Design of thick apertures for high-resolution neutron penumbral imaging

Author

Ress, D.

Author_Institution

Lawrence Livermore Nat. Lab., CA, USA

Volume

37

Issue

2

fYear

1990

fDate

4/1/1990 12:00:00 AM

Firstpage

155

Lastpage

160

Abstract

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 μm over a field of view of 150 μm. The point-spread function of these apertures is sufficiently isoplanatic and distortion-free to allow linear reconstruction of complex source imaging techniques, such as high-resolution neutron or gamma-ray pinhole imaging

Keywords

neutron detection and measurement; particle detectors; Nova laser; complex source imaging techniques; gamma-ray pinhole imaging; high-resolution neutron penumbral-aperture microscope; linear reconstruction; penetrating radiation; point-spread function; source plane; Apertures; Gold; High-resolution imaging; Image reconstruction; Image resolution; Laboratories; Neutrons; Optical imaging; Scattering; Spatial resolution;

fLanguage

English

Journal_Title

Nuclear Science, IEEE Transactions on

Publisher

ieee

ISSN

0018-9499

Type

jour

DOI

10.1109/23.106610

Filename

106610