DViN-2 Stationary Inspection Complex

A DViN-2 stationary inspection complex has been designed and manufactured for identifying hidden explosives and drugs. The identification of hidden substances is based on the method of tagged neutrons. The source of the tagged neutron beam, which has an energy of 14.1 MeV produced in the reaction d + t α + n , is a portable neutron generator with a built-in 9-channel silicon α detector. The DViN-2 makes it possible to iden- tify hidden explosives and drugs with a mass of from 100 g to 50 kg in objects with dimensions from 50 to 400 mm in all three directions. The results of 76 experiments testify to the high efficiency of the DViN-2 in regards to iden- tifying hidden explosives and drugs and it has a rather low probability of false actuations: the probability of iden- tifying explosives and drugs is 94%, and that of false alarms rate is 3%. The time it takes to identify hidden sub- stances, depending on their mass and the thickness of the shielding material layer, is 3-7 min for an average neu- tron beam intensity into a solid angle of 4 π of 2 × 10 7 s -1 .