Rf pumped SQUID with large output signal

Journal Article · Thu Jan 10 04:00:00 EST 1991 · Modern Physics Letters B; (United States)

DOI:https://doi.org/10.1142/S0217984991000435· OSTI ID:6092927

Krivoy, G S; Komashko, V A ^[1]

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1. Omsk Polytechnical Inst., Mir Prospect 11, 644050 (SU)

The dc SQUID had been presented for use in the rf SQUID instead of a weak link. The new device, referred to as double SQUID, possesses a large output signal (hundreds of microvolts) in operating in a hysteretic mode. For making an operating mode a double SQUID is coupled to a circuit traditional for rf SQUIDs containing a tank circuit and an rf current pumping generator. The magnetic flux being measured is recognized by the dc height of the flat part of the tank circuit I-V characteristics coupled to a double SQUID is modulated. It is this modulation that is the SQUID output signal. The experimental investigations of the double SQUID showed the validity of the assumptions under consideration. Output signals up to 690 {mu}V, noise spectral density {approx} 2 {times} 10{sup {minus}5} {phi}{sub 0}/Hz{sup 1/2} ({phi}{sub 0} is the flux quantum) and energy resolution {approx} 1.4 {times} 10{sup {minus}29}/Hz have been obtained.

• OSTI ID: 6092927
• Journal Information: Modern Physics Letters B; (United States), Journal Name: Modern Physics Letters B; (United States) Vol. 5:1; ISSN 0217-9849; ISSN MPLBE
• Country of Publication: United States
• Language: English

Related Subjects

665411 -- Basic Superconductivity Studies-- (1992-)
665412* -- Superconducting Devices-- (1992-)
75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRITICAL CURRENT
CURRENTS
ELECTRIC CONDUCTIVITY
ELECTRIC CURRENTS
ELECTRICAL PROPERTIES
ELECTRONIC EQUIPMENT
EQUIPMENT
FLUX QUANTIZATION
FLUXMETERS
MAGNETIC FLUX
MEASURING INSTRUMENTS
MICROWAVE EQUIPMENT
MODE SELECTION
PHYSICAL PROPERTIES
RF SYSTEMS
SQUID DEVICES
SUPERCONDUCTING DEVICES
SUPERCONDUCTIVITY