GEANT4 particle simulations in support of the neutron interrogation project


Corporate Authors
Defence R&D Canada - Suffield, Ralston ALTA (CAN);ANS Technologies Inc., Montreal QC (CAN)
DRDC Suffield is developing nuclear-based technologies that will provide the Canadian Forces (CF) and other Public Security agencies with advanced explosives detection capabilities, such as to aid in the identification and evaluation of vehicle borne Improvised Explosive Devices (IEDs). As part of this effort, they require a high-precision, flexible neutron transport simulation program consistent with their existing analysis tools. Geant4 is a recently developed open-source C++ based radiation simulation package created by a world-wide collaboration of universities and provides a complete set of tools for all areas of detector simulation. As the Geant4 code base is relatively new and not widely used outside the physics community only a few attempts have been made to create a parallel version capable of working on a commodity component computer cluster. A previous contract, W7702-06R108, developed a parallel Geant4 simulation framework, TNAG4Sim, running on the DRDC Suffield parallel Linux cluster. However, that code suffered from an artificial limitation in total event number, limiting the statistical accuracy of the output data. This report provides an explanation and proposes a solution to the event limit problem. Data persistency was included using Reflex with ROOT I/O method, and data analysis tools written for extracting a ROOT readable files from the Reflex/ROOT format to an independent ROOT ntuple. Lastly, a pile-up analysis tool is provided. We report on a successful
Simulation;GEANT4;Fast Neutron Analysis;Thermal Neutron Analysis;Explosive;Detection;Thermal Neutron Activation (TNA);IED (Improvised Explosive Device);IED detection;VBIED (Vehicle Borne Improvised Explosive Devices);Open source
Report Number
DRDC-SUFFIELD-CR-2008-235 — Contractor Report
Date of publication
01 Dec 2007
Number of Pages

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