Asymmetric diffraction geometry of the bent crystal monochromator - A way to improve the properties of strain diffractometers

Abstract

The possibility to advantageously exploit the asymmetric diffraction geometry of bent perfect crystals was studied with the aim of further increasing the detector signal and/or resolution of the strain diffractometer in Studsvik. It was proved that, in the case of strain diffractometers, the asymmetric diffraction geometry of the bent perfect crystal monochromator with output-beam extension can be considerably superior to the asymmetric geometry with output-beam compression usually used in powder diffractometry.