2016
Towards high-flux X-ray beam compressing channel-cut monochromators
VEGSO, Karol, Matej JERGEL, Peter SIFFALOVIC, Eva MAJKOVA, Dusan KORYTAR et. al.Základní údaje
Originální název
Towards high-flux X-ray beam compressing channel-cut monochromators
Autoři
VEGSO, Karol (703 Slovensko), Matej JERGEL (703 Slovensko), Peter SIFFALOVIC (703 Slovensko), Eva MAJKOVA (703 Slovensko), Dusan KORYTAR (703 Slovensko), Zdenko ZAPRAZNY (703 Slovensko), Petr MIKULÍK (203 Česká republika, garant, domácí) a Patrik VAGOVIC (276 Německo)
Vydání
Journal of Applied Crystallography, Chester, INT UNION CRYSTALLOGRAPHY, 2016, 1600-5767
Další údaje
Jazyk
angličtina
Typ výsledku
Článek v odborném periodiku
Obor
10403 Physical chemistry
Stát vydavatele
Velká Británie a Severní Irsko
Utajení
není předmětem státního či obchodního tajemství
Odkazy
Impakt faktor
Impact factor: 2.614
Kód RIV
RIV/00216224:14740/16:00093863
Organizační jednotka
Středoevropský technologický institut
UT WoS
000391195900004
Klíčová slova anglicky
X-ray beam compressing channel-cut monochromators; single-point diamond technology; X-ray diffraction; small-angle X-ray scattering; grazing-incidence small-angle X-ray scattering; SAXS/GISAXS
Štítky
Změněno: 10. 3. 2017 08:50, Mgr. Eva Špillingová
Anotace
V originále
The issue of a high-flux X-ray beam compressing channel-cut monochromator for applications in X-ray metrology is addressed. A Ge(111) compressor with compression ratio 20.3 was designed on the principle of a combination of symmetric and highly asymmetric diffractions. A pilot application of the single-point diamond technology (SPDT) to finish active surfaces of X-ray optics was tested, providing 50% flux enhancement as compared to a Ge(220) counterpart prepared by traditional surface treatment. This is much more than the theoretical 22% forecast and shows the potential of SPDT for preparation of high-flux X-ray compressors with a high compression ratio, where highly asymmetric diffraction with a very low exit angle is inevitable. The implications for efficient collection of X-rays from microfocus X-ray sources are discussed. A comparison of Ge compressors with Ge parallel channel-cut monochromators combined with a 50 mm slit shows the several times higher flux of the former, making them applicable in X-ray diffraction experiments at medium resolution. Furthermore, the Ge(111) compressor was tested as a collimator in high-resolution grazing-incidence small-angle X-ray scattering (GISAXS) measurements of surface gratings, providing experimental resolution close to 400 nm. This is similar to 100 nm smaller than that achieved with the Ge(220) compressor but still approximately twice that of commercial SAXS/GISAXS laboratory setups.