Sensivitity improvement in low-profile distributed detector systems for tracking sources in transit.
The RadTrac real-time detection and tracking software runs on a laptop computer networked to gamma-radiation detectors. A probabilistic estimate for source position is generated by combining measured count rate data with a first-principles stochastic model for the space and time dependence of count rates and knowledge of detector intrinsic efficiency. Recent development work has focused on improving RadTrac sensitivity in low-count rate situations. A method has been developed for processing count rates by energy according to that part of the energy spectrum with the greatest signal-to-noise ratio. In addition a method has been developed that places constraints on the solution that are physically appropriate when count rates approach background. In both instances experiments with a weak source confirmed the uncertainty in estimated position is reduced.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States)
- Sponsoring Organization:
- USDOE Office of Science (SC)
- DOE Contract Number:
- DE-AC02-06CH11357
- OSTI ID:
- 971142
- Report Number(s):
- ANL/NE/CP-59033; TRN: US201003%%592
- Resource Relation:
- Conference: 2007 IEEE Conference on Technologies for Homeland Security Enhancing Critical Infrastructure Dependability; May 16, 2007 - May 17, 2007; Woburn, MA
- Country of Publication:
- United States
- Language:
- ENGLISH
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