Title: BENEFITS OF TIME CORRELATION MEASUREMENTS FOR PASSIVE SCREENING
Authors: MURER DavidBLACKIE DouglasPEERANI Paolo
Citation: INTERNATIONAL JOURNAL OF MODERN PHYSICS E-NUCLEAR PHYSICS vol. 27 p. 1460132
Publisher: WORLD SCIENTIFIC PUBL CO PTE LTD
Publication Year: 2014
JRC N°: JRC95720
ISSN: 0218-3013
URI: http://www.worldscientific.com/doi/abs/10.1142/S201019451460132X
http://publications.jrc.ec.europa.eu/repository/handle/JRC95720
DOI: 10.1142/S201019451460132X
Type: Articles in periodicals and books
Abstract: The “FLASH Portals Project” is a collaboration between Arktis Radiation Detectors Ltd (CH), the Atomic Weapons Establishment (UK), and the Joint Research Centre (European Commission), supported by the Technical Support Working Group (TSWG). The program’s goal was to develop and demonstrate a technology to detect shielded special nuclear materials (SNM) more efficiently and less ambiguously by exploiting time correlation. This study presents experimental results of a two-sided portal monitor equipped with in total 16 4He fast neutron detectors as well as four polyvinyltoluene (PVT) plastic scintillators. All detectors have been synchronized to nanosecond precision, thereby allowing the resolution of time correlations from timescales of tens of microseconds (such as (n,alpha) reactions) down to prompt fission correlations directly. Our results demonstrate that such correlations can be detected in a typical radiation portal monitor (RPM) geometry and within operationally acceptable time scales, and that exploiting these signatures significantly improves the performance of the RPM compared to neutron counting. Furthermore, the results show that some time structure remains even in the presence of heavy shielding, thus significantly improving the sensitivity of the detection system to shielded SNM.
JRC Directorate:Nuclear Safety and Security

Files in This Item:
There are no files associated with this item.


Items in repository are protected by copyright, with all rights reserved, unless otherwise indicated.