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The Practicality of Pulsed Fast Neutron Transmission Spectroscopy for Aviation Security (Paperback)
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The Practicality of Pulsed Fast Neutron Transmission Spectroscopy for Aviation Security (Paperback)
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A major goal of the Federal Aviation Administration (FAA), and now
the Transportation Security Administration (TSA), is the
development of technologies for detecting explosives and illegal
drugs in freight cargo and passenger luggage. One such technology
is pulsed fast neutron analysis (PFNA). This technology is based on
detection of signature radiation (gamma rays) induced in material
scanned by a beam of neutrons. While PFNA may have the potential to
meet TSA goals, it has many limitations. Because of these issues,
the government asked the National Research Council to evaluate the
potential of PFNA for airport use and compare it with current and
future x-ray technology. The results of this survey are presented
in "Assessment of the Practicality of Pulsed Fast Neutron Analysis
for Aviation Security.? A broad range of detection methods and test
results are covered in this report. Tests conducted as of October
2000 showed that the PFNA system was unable to meet the stringent
federal aviation requirements for explosive detection in air cargo
containers. PFNA systems did, however, demonstrate some superior
characteristics compared to existing x-ray systems in detecting
explosives in cargo containers, though neither system performed
entirely satisfactorily. Substantial improvements are needed in the
PFNA detection algorithms to allow it to meet aviation detection
standards for explosives in cargo and passenger baggage. The PFNA
system currently requires a long scan time (an average of 90
minutes per container in the prototype testing in October 2000),
needs considerable radiation shielding, is significantly larger
than current x-ray systems, and has high implementation costs.
These factors are likely to limit installation at airports, even if
the detection capability is improved. Nevertheless, because PFNA
has the best potential of any known technology for detecting
explosives in cargo and luggage, this book discusses how continued
research to improve detection capabilities and system design can
best be applied for the airport environment.
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