Localization of radioactive source using a network of small form factor CZT sensors

Abstract

A: We present a small factor (0.5 cm 3 ) CZT static sensor network consisted of a number of Non-Directional Detectors (NDD) capable to localize bare and lightly shielded radiation sources. The localization is performed with a fusion algorithm based on a fast analytical technique. The algorithm has been tested using simulated data and verified with experimental data from a static 137 Cs source of 7 MBq. The localization accuracy of the order of 15 cm has been archived in 3D for bare sources and of the order of 20 cm in 2D for light shielded sources within a monitored volume of 5 m × 2.8 m × 2 m. K: Radiation monitoring; Search for radioactive and fissile materials 1Corresponding author.

Particle Filter Based Range Search Approach for Localization of Radioactive Materials

“…A geostatistical interpolation method that uses the given measurements to estimate positions where data were not collected based on Poisson kriging is presented (Zhao et al, 2019). Fragkos et al (2020) developed a fusion algorithm based on an analytical procedure for five sensors. This analytical method did not consider the geometrical form factors of the sensors and the radiation attenuation of the medium between the source and the sensors, which contributed to lower localization accuracy.…”

Radioactive source localization using a data driven MVA method

“…The benefit of this approach is that without any significant computational cost the effects of both the radiation absorption and scattering can be taken into account, which in other circumstances would require a detailed description of the surrounding materials in order to produce reliable simulated data of the experimental setup. When the effect of the radiation absorption and scattering is not taken into account the source localization especially in the depth direction (source transverse distance from the sensor plain) could be biased or not been able to be estimated at all especially when dealing with slightly shielded sources [6]. 5) NDD in a planar cruciform topology (S2, S5, S7, S8, S9) in blue.…”