X=ray spectrometer - has independently rotatable crystal changer and detector which are adjustable in single and double angles respectively, memory for storing desired angles for certain elements, and controller for correcting measured angle

摘要

The X-ray spectrometer contains an X-ray tube, a specimen holder, eg for aluminium, several collimators (5,6) which can be pivoted into the beam path, several analyser crystals (8,9) on a rotatable crystal changer, an adjustable detector collimator (17), a detector (11) and an electronic controller (16). The crystal changer and detector are rotatable according to a eta /2 eta - relationship and the detector signal is measured depending on their angular position. The changer and detector each have an electrical drive (13,15) and are independently rotatable and adjustable to desired angles. A controller memory holds the desired angles for certain lines of defined elements and the actual measured angles for the desired lines or the differences between the desired angles and the corresp. measured angles. The measured angles can be corrected using the difference values. ADVANTAGE - X-ray spectrometer is simply adjustable and can make use of multiple collimators and analyser crystals.