A MICRO BEAM COLLIMATOR FOR HIGH RESOLUTION XRD INVESTIGATIONS WITH CONVENTIONAL DIFFRACTOMETERS

摘要

A micro collimator for compressing X-ray beams for use in a X-raydiffractometer is described, wherein said collimator has a channel means forproviding a channel guiding said X-ray beams, said channel having a channelentrance portion and a channel exit portion. The object of the invention is toprovide a micro beam collimator capable of being used in a conventional X-raydiffractometer with the Bragg-Brentano geometry, so as to enable thecharacterisation of very small sample regions without need of very largeradiation sources (synchrotron). For solving this technical problem it isproposed to form the channel means by two opposite, polished, oblong platemeans made of or coated with a material selected from the group consisting ofthe heavyweight metals and materials having total reflection propertiescomparable to those of the heavyweight metals.