325954· OSTI ID:5677781

Peterson, R L; Hamilton, C A

Threshold curves for multijunction superconducting interferometers have been calculated previously, showing general agreement with observed features, especially in symmetric cases. We here add some more details to the analysis, paying particular attention to the effects of asymmetries in coupling, inductance, or critical currents. Feed-loop inductance and flux quantization in the feed loop can be important. A changing lobe pattern over many periods, asymmetries within a period, shifting patterns between runs spanning a warm-up, and sudden changes in pattern because of noise in the environment are all quantitatively explainable on the basis of this model. By use of a single ''calibration curve'', the inductance for symmetric two- or three-junction interferometers can be obtained immediately.

• Research Organization: Electromagnetic Technology Division, National Bureau of Standards, Boulder, Colorado 80303
• OSTI ID: 5677781
• Journal Information: J. Appl. Phys.; (United States), Journal Name: J. Appl. Phys.; (United States) Vol. 50:12; ISSN JAPIA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ASYMMETRY
CALIBRATION
CRITICAL CURRENT
CURRENTS
DATA ACQUISITION
ELECTRIC CURRENTS
FLUX QUANTIZATION
INTERFEROMETERS
JUNCTIONS
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
NOISE
SUPERCONDUCTING DEVICES
SYMMETRY