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000827388 1001_ $$0P:(DE-Juel1)159450$$aJafari, A.$$b0$$ufzj
000827388 245__ $$aRocking curve imaging of high quality sapphire crystals in backscattering geometry
000827388 260__ $$aMelville, NY$$bAmerican Inst. of Physics$$c2017
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000827388 520__ $$aWe report on the characterization of high quality sapphire single crystals suitable for high-resolution X-ray optics at high energy. Investigations using rocking curve imaging reveal the crystals to be of uniformly good quality at the level of ∼10−4 in lattice parameter variations, δd/d. However, investigations using backscattering rocking curve imaging with a lattice spacing resolution of δd/d∼5×10−8 show very diverse quality maps for all crystals. Our results highlight nearly ideal areas with an edge length of 0.2–0.5 mm in most crystals, but a comparison of the back reflection peak positions shows that even neighboring ideal areas exhibit a relative difference in the lattice parameters on the order of δd/d=10–20×10−8; this is several times larger than the rocking curve width. Stress-strain analysis suggests that an extremely stringent limit on the strain at a level of ∼100 kPa in the growth process is required in order to produce crystals with large areas of the quality required for X-ray optics at high energy.
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000827388 7001_ $$0P:(DE-HGF)0$$aSergueev, I.$$b1
000827388 7001_ $$0P:(DE-HGF)0$$aBessas, D.$$b2
000827388 7001_ $$0P:(DE-HGF)0$$aRoschin, B. S.$$b3
000827388 7001_ $$0P:(DE-HGF)0$$aAsadchikov, V. E.$$b4
000827388 7001_ $$0P:(DE-Juel1)157748$$aAlexeev, P.$$b5
000827388 7001_ $$00000-0002-0504-3937$$aHärtwig, J.$$b6
000827388 7001_ $$0P:(DE-HGF)0$$aChumakov, A. I.$$b7
000827388 7001_ $$0P:(DE-HGF)0$$aWille, H.-C.$$b8
000827388 7001_ $$0P:(DE-Juel1)130706$$aHermann, Raphael$$b9$$eCorresponding author$$ufzj
000827388 7001_ $$0P:(DE-Juel1)144500$$aKlobes, Benedikt$$b10
000827388 773__ $$0PERI:(DE-600)1476463-5$$a10.1063/1.4974106$$gVol. 121, no. 4, p. 044901 -$$n4$$p044901 $$tJournal of applied physics$$v121$$x1089-7550$$y2017
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