Using Associated Particle Technique for Detection of Shielded Nuclear Materials (Nm) Detection of Heavily Shielded Nm

Кузнецов, А. В.; Вахтин, Д. Н.; Gorshkov, Igor; Evsenin, A.; Osetrov, O. I.

doi:10.1007/1-4020-4921-8_20

Cited by 2 publications

(1 citation statement)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…7) within a time window triggered by the alpha detector. Two-fold coincidences, due to (n,2n) or (n,n'γ) reactions are expected from the interaction of tagged neutrons with nonnuclear materials, whereas three-fold or higher level coincidences are expected when neutrons induce fissions in SNM [6], [7] and [8]. Thus, regardless cross talk effects between adjacent detectors which are treated by data processing (clusters of detectors [9]), the detection of at least three particles in coincidence with the alpha particle signs the presence of SNM with respect to benign materials.…”

Section: Simulation Of Cargo Container Inspectionmentioning

confidence: 99%

Passive and active correlation techniques for the detection of Nuclear Materials

Deyglun¹,

Carasco²,

Pérot³

et al. 2013

2013 3rd International Conference on Advancements in Nuclear Instrumentation, Measurement Methods and Their Applications (ANIMM

View full text Add to dashboard Cite

In the frame of the French trans-governmental R&D program against CBRN-E threats, CEA (French Alternative Energies and Atomic Energy Commission) is studying the detection of Special Nuclear Materials (SNM) by neutron interrogation with the Associated Particle Technique (APT). Coincidences including at least 3 fission neutrons or gamma rays induced by tagged neutrons are used to detect and distinguish SNM from benign materials in which lower multiplicity events of 1 or 2 particles are produced by (n,2n) or (n,n'γ) reactions. Coincidence are detected by fast plastic scintillators and correlated with tagged neutrons to improve the signal-to-noise ratio. Dedicated data acquisition electronics (DAQ) has been developed with independent FPGA cards associated to each detector, so that the acquisition window can be opened by any of the plastic scintillators. DAQ tests in passive mode are presented, in which acquisition is triggered by the sum signal of all detectors. The system time and energy calibration and resolution are reported, as well as the qualification of numerical simulations thanks to experimental data acquired with simple setups using a 252 Cf source. Numerical studies for the design and performance of cargo container inspection are also performed with the MCNP-PoliMi computer code and the ROOT data analysis package. SNM detection in iron cargo is quite straightforward but in organic matrix, data processing will need to combine more information to evidence SNM.

show abstract

Section: Simulation Of Cargo Container Inspectionmentioning

confidence: 99%