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

Romain Coulon 1 Vladimir Kondrasovs 1 Karim Boudergui 1 Stéphane Normand 1
1 LCAE - Laboratoire Capteurs et Architectures Electroniques
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
Abstract : 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.
Keywords : security signal processing safeguard radioactive Algorithm detection filter instrument measurement monitor moving nuclear radiation source time series analysis Index Terms-Algorithm measure-ment
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Romain Coulon, Vladimir Kondrasovs, Karim Boudergui, Stéphane Normand. Moving Sources Detection Algorithm for Radiation Portal Monitors Used in a Linear Network. IEEE Transactions on Nuclear Science, Institute of Electrical and Electronics Engineers, 2014, 61 (4), pp.2189 - 2194. ⟨10.1109/TNS.2014.2299872⟩. ⟨cea-01830910⟩

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