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Proceedings Paper

Gamma-ray focusing telescope based on high reflective Ge and Si mosaic crystals
Author(s): M. Kozhukh; A. E. Bolotnikov; W. Kane
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Paper Abstract

A focusing gamma-ray telescope based upon perfect crystals was originally proposed for astrophysical observations in 1990s. However, the high angular resolution/low integral reflectivity of the perfect crystals employed made these types of optics less attractive for astrophysics than grazing incidence multilayer mirrors. Unlike astrophysical applications, the long-range detection of nuclear materials requires modest angular resolution and narrow energy bandwidth (or several narrow bands) at specific gamma-lines emitted from nuclear materials. A development of large high gamma-reflective Ge and Si mosaic crystals makes the use of a diffraction mosaic gamma-telescope for long-distance detection of nuclear materials, as well as for astrophysics, a distinct possibility. This paper describes gammareflectivity results for Ge mosaic crystals in the range of 100-300 keV and a gamma-ray focusing telescope design based on the Ge and Si mosaic crystals with mosaicity in range of 1-15 arc minutes both for long-range detection of nuclear materials and astrophysics.

Paper Details

Date Published: 10 September 2005
PDF: 9 pages
Proc. SPIE 5900, Optics for EUV, X-Ray, and Gamma-Ray Astronomy II, 590017 (10 September 2005); doi: 10.1117/12.620378
Show Author Affiliations
M. Kozhukh, AdSem, Inc. (United States)
A. E. Bolotnikov, Brookhaven National Lab. (United States)
W. Kane, Brookhaven National Lab. (United States)

Published in SPIE Proceedings Vol. 5900:
Optics for EUV, X-Ray, and Gamma-Ray Astronomy II
Oberto Citterio; Stephen L. O'Dell, Editor(s)

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