SUPERCONDUCTING QUANTUM INTERFEROMETER.

reportActive / Technical Report | Accession Number: AD0816213 | Need Help?

Abstract:

This report is concerned with the application of superconducting quantum interference devices SQUIDs to measurement of magnetic fields. A brief description of superconducting loop interferometers is presented without invoking the phenomenon of Josephson tunneling. A simplified derivation of the SQUID transfer function is followed by analytical description of superconducting flux concentrators which are proposed for sensitivity enhancement. Noise fluctuations in thin-film bridges, used as weak-link junctions, are postulated and basic relationships are developed between the time correlation function for bridge voltage fluctuations and the space correlation function for vortex number density. Consideration is given to the dynamics of vortex motion and the results are used to derive a practical expression for noise spectral intensity. The use of two SQUIDs to implement a gradiometer is discussed along with frequency response and noise characteristics of a servo-type magnetometer. Author

Author(s):
Mccone, Gordon L.
Author Organization(s):
PHILCO-FORD CORP NEWPORT BEACH CA AERONUTRONIC DIV
Descriptive Note:
Final technical rept. 1 Jul 66-1 May 67,
Pagination:
0070

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
U-4097
Contract/Grant Number(s):
N00014-66-C-0354
 Subject Terms
Modernization Areas:
Quantum Science and Computing
Communities of Interest:
No COI(s) Identified
Descriptor(s):
(*MAGNETOMETERS, MAGNETIC FIELDS), SUPERCONDUCTIVITY, INTERFEROMETERS, NOISE, DENSITY, DYNAMICS, SENSITIVITY, VOLTAGE, DISTORTION
Field(s)/Group(s):
Test Facilities, Equipment and Methods
Report Date:
1967 May 01