1-pT noise fluxgate magnetometer for geomagnetic measurements and unshielded magnetocardiography
Typ dokumentu
článek v časopisejournal article
Peer-reviewed
acceptedVersion
Autor
Janošek M.
Butta M.
Dressler M.
Saunderson E.
Novotný D.
Fourie C.
Práva
Creative Commons Attribution-ShareAlike (CC BY-SA) 4.0http://creativecommons.org/licenses/by-sa/4.0/
openAccess
Metadata
Zobrazit celý záznamAbstrakt
We present the development of a low-noise, fundamental-mode, orthogonal fluxgate magnetometer with four amorphous, annealed ferromagnetic wires. The 1-Hz noise obtained in open-loop and closed-loop is as low as 0.75 and 1.5 pTrms/√Hz, respectively, with white noise level about 0.6 pTrms/√Hz. This is to our knowledge the lowest figure published for a fluxgate magnetometer so far. We compared the instrument performance to a low-noise observatory magnetometer when doing geomagnetic measurements and show that it is fully suitable for measurements at mHz frequencies, e.g. magnetotellurics. The magnetometer performance enables room-temperature, unshielded magnetocardiography.
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Kolekce
- Publikační činnost ČVUT [1340]
Kromě případů, kde je uvedeno jinak, licence tohoto záznamu je Creative Commons Attribution-ShareAlike (CC BY-SA) 4.0