Superconductive Digital Magnetometers with Single-Flux-Quantum Electronics
| Autor: | Torsten Reich, P. Febvre |
|---|---|
| Rok vydání: | 2010 |
| Předmět: |
010302 applied physics
Physics Fluxon Magnetometer Dynamic range business.industry Electrical engineering 01 natural sciences Magnetic flux Electronic Optical and Magnetic Materials law.invention Magnetic field SQUID Optics law Condensed Matter::Superconductivity Rapid single flux quantum Magnetic flux quantum 0103 physical sciences Electrical and Electronic Engineering 010306 general physics business |
| Zdroj: | IEICE Transactions on Electronics. :445-452 |
| ISSN: | 1745-1353 0916-8524 |
| DOI: | 10.1587/transele.e93.c.445 |
| Popis: | Superconducting Quantum Interference Devices (SQUIDs) are known to be the most sensitive magnetometers, used in a wide range of applications like biomagnetism, geomagnetism, Non Destructive Evaluation (NDE), metrology or fundamental science. For all these applications, the SQUID sensor is used in analog mode and associated with a carefully designed room-temperature control and/or feedback electronics. Nevertheless, the use of SQUID sensors in digital mode is of high interest for several applications due to their quantum accuracy associated to high linearity, and their potentially very high slew rate and dynamic range. The concept and performances of a low-Tc digital magnetometer based on Single-Flux-Quantum (SFQ) logic, fabricated at the FLUXON-ICS Foundry located at IPHT Jena, Germany, are given after a presentation of the context of development of superconductive digital magnetometers. The sensitivity, limited to one magnetic single flux quantum, and a dynamic range of 76 dB, that corresponds to an upper limit of the magnetic field amplitude higher than 5 μT, have been measured along with overnight stability. The dynamic range of about 2800 magnetic flux quanta Φ 0 has been experimentally observed with an external magnetic field. First signatures of magnetic fields have been observed simultaneously with the ones of analog SQUIDs in the low noise environment of the Laboratoire Souterrain a Bas Bruit (LSBB) located in Rustrel, Provence, France. |
| Databáze: | OpenAIRE |
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