Journal
NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT
Volume 497, Issue 2-3, Pages 563-568Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/S0168-9002(02)01797-7
Keywords
spatial screening; double crystal monochromators; large offset rotated-inclined double crystal monochromators; exit X-ray beam; SPring-8
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A 100 mm offset rotated-inclined double crystal monochromator has been installed at BL15XU in SPring-8. The spatial profiles of the exit X-ray beam by using Si(1 1 1) in inclined geometry was measured from 5 to 20 keV. The vertical deviation, due to refraction, between the first and the higher order was more than 0.7 mm. The large deviation enables to eliminate the higher-order reflections by spatial screening with horizontal blade slits. The intensity ratio of the higher-order reflection to the first order was less than 10(-5) over the whole energy range. (C) 2002 Elsevier Science B.V. All rights reserved.
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