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Proceedings Paper

Neutron imaging with Bragg mirrors
Author(s): Alexandru Dan Stoica; Xun-Li Wang; Mihai Popovici; Camden R. Hubbard
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Paper Abstract

Phase-space analysis of neutron optics has revealed that neutron imaging by Bragg reflection from thick bent perfect crystals can be non-dispersive (independent of the neutron wavelength), like with an optical mirror. The corresponding devices, called Bragg mirrors (BM), can be used for neutron imaging at pulsed neutron sources. Using a position sensitive detector (PSD) and time-of-flight analysis (TOF), a BM imaging system will make it possible to collect both real space mapping data and scattering space data simultaneously. Each pixel of PSD will correspond to a point in the sample and will contain a segment of the diffraction pattern (useful for strain, texture or phase analysis), or of an inelastic spectrum. In this paper the resolution and efficiency of BM in TOF diffraction experiments are calculated and compared with the usual sequential method of mapping. Experimental tests performed at steady state neutron sources showed sub-millimeter spatial resolution in the one-dimensional case.

Paper Details

Date Published: 8 November 2001
PDF: 12 pages
Proc. SPIE 4509, Neutron Optics, (8 November 2001); doi: 10.1117/12.448060
Show Author Affiliations
Alexandru Dan Stoica, Oak Ridge National Lab. (United States)
Xun-Li Wang, Oak Ridge National Lab. (United States)
Mihai Popovici, Univ. of Missouri/Columbia (United States)
Camden R. Hubbard, Oak Ridge National Lab. (United States)

Published in SPIE Proceedings Vol. 4509:
Neutron Optics
James L. Wood; Ian S. Anderson, Editor(s)

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