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Electrical resistance tomography of unsaturated flow and transport in Yucca Mountain

Description: Electrical Resistance Tomography (ERT), a new geophysical imaging technique, was used to study the movement of a tracer through the test block at the Unsaturated Zone Transport Test (UZTT) at Busted Butte, Nevada. Data were collected four times starting in July and ending in early September, 1998. ERT baseline images show a resistivity structure which is consistent with the known lithology in the rear part of the test block. There appears to be a low resistivity region in the front half of the … more
Date: December 28, 1998
Creator: Buettner, H M; Bussod, G; Daily, W & Ramirez, A
Partner: UNT Libraries Government Documents Department
open access

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

Description: 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-surf… more
Date: August 28, 1998
Creator: Kraus, R. H., Jr.; Flynn, E. R.; Espy, M. A.; Matlachov, A.; Overton, W.; Wood, C. C. et al.
Partner: UNT Libraries Government Documents Department
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