Design of thick apertures for high-resolution neutron penumbral imaging

Conference · Sun Apr 01 04:00:00 EDT 1990 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA)

OSTI ID:6871777

Ress, D ^[1]

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1. Lawrence Livermore National Lab., CA (USA)

A general technique is presented for designing the thick apertures required to image penetrating radiation with high resolution. The new apertures are tapered in such a way that the radius of curvature varies inversely with distance from the source plane. The technique is used to design a high-resolution neutron penumbral-aperture microscope planned for the Nova laser. The design provides a resolution (determined by the sharpness of the aperture point-spread function) of {<=} 10 {mu}m over a field of view of 150 {mu}m. The point-spread function of these apertures is sufficiently isoplanatic and distortion-free to allow linear reconstruction of complex source distributions. The design is generally appropriate for similar imaging techniques, such as high-resolution neutron or gamma-ray pinhole imaging.

• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6871777
• Report Number(s): CONF-900143--
• Conference Information: Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA) Journal Volume: 37:2
• Country of Publication: United States
• Language: English

Related Subjects

440103* -- Radiation Instrumentation-- Nuclear Spectroscopic Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
700102 -- Fusion Energy-- Plasma Research-- Diagnostics
APERTURES
DESIGN
ELECTROMAGNETIC RADIATION
GAMMA RADIATION
IONIZING RADIATIONS
MEASURING INSTRUMENTS
MICROSCOPES
NEUTRON DETECTORS
NOVA FACILITY
OPENINGS
PLANNING
PLASMA DIAGNOSTICS
RADIATION DETECTORS
RADIATIONS