System and apparatus for neutron radiography

Patent · Tue Jul 02 04:00:00 EDT 1991

OSTI ID:5916734

Whittemore, W L

This patent describes a neutron radiography apparatus. It comprises an imaging plane; a neutron moderator having a cavity defining a convergent collimator, the cavity having a base and converging walls of neutron moderating material terminating at an aperture; a divergent collimator coaxially joined to the cavity at the aperture, the divergent collimator having diverging walls of radiation- absorbing material extending from the aperture to an expanded distal opening for irradiating the imaging plane; sources of neutrons disposed symmetrically about the base of the cavity; a neutron moderating material disposed for maximum neutron thermalization between the sources and the base of the cavity; and means for substantially shielding the plane from electromagnetic energy.

• Assignee: General Atomics, San Diego, CA (United States)
• Patent Number(s): A; US 5028789
• Application Number: PPN: US 7-398748
• OSTI ID: 5916734
• Country of Publication: United States
• Language: English

Related Subjects

440101* -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
COLLIMATORS
DESIGN
EQUIPMENT
INDUSTRIAL RADIOGRAPHY
NEUTRON RADIOGRAPHY
NEUTRON SOURCES
PARTICLE SOURCES
RADIATION SOURCES
SHIELDING
SLOWING-DOWN
THERMALIZATION