Moving Sources Detection Algorithm for Radiation Portal Monitors Used in a Linear Network

To monitor radioactivity passing through a vehicle such as a pedestrian, a car, a train or a truck, Radiation Portal Monitors (RMP) are commonly employed. These detection systems consist of a large volume detector set close to the potential source path. An alarm is then triggered when the signal ris...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2014-08, Vol.61 (4), p.2189-2194
Main Authors: Coulon, Romain, Kondrasovs, Vladimir, Boudergui, Karim, Normand, Stéphane
Format: Article
Language:English
Subjects:
Algorithm
Algorithms
Automotive engineering
Correlation
Correlation detection
detection
Detectors
Engineering Sciences
filter
instrument
Instrumentation and Detectors
measurement
monitor
Monitoring
Monitors
moving
Networks
nuclear
Nuclear Experiment
Physics
Portals
radiation
radioactive
Radioactivity
safeguard
Security
Signal and Image processing
signal processing
source
Statistics
time series analysis
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Summary:To monitor radioactivity passing through a vehicle such as a pedestrian, a car, a train or a truck, Radiation Portal Monitors (RMP) are commonly employed. These detection systems consist of a large volume detector set close to the potential source path. An alarm is then triggered when the signal rises over a threshold initially estimated in view of the natural background signal. The approach developed in this work makes use of several detectors in a network along the source path. The correlation detection approach is elaborated to take into account the temporal periodicity of the signals taken by all distributed sensors as a whole. This new detection method is then not based only on counting statistics but also on the temporal series analysis. Therefore, a specific algorithm has been developed in our laboratory for this security application and shows a significant improvement, especially in terms of detection probability increase and false alarm reduction. This paper presents the theoretical approach and promising results obtained by simulation.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2014.2299872