About: Potential use of V-channel Ge(220) monochromators in X-ray metrology and imaging

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About: Potential use of V-channel Ge(220) monochromators in X-ray metrology and imaging Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	While channel-cut crystals, in which the diffracting surfaces in an asymmetric cut are kept parallel, can provide beam collimation and spectral beam shaping, they can in addition provide beam compression or expansion if the cut is V-shaped. The compression/expansion ratio depends in this case on the total asymmetry factor. If the Ge(220) diffraction planes and a total asymmetry factor in excess of 10 are used, the rocking curves of two diffractors will have a sufficient overlap only if the second diffractor is tuned slightly with respect to the first one. This study compares and analyses several ways of overcoming this mismatch, which is due to refraction, when the Cu K1 beam is compressed 21-fold in a V21 monochromator. A more than sixfold intensity increase was obtained if the matching was improved either by a compositional variation or by a thermal deformation. This provided an intensity gain compared with the use of a simple slit in a symmetrical channel-cut monochromator. While channel-cut crystals, in which the diffracting surfaces in an asymmetric cut are kept parallel, can provide beam collimation and spectral beam shaping, they can in addition provide beam compression or expansion if the cut is V-shaped. The compression/expansion ratio depends in this case on the total asymmetry factor. If the Ge(220) diffraction planes and a total asymmetry factor in excess of 10 are used, the rocking curves of two diffractors will have a sufficient overlap only if the second diffractor is tuned slightly with respect to the first one. This study compares and analyses several ways of overcoming this mismatch, which is due to refraction, when the Cu K1 beam is compressed 21-fold in a V21 monochromator. A more than sixfold intensity increase was obtained if the matching was improved either by a compositional variation or by a thermal deformation. This provided an intensity gain compared with the use of a simple slit in a symmetrical channel-cut monochromator. (en)
Title	Potential use of V-channel Ge(220) monochromators in X-ray metrology and imaging Potential use of V-channel Ge(220) monochromators in X-ray metrology and imaging (en)
skos:prefLabel	Potential use of V-channel Ge(220) monochromators in X-ray metrology and imaging Potential use of V-channel Ge(220) monochromators in X-ray metrology and imaging (en)
skos:notation	RIV/00216224:14740/13:00069091!RIV14-MSM-14740___
http://linked.open...avai/riv/aktivita	P
http://linked.open...avai/riv/aktivity	P(ED1.1.00/02.0068)
http://linked.open...iv/cisloPeriodika	4
http://linked.open...vai/riv/dodaniDat	2014
http://linked.open...aciTvurceVysledku	Mikulík, Petr
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Masarykova univerzita / Středoevropský technologický institut
http://linked.open...dnocenehoVysledku	97846
http://linked.open...ai/riv/idVysledku	RIV/00216224:14740/13:00069091
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	x-ray optics; monochromators; imaging (en)
http://linked.open.../riv/klicoveSlovo	monochromators x-ray optics imaging
http://linked.open...odStatuVydavatele	US - Spojené státy americké
http://linked.open...ontrolniKodProRIV	[BA6E338294A4]
http://linked.open...i/riv/nazevZdroje	Journal of Applied Crystallography
http://linked.open...in/vavai/riv/obor	BM
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	15 (xsd:int)
http://linked.open...vavai/riv/projekt	Central european institute of technology
http://linked.open...UplatneniVysledku	2013
http://linked.open...v/svazekPeriodika	46
http://linked.open...iv/tvurceVysledku	Fiederle, M. Baumbach, T. Cecilia, A. Ferrari, C. Hamann, E. Korytár, D. Mikulík, Petr Vagovič, P. Dobročka, E. Jark, W. Jergel, M. Végsö, K. Zápražný, Z. Áč, V. Šiffalovič, P.
http://linked.open...ain/vavai/riv/wos	000322032300019
issn	0021-8898
number of pages	8 (xsd:int)
http://bibframe.org/vocab/doi	10.1107/S0021889813006122
http://localhost/t...ganizacniJednotka	14740

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