Physics – Instrumentation and Detectors
Scientific paper
2008-11-02
IEEE Trans.Nucl.Sci.56:1356-1363,2009
Physics
Instrumentation and Detectors
9 pages, 10 figures, submitted to conference proceedings of SORMA West 08, Berkeley
Scientific paper
10.1109/TNS.2009.2016197
Muon Tomography (MT) based on the measurement of multiple scattering of atmospheric cosmic ray muons traversing shipping containers is a promising candidate for identifying threatening high-Z materials. Since position-sensitive detectors with high spatial resolution should be particularly suited for tracking muons in an MT application, we propose to use compact micro-pattern gas detectors, such as Gas Electron Multipliers (GEMs), for muon tomography. We present a detailed GEANT4 simulation of a GEM-based MT station for various scenarios of threat material detection. Cosmic ray muon tracks crossing the material are reconstructed with a Point-Of-Closest-Approach algorithm to form 3D tomographic images of the target material. We investigate acceptance, Z-discrimination capability, effects of placement of high-Z material and shielding materials inside the cargo, and detector resolution effects for such a MT station.
Ford Patrick
Gnanvo Kondo
Helsby Jennifer
Hoch Richard
Hohlmann Marcus
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