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000206992 0247_ $$2doi$$a10.1117/12.2061127
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000206992 041__ $$aEnglish
000206992 1001_ $$0P:(DE-H253)PIP1017853$$aRoth, Thomas$$b0$$eCorresponding author
000206992 1112_ $$aSPIE Optical Engineering + Applications$$cSan Diego$$d2014-08-17 - 2014-08-17$$wCalifornia
000206992 245__ $$aX-ray Laminography and SAXS on Beryllium Grades and Lenses and Wavefront Propagation through Imperfect Compound Refractive Lenses
000206992 260__ $$c2014
000206992 29510 $$aProc. SPIE 9207, Advances in X-Ray/EUV Optics and Components IX
000206992 300__ $$a12
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000206992 3367_ $$2BibTeX$$aINPROCEEDINGS
000206992 4900_ $$aAdvances in X-Ray/EUV Optics and Components IX
000206992 520__ $$aHard X-ray free electron lasers provide almost fully transverse coherent X-rays. Though the natural divergence of these X-rays is a few micro-radians, they still need to be collimated or focused while traveling up to 1km towards the sample. This can be done with beryllium compound refractive lenses (CRLs). Due to the coherence of the beam, it is important that the impurities or granular boundaries in these CRLs do not distort the wavefront of the X-ray beam to a measurable extend. We measured the SAXS signal of various beryllium grades and of 2D parabolic lenses made of IF-1 beryllium. Then, we imaged these samples using X-ray computed laminography at a resolution of around 1 micrometer. Computed laminography is a 3D imaging technique similar to computed tomography, but particularly adapted for at extended objects. These measurements are used to characterize the voids and granular boundaries in the beryllium samples. Boundaries between the former powder particles are easily seen for beryllium grades produced via powder metallurgy methods. This is not the case for cast ingots. Common to all samples are voids with diameters in the 10 micrometer range as well as smaller sized, denser impurities. Finally, we use wavefront propagation simulations in order to analyze the effect of voids in the CRLs on the wavefront of the XFEL beam. If the distance "lens to focus and sample" is large enough, the diffraction patterns emerging from the voids smoothen out
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000206992 588__ $$aDataset connected to CrossRef Conference
000206992 693__ $$0EXP:(DE-H253)XFEL(machine)-20150101$$1EXP:(DE-H253)XFEL-20150101$$5EXP:(DE-H253)XFEL(machine)-20150101$$aXFEL$$eFacility (machine) XFEL$$x0
000206992 693__ $$0EXP:(DE-H253)XFEL-MID-20150101$$1EXP:(DE-H253)XFEL-20150101$$5EXP:(DE-H253)XFEL-MID-20150101$$6EXP:(DE-H253)XFEL-SASE2-20150101$$aXFEL$$eMID: Materials Imaging and Dynamics$$fSASE2$$x1
000206992 7001_ $$0P:(DE-HGF)0$$aHelfen, Lukas$$b1
000206992 7001_ $$0P:(DE-H253)PIP1008000$$aHallmann, Joerg$$b2
000206992 7001_ $$0P:(DE-H253)PIP1006674$$aSamoylova, Liubov$$b3
000206992 7001_ $$0P:(DE-HGF)0$$aKwaśniewski, Paweł$$b4
000206992 7001_ $$0P:(DE-HGF)0$$aLengeler, Bruno$$b5
000206992 7001_ $$0P:(DE-H253)PIP1013485$$aMadsen, Anders$$b6
000206992 7001_ $$0P:(DE-HGF)0$$aMorawe, Christian$$b7$$eEditor
000206992 7001_ $$0P:(DE-HGF)0$$aGoto, Shunji$$b8$$eEditor
000206992 7001_ $$0P:(DE-HGF)0$$aKhounsary, Ali M.$$b9$$eEditor
000206992 773__ $$a10.1117/12.2061127$$p920702-1 -- 920702-12$$v9207
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000206992 9131_ $$0G:(DE-HGF)POF2-54G17$$1G:(DE-HGF)POF2-540$$2G:(DE-HGF)POF2-500$$9G:(DE-H253)POF2-XFEL-20130405$$aDE-H253$$bStruktur der Materie$$lForschung mit Photonen, Neutronen und Ionen (PNI)$$vDESY-participation in XFEL$$x0
000206992 9101_ $$0I:(DE-588b)16047298-2$$6P:(DE-H253)PIP1017853$$aThe European X-Ray Laser Project XFEL$$b0$$kXFEL
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000206992 9101_ $$0I:(DE-HGF)0$$6P:(DE-HGF)0$$aKarlsruher Institut für Technologie$$b1
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