High-performance UHF SQUID magnetometer

Journal Article · Thu Nov 01 04:00:00 EST 1979 · Rev. Sci. Instrum.; (United States)

DOI:https://doi.org/10.1063/1.1135717· OSTI ID:5878392

Long, A; Clark, T D; Prance, R J; Richards, M G

We describe a lumped-component stabilized point contact SQUID magnetometer, biased at 430 MHz and utilizing a cooled (4.2 K) GaAs FET preamplifier. The system incorporates a full-bandwidth (5--10 MHz) flux-locked loop and has an overall flux sensitivity of 1 x 10/sup -5/ PHI/sub 0//(Hz)/sup 1/2/, corresponding to an energy sensitivity approx. = 4.5 x 10/sup -31/ J/Hz.

• Research Organization: School of Mathematical and Physical Sciences, University of Sussex, Brighton, BN1 9QH, United Kingdom
• OSTI ID: 5878392
• Journal Information: Rev. Sci. Instrum.; (United States), Journal Name: Rev. Sci. Instrum.; (United States) Vol. 50:11; ISSN RSINA
• Country of Publication: United States
• Language: English

Related Subjects

420201* -- Engineering-- Cryogenic Equipment & Devices
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
AMPLIFIERS
ARSENIC COMPOUNDS
ARSENIDES
ELECTRONIC EQUIPMENT
ENERGY RESOLUTION
FIELD EFFECT TRANSISTORS
FLUXMETERS
FREQUENCY RANGE
GALLIUM ARSENIDES
GALLIUM COMPOUNDS
MAGNETIC FLUX
MAGNETOMETERS
MEASURING INSTRUMENTS
MHZ RANGE
MHZ RANGE 100-1000
MICROWAVE EQUIPMENT
PNICTIDES
RESOLUTION
SEMICONDUCTOR DEVICES
SENSITIVITY
SQUID DEVICES
STABILIZED SUPERCONDUCTORS
SUPERCONDUCTING DEVICES
SUPERCONDUCTORS
TRANSISTORS
ULTRALOW TEMPERATURE