Title :
In Situ Measurement of Electromagnetic Properties of Welded Tuff Under Compression
Author :
Daily, William D. ; Ramirez, Abelardo L.
Author_Institution :
Electronics Engineering Department and the Earth Sciences Department, Lawrence Livermore National Laboratory, University of California, Livermore, CA 94550
Abstract :
The high-frequency electromagnetic permittivity and attenuation rate were measured in situ in a block of densely welded ash flow tuff compressed uniaxially. For stress changes up to 800 psi, the electromagnetic properties were found to be independent of stress, except where the water content of fractures may have been controlled by aperture changes induced by the compressional loading.
Keywords :
Antennas and propagation; Ash; Dielectric constant; Electromagnetic measurements; Permittivity measurement; Radio frequency; Stress; Water heating; Water storage; Welding;
Journal_Title :
Geoscience and Remote Sensing, IEEE Transactions on
DOI :
10.1109/TGRS.1987.289758
