National
Security
Passive
and Active Gamma and Neutron Imaging
Imaging
for Treaty Verification and Wide Area Search and Localization
 Researchers
at ORNL are adapting, developing, testing, and evaluating passive
gamma-ray spectroscopy and imaging technologies that support homeland
security initiatives. New robust directional gamma-ray cameras are
required to provide capabilities for detecting, localizing, imaging,
identifying, verifying, and characterizing radiation sources associated
with special nuclear materials, improvised nuclear devices, and
radioactive dispersive devices. While the initial focus of these
activities is to provide federal, state, and local governments with
technologies for early detection and intervention at U.S. borders,
these technologies also potentially provide additional capabilities
for a host of security applications that include inhibiting nuclear
materials diversion,
international safeguard support, and the interdiction of nuclear
and fissile material smuggling, and will provide critical tools
and infrastructure for pre- and post-event scenarios.
Base
Technology
ORNL
is working with multiple technologies that can provide gamma (passive)
and neutron (active) imaging capabilities for near-field, far-field
scanning as well as for detailed computed tomography applications
to peer into the geomoetry of potentially fissile materials in closed
containers. These technologies include passive imaging with simplified
coded aperture devices, direct spatial frequency measurements with
terrestrial Fourier cameras, and coincidence measuremements for
computed tomography to dicern the geomerty of enclosed fissile materials.
 Specifications
and Features
- Source
and detector modeling capabilities
- Passive
gamma-ray imaging
- Novel
implementations with simplified designs
- Active
interrogation neutron computed tomography
Point
of Contact:
Kenneth W. Tobin, Ph.D.
Group Leader, Image Science & Machine Vision
Engineering Science and Technology Division
Oak Ridge National Laboratory
P.O. Box 2008, MS-6010
Oak Ridge, Tennessee 37831-6010
Office: (865) 574-8521
E-mail: tobinkwjr@ornl.gov
Fact
Sheet available here in PDF format.
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