Patent ID: 7535992
Filing Date: 2009-05-19
Classification: G01N

Abstract:
1. An X-ray diffraction apparatus comprising: (a) an X-ray tube including an anode having a first target region made of a first material and a second target region made of a second material which is different from the first material, wherein the first target region and the second target region are sectioned in a Z-direction perpendicular to an X-ray take-off direction; (b) a sample holder for holding a sample so as to be simultaneously irradiated with a first characteristic X-ray emitted from the first target region and a second characteristic X-ray emitted from the second target region; (c) an incident-side Z-direction-divergence restriction device which is arranged between the X-ray tube and the sample to restrict X-ray divergence in the Z-direction; (d) an X-ray detector for detecting a diffracted X-ray coming from the sample, wherein the X-ray detector is position sensitive at least in the Z-direction and detects separately a diffracted X-ray coming from a first region of the sample which is irradiated with the first characteristic X-ray and another diffracted X-ray coming from a second region of the sample which is irradiated with the second characteristic X-ray; and (e) a receiving-side Z-direction-divergence restriction device which is arranged between the sample and the X-ray detector to restrict X-ray divergence in the Z-direction.