title: A cargo inspection system based on pulsed fast neutron analysis (PFNA).
abstract: A cargo inspection system based on pulsed fast neutron analysis (PFNA) is to be used at a border crossing to detect explosives and contraband hidden in trucks and cargo containers. Neutrons are produced by the interaction of deuterons in a deuterium target mounted on a moveable scan arm. The collimated pulsed fast neutron beam is used to determine the location and composition of objects in a cargo container. The neutrons produce secondary gamma rays that are characteristic of the object's elemental composition. The cargo inspection system building consists of an accelerator room and an inspection tunnel. The accelerator room is shielded and houses the injector, accelerator and the neutron production gas target. The inspection tunnel is partially shielded. The truck or container to be inspected will be moved through the inspection tunnel by a conveyor system. The facility and radiation source terms considered in the shielding design are described.
authors.affiliation: Shielding Design, Dosimetry and Radiation Protection, San Carlos, CA 94070, USA. nisy@comcast.net
authors.forename: N E
authors.initials: NE
authors.lastname: Ipe
authors.forename: R
authors.initials: R
authors.lastname: Olsher
authors.forename: P
authors.initials: P
authors.lastname: Ryge
authors.forename: J
authors.initials: J
authors.lastname: Mrozack
authors.forename: J
authors.initials: J
authors.lastname: Thieu
mesh_terms: D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D005214:Fast Neutrons; D010315:Particle Accelerators / Q000295:instrumentation*; D019064:Product Packaging; D011829:Radiation Dosage; D011835:Radiation Protection / Q000295:instrumentation* / Q000379:methods; D011874:Radiometry / Q000295:instrumentation* / Q000379:methods; D012637:Security Measures; D014186:Transportation / Q000295:instrumentation*; D014481:United States