PROGRESS OF THE AVNG SYSTEM - ATTRIBUTE VERIFICATION SYSTEM WITH INFORMATION BARRIERS FOR MASS AND ISOTOPICS MEASUREMENTS

Year
2005
Author(s)
Tim Elmont - Los Alamos National Laboratory
Douglas R. Mayo - Los Alamos National Laboratory
S. John Luke - Lawrence Livermore National Laboratory
Duncan MacArthur - Los Alamos National Laboratory
Diana Langner - Los Alamos National Laboratory
Dmitry Budnikov - All Russian Scientific Research Institute of Experimental Physics
Igor Jarikhine - All Russian Scientific Research Institute of Experimental Physics
Alexander Livke - All Russian Scientific Research Institute of Experimental Physics
Alexander Modenov - All Russian Scientific Research Institute of Experimental Physics
Anton Morkin - All Russian Scientific Research Institute of Experimental Physics
Sergey Safronov - All Russian Scientific Research Institute of Experimental Physics
Abstract
An attribute verification system (AVNG) with information barriers for mass and isotopics measurements has been designed and its fabrication is nearly completed. The AVNG is being built by scientists at the Russian Federal Nuclear Center-VNIIEF, with support of Los Alamos National Laboratory (LANL) and Lawrence Livermore National Laboratory (LLNL). Such a system could be used to verify the presence of several unclassified attributes of classified material with no classified information release. The system is comprised of a neutron multiplicity counter and gamma-spectrometry system based on a high purity germanium gamma detector (nominal relative efficiency @ 1332 keV 50%) and digital gamma-ray spectrometer DSPECPLUS. The neutron multiplicity counter is a three ring counter with 164 3He tubes. The system was designed to measure prototype containers 491 mm in diameter and 503 mm high. This paper provides a brief history of the project and documents the progress of this effort with drawings and photographs.