Radiant energy – Invisible radiant energy responsive electric signalling – With means to inspect passive solid objects
Patent
1991-02-19
1992-06-23
Hannaher, Constantine
Radiant energy
Invisible radiant energy responsive electric signalling
With means to inspect passive solid objects
25039002, 25039004, 376159, G01N 2300, G01N 2305
Patent
active
051245540
ABSTRACT:
Apparatus for non-invasively inspecting an object, such as an item of luggage, for explosives material comprises a multi-channel thermal neutron inspection system having a plurality of neutron irradiation chambers. Simultaneous operation of several channels increases maximum system throughout several times. Each chamber has a lithium neutron source which is stimulated to neutron production by a proton beam. Beam switching magnets are energized by pulsing to divert a common proton beam to each source in turn. The initial beam is generated by a radio frequency quadrupole accelerator. The advantages of this system are very low residual source activity and controllable neutron production thereby minimizing safety hazards. The irradiation chamber may contain several different gamma ray detectors to identify the presence elements present in explosives material. In addition a neutron radiography imaging means may be employed to identify the presence of potential shielding materials.
REFERENCES:
patent: 3832545 (1974-08-01), Bartko
patent: 4851687 (1989-07-01), Ettinger et al.
patent: 4864142 (1989-09-01), Gomberg
Foster et al., "Method for Measuring Total Cross Sections with Neutrons Having Energies from 2.5 MeV to 15 MeV", Nuclear Instruments & Methods 36, pp. 1-12.
Gonazi et al., "Explosive Detection System Based on Thermal Neutron Activation", IEEE AES Magazine, Dec. 1989, pp. 17-20.
Swinth, Conference, Proceedings of the Society of Photo Optical Instrumentation; Engineers Seminar on Imaging Techniques for Testing and Inspection, Los Angeles, Cailf. 1972, pp. 23-30.
"Neutrons Give Ray of Hope in Halting Plastic Explosive", the Sunday Times (London, England) 22 Jan. 1989.
"Neutron Detection for Kennedy", Flight International, 8 Jul. 1989.
"Airport Detectors not Ready for Terrorists", New Scientist, 26 Jan. 1991.
Allen Martin J.
Fowler Peter H.
Rogers John D.
Stewart Peter A. E.
Glick Edward J.
Hannaher Constantine
Rolls-Royce and Associates Limited
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