| US 7,488,934 B2 | ||
| Geological tomography using cosmic rays | ||
| Douglas Bryman, Vancouver (Canada) | ||
| Assigned to Advanced Applied Physics Solutions, Inc., Vancouver, B.C. (Canada) | ||
| Filed on Feb. 17, 2006, as Appl. No. 11/356,244. | ||
| Claims priority of provisional application 60/653527, filed on Feb. 17, 2005. | ||
| Prior Publication US 2006/0180753 A1, Aug. 17, 2006 | ||
| Int. Cl. G01V 5/00 (2006.01) | ||
| U.S. Cl. 250—266 [250/253; 250/265; 250/269.8] | 24 Claims |
| 1. A method for mapping subterranean densities in a survey region comprising:
positioning a plurality of muon detectors at a plurality of subterranean locations adjacent to a test region, at least one
of the plurality of muon detectors having a drift region and a voltage plane;
generating an electric field with the voltage plane to drift ionization electrons along a longitudinal axis of the muon detector
away from the voltage plane toward an end of the drift region, the ionization electrons produced by one or more muons traversing
the drift region;
detecting the ionization electrons;
collecting muon detection data from the plurality of muon detectors for a plurality of intersecting trajectories; and
processing the collected muon detection data to form a density map of the test region.
|