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Title: First results for a novel superconducting imaging-surface sensor array

Abstract

A superconducting imaging-surface system was constructed using 12 coplanar thin-film SQUID magnetometers located parallel to and spaced 2 cm from a 25 cm diameter lead imaging-plane. Some measurements included two additional sensors on the back side of the superconducting imaging-plane to study the field symmetry for the system. Performance was measured in a shielded can and in the open laboratory environment. Data from this system has been used to: (1) understand the noise characteristics of the dewar-SQUID imaging plate arrangement, (2) to verify the imaging principle, (c) measure the background rejection factor of the imaging plane, and (4) compare superconducting materials for the imaging plane. A phantom source field was measured at the sensors as a function of phantom distance from the sensor array to verify the imaging theory. Both the shape and absolute values of the measured and predicted curves agree very well indicating the system is behaving as a gradiometer in accordance with theory. The output from SQUIDs located behind the imaging surface that sense background fields can be used for software or analog background cancellation. Fields arising from sources close to the imaging plane were shielded from the background sensors by more than a factor of 1000.more » Measurement of the symmetry of sensor sensitivity to uniform fields exactly followed theoretical predictions.« less

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Energy Research, Washington, DC (United States)
OSTI Identifier:
350914
Report Number(s):
LA-UR-98-4086; CONF-9809130-
ON: DE99002589; TRN: AHC29921%%99
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Applied superconductivity conference, Palm Desert, CA (United States), 13-18 Sep 1998; Other Information: PBD: [1998]
Country of Publication:
United States
Language:
English
Subject:
55 BIOLOGY AND MEDICINE, BASIC STUDIES; SQUID DEVICES; MAGNETOMETERS; MEDICINE; DIAGNOSTIC USES; DIAGNOSTIC TECHNIQUES; MAGNETIC FIELDS; PERFORMANCE; NOISE; DEWARS; IMAGES; BRAIN; HEART

Citation Formats

Kraus, Jr, R H, Flynn, E R, Espy, M A, Matlashov, A, Overton, W, Peters, M V, and Ruminer, P. First results for a novel superconducting imaging-surface sensor array. United States: N. p., 1998. Web.
Kraus, Jr, R H, Flynn, E R, Espy, M A, Matlashov, A, Overton, W, Peters, M V, & Ruminer, P. First results for a novel superconducting imaging-surface sensor array. United States.
Kraus, Jr, R H, Flynn, E R, Espy, M A, Matlashov, A, Overton, W, Peters, M V, and Ruminer, P. 1998. "First results for a novel superconducting imaging-surface sensor array". United States. https://www.osti.gov/servlets/purl/350914.
@article{osti_350914,
title = {First results for a novel superconducting imaging-surface sensor array},
author = {Kraus, Jr, R H and Flynn, E R and Espy, M A and Matlashov, A and Overton, W and Peters, M V and Ruminer, P},
abstractNote = {A superconducting imaging-surface system was constructed using 12 coplanar thin-film SQUID magnetometers located parallel to and spaced 2 cm from a 25 cm diameter lead imaging-plane. Some measurements included two additional sensors on the back side of the superconducting imaging-plane to study the field symmetry for the system. Performance was measured in a shielded can and in the open laboratory environment. Data from this system has been used to: (1) understand the noise characteristics of the dewar-SQUID imaging plate arrangement, (2) to verify the imaging principle, (c) measure the background rejection factor of the imaging plane, and (4) compare superconducting materials for the imaging plane. A phantom source field was measured at the sensors as a function of phantom distance from the sensor array to verify the imaging theory. Both the shape and absolute values of the measured and predicted curves agree very well indicating the system is behaving as a gradiometer in accordance with theory. The output from SQUIDs located behind the imaging surface that sense background fields can be used for software or analog background cancellation. Fields arising from sources close to the imaging plane were shielded from the background sensors by more than a factor of 1000. Measurement of the symmetry of sensor sensitivity to uniform fields exactly followed theoretical predictions.},
doi = {},
url = {https://www.osti.gov/biblio/350914}, journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Dec 31 00:00:00 EST 1998},
month = {Thu Dec 31 00:00:00 EST 1998}
}

Conference:
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