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Title: INITIAL EVALUATION OF A PULSED WHITE SPECTRUM NEUTRON GENERATOR FOR EXPLOSIVE DETECTION

Successful explosive material detection in luggage and similar sized containers is acritical issue in securing the safety of all airline passengers. Tensor Technology Inc. has recently developed a methodology that will detect explosive compounds with pulsed fast neutron transmission spectroscopy. In this scheme, tritium beams will be used to generate neutrons with a broad energy spectrum as governed by the T(t,2n)4He fission reaction that produces 0-9 MeV neutrons. Lawrence Berkeley National Laboratory (LBNL), in collaboration with Tensor Technology Inc., has designedand fabricated a pulsed white-spectrum neutron source for this application. The specifications of the neutron source are demanding and stringent due to the requirements of high yield and fast pulsing neutron emission, and sealed tube, tritium operation. In a unique co-axial geometry, the ion source uses ten parallel rf induction antennas to externally couple power into a toroidal discharge chamber. There are 20 ion beam extraction slits and 3 concentric electrode rings to shape and accelerate the ion beam into a titanium cone target. Fast neutron pulses are created by using a set ofparallel-plate deflectors switching between +-1500 volts and deflecting the ion beams across a narrow slit. The generator is expected to achieve 5 ns neutron pulses at tritiummore » ion beam energies between 80 - 120 kV. First experiments demonstrated ion source operation and successful beam pulsing.« less
Authors:
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Publication Date:
OSTI Identifier:
957034
Report Number(s):
LBNL-1074E
TRN: US1000663
DOE Contract Number:
DE-AC02-05CH11231
Resource Type:
Conference
Resource Relation:
Conference: 2008 Symposium on Radiation Measurements and Applications, Berkeley, CA , June 2-5, 2008
Research Org:
Ernest Orlando Lawrence Berkeley National Laboratory, Berkeley, CA (US)
Sponsoring Org:
Accelerator& Fusion Research Division
Country of Publication:
United States
Language:
English
Subject:
46; 98; 43; ANTENNAS; CONES; CONTAINERS; DETECTION; ELECTRODES; EXPLOSIVES; FAST NEUTRONS; FISSION; GEOMETRY; INDUCTION; ION BEAMS; ION SOURCES; NEUTRON EMISSION; NEUTRON GENERATORS; NEUTRON SOURCES; NEUTRONS; RADIATIONS; SPECIFICATIONS; SPECTROSCOPY; TITANIUM; TRITIUM; TRITIUM IONS neutron generator, explosive detection, containers, Tensor