First Results for a Superconducting Imaging-Surface Sensor Array for Magnetocardiography

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The authors have completed fabrication and preliminary testing of a 12-channel SQUID array using the superconducting image-surface gradiometer concept. Sensor response to point dipole magnetic sources, and uniform fields used to simulate ambient magnetic fields followed predicted values to high precision. Edge effects were not observed for sources, within 5cm of the center of the imaging surface independent of whether the source is close or far from the surface. The superconducting imaging-surface also reduced uniform ambient fields at the SQUID sensors by approximately a factor of ten. Finally, a high degree of symmetry was observed between sides of the imaging ... continued below

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5 p.

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Kraus, R.H. Jr.; Flynn, E.R.; Espy, M.A.; Matlachov, A.; Overton, W.; Wood, C.C. et al. August 28, 1998.

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The authors have completed fabrication and preliminary testing of a 12-channel SQUID array using the superconducting image-surface gradiometer concept. Sensor response to point dipole magnetic sources, and uniform fields used to simulate ambient magnetic fields followed predicted values to high precision. Edge effects were not observed for sources, within 5cm of the center of the imaging surface independent of whether the source is close or far from the surface. The superconducting imaging-surface also reduced uniform ambient fields at the SQUID sensors by approximately a factor of ten. Finally, a high degree of symmetry was observed between sides of the imaging surface for uniform fields. This symmetry, together with the very small sensitivity of sensors on the back side of the imaging surface to sources close to the front side provides an excellent circumstance for implementing either digital or analog background rejection. Their goal is to implement a higher density array with the superconducting imaging surface, together with background rejection, and utilize this system for MCG and other biomagnetic studies.

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5 p.

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OSTI as DE00759288

Medium: P; Size: 5 pages

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  • Biomag 98, Sendai (JP), 08/28/1998--09/02/1998

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  • Report No.: LA-UR-98-3756
  • Grant Number: W-7405-ENG-36
  • Office of Scientific & Technical Information Report Number: 759288
  • Archival Resource Key: ark:/67531/metadc709713

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  • August 28, 1998

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  • Sept. 12, 2015, 6:31 a.m.

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  • April 11, 2017, 12:35 p.m.

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Kraus, R.H. Jr.; Flynn, E.R.; Espy, M.A.; Matlachov, A.; Overton, W.; Wood, C.C. et al. First Results for a Superconducting Imaging-Surface Sensor Array for Magnetocardiography, article, August 28, 1998; New Mexico. (digital.library.unt.edu/ark:/67531/metadc709713/: accessed November 17, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.