Actions for Secondary gamma-ray production in a coded aperture mask

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Secondary gamma-ray production in a coded aperture mask

Author
Bonfand, E.
Published
Aug 1, 1985.
Physical Description
1 electronic document
Additional Creators
Owens, A., Pendleton, G. N., Jenkins, T. L., Ramsden, D., Frye, G. M., Jr., Agrinier, B., Gouiffes, C., Carter, J. N., and Hall, C. J.
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Unclassified, Unlimited, Publicly available.
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Summary
The application of the coded aperture mask to high energy gamma-ray astronomy will provide the capability of locating a cosmic gamma-ray point source with a precision of a few arc-minutes above 20 MeV. Recent tests using a mask in conjunction with drift chamber detectors have shown that the expected point spread function is achieved over an acceptance cone of 25 deg. A telescope employing this technique differs from a conventional telescope only in that the presence of the mask modifies the radiation field in the vicinity of the detection plane. In addition to reducing the primary photon flux incident on the detector by absorption in the mask elements, the mask will also be a secondary radiator of gamma-rays. The various background components in a CAMTRAC (Coded Aperture Mask Track Chamber) telescope are considered. Monte-Carlo calculations are compared with recent measurements obtained using a prototype instrument in a tagged photon beam line.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19850026632.
Accession ID: 85N34945.
OG-9.2-6.
19th Intern. Cosmic Ray Conf - Vol. 3; p 314-317; NASA-CP-2376-VOL-3.
Terms of Use and Reproduction
No Copyright.
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