Neutron Diffraction Studies of a Fully Asymmetric Diffraction Geometry of a Bent Perfect Crystal with the Output Beam Compression |

P. Mikula
^{ a}, M. Vrána^{ a}, J. Šaroun^{ a}, V. Em^{ b} and J. Čapek^{ c}^{a}Nuclear Physics Institute ASCR, v.v.i., 25068 Řež, Czech Republic
^{b}National Research Centre "Kurchatov Institute", Moscow, 123182, Russia
^{c}Faculty of Mathematics and Physics, Charles University, 12116 Prague, Czech Republic |

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In this paper studies of neutron diffraction properties of the double crystal (+n,-m) setting of a bent perfect crystal Si(311) in the fully asymmetric diffraction geometry with the output beam compression and the bent perfect crystal Si(220) in a symmetric diffraction geometry, are presented. The properties of the (+n,-m) setting were studied for different curvatures of the individual crystal slabs. It has been found that after a beam condensation this fully asymmetric diffraction geometry can provide a monochromatic beam of a small width and of a practical use. |

DOI: 10.12693/APhysPolA.130.1114 PACS numbers: 03.75.Be, 25.40.Dn, |