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Proceedings Paper

Neutron microfocusing by double reflection on curved perfect crystals
Author(s): Alexander Mihai Popovici; William B. Yelon
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Paper Abstract

The imaging of large area neutron sources into millimeter-size spots by focusing with two curved perfect crystals is examined. In the parallel (+,-) setting large demagnifications can be achieved only with crystals in strongly asymmetric reflection. The most promising configurations appear to be those with crystals in antiparallel (+,+) setting. The beam intensities for the parallel and antiparallel settings of bent crystals are comparable, the reflection efficiency being enhanced by the reflectivity curve broadening. The instrument Q-resolution can be kept reasonably good in a limited range by phase space focusing. Results of neutron optics computations are presented for a diffractometer for stress scanning measurements and for a small-angle scattering instrument with long neutron paths.

Paper Details

Date Published: 23 November 1992
PDF: 9 pages
Proc. SPIE 1738, Neutron Optical Devices and Applications, (23 November 1992); doi: 10.1117/12.130652
Show Author Affiliations
Alexander Mihai Popovici, Stanford Univ. (United States)
William B. Yelon, Univ. of Missouri/Columbia (United States)

Published in SPIE Proceedings Vol. 1738:
Neutron Optical Devices and Applications
Charles F. Majkrzak; James L. Wood, Editor(s)

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