High-T[c] Superconducting Magnetic Field Sensors and Digital Circuitry


UNITED II - 6677

Keywords superconductivity, Josephson junctions, SNS, SQUIDs, digital circuitry, magnetic field detection


Start Date: 01-JUN-92 / Duration: 39 months

[ contact / participants ]


Objectives

UNITED II addresses two main application areas for high-temperature superconductors (HTSC): digital circuitry and magnetic field sensors.

In the digital circuits area, the objective is to develop and optimise fast circuitry based on the processes developed in the UNITED I project (EP 2281). These processes have proved themselves capable of making rudimentary logic gates, required to build sophisticated devices such as analog/digital converters (ADC).

In the magnetic field detection area, the objective is to develop magnetometers and gradiometers working at 77 K that are fully integrated with on-chip pick-up coil. Special attention will be paid to minimising noise levels related to the microstructure properties of the HTSC layers.

Demonstrators are based on superconducting quantum interference devices (SQUIDs) build with superconductor-normal-superconductor (SNS) junctions.

Progress and Results

Prototype devices have been designed and fabricated. Tests have shown sufficient operating capability and functionality to proceed with design and fabrication of the complete circuits.

Simulation and design studies are being carried out in parallel with product development to ensure that optimal figures are achieved in the resulting magnetometers, gradiometers and ADC.


CONTACT POINT

Dr Denis Crete
Thomson-CSF/LCR
F - 91404 Orsay Cedex
tel: + 33/ 1 60 19 78 05
fax: + 33/ 1 60 19 78 29

Participants

THOMSON-CSF SA - F - C
DORNIER GMBH - D - P
UNIVERSITY OF CAMBRIDGE - UK - P
UNIVERSITEIT VAN TWENTE - NL - P
THOMSON-SINTRA ASM - F - A
UNIVERSITE DE PARIS VI & VII - F - A


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UNITED II - 6677, December 1993


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html version of synopsis by Nick Cook