A high-throughput assembly of beam-shaping channel-cut monochromators for laboratory high-resolution X-ray distraction and small-angle X-ray scattering experiments
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F21%3A00121925" target="_blank" >RIV/00216224:14310/21:00121925 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1107/S1600576721002338" target="_blank" >https://doi.org/10.1107/S1600576721002338</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1107/S1600576721002338" target="_blank" >10.1107/S1600576721002338</a>
Alternative languages
Result language
angličtina
Original language name
A high-throughput assembly of beam-shaping channel-cut monochromators for laboratory high-resolution X-ray distraction and small-angle X-ray scattering experiments
Original language description
A four-bounce monochromator assembly composed of Ge(111) and Ge(220) monolithic channel-cut monochromators with V-shaped channels in a quasidispersive configuration is presented. The assembly provides an optimal design in terms of the highest transmittance and photon flux density per detector pixel while maintaining high beam collimation. A monochromator assembly optimized for the highest recorded intensity per detector pixel of a linear detector placed 2.5 m behind the assembly was realized and tested by high-resolution X-ray diffraction and small-angle X-ray scattering measurements using a microfocus X-ray source. Conventional symmetric and asymmetric Ge(220) Bartels monochromators were similarly tested and the results were compared. The new assembly provides a transmittance that is an order of magnitude higher and 2.5 times higher than those provided by the symmetric and asymmetric Bartels monochromators, respectively, while the output beam divergence is twice that of the asymmetric Bartels monochromator. These results demonstrate the advantage of the proposed monochromator assembly in cases where the resolution can be partially sacrificed in favour of higher transmittance while still maintaining high beam collimation. Weakly scattering samples such as nanostructures are an example. A general advantage of the new monochromator is a significant reduction in the exposure time required to collect usable experimental data. A comparison of the theoretical and experimental results also reveals the current limitations of the technology of polishing hard-to-reach surfaces in X-ray crystal optics.
Czech name
—
Czech description
—
Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10302 - Condensed matter physics (including formerly solid state physics, supercond.)
Result continuities
Project
—
Continuities
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of Applied Crystallography
ISSN
0021-8898
e-ISSN
1600-5767
Volume of the periodical
54
Issue of the periodical within the volume
June
Country of publishing house
GB - UNITED KINGDOM
Number of pages
9
Pages from-to
730-738
UT code for WoS article
000659339200002
EID of the result in the Scopus database
2-s2.0-85110925700