23 November 1992 Neutron microfocusing by double reflection on curved perfect crystals
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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.
© (1992) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Alexander Mihai Popovici, Alexander Mihai Popovici, William B. Yelon, William B. Yelon, } "Neutron microfocusing by double reflection on curved perfect crystals", Proc. SPIE 1738, Neutron Optical Devices and Applications, (23 November 1992); doi: 10.1117/12.130652; https://doi.org/10.1117/12.130652


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