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Statements

Subject Item
n2:RIV%2F61389005%3A_____%2F14%3A00433182%21RIV15-GA0-61389005
rdf:type
skos:Concept n15:Vysledek
dcterms:description
After preliminary results obtained and published recently ill, in our contribution focusing and reflectivity properties of the dispersive double bent-crystal arrangement are presented in much more detail. It has been found that two different bent perfect crystals in (+n,-m) setting can be good candidates for high efficiency neutron microfocusing as well as high-resolution monochromatisation. Due to the (+n,-m) setting of two different bent perfect crystals, a high resolution is expected in both Delta(2 theta) (2 theta is the scattering angle) as well as Delta lambda/lambda (lambda is the neutron wavelength). Experimental tests were carried out with the setting employing the bent Si(111) slab and Si(220)-sandwich, which contained either one, or two or four 1.3 mm thin simply stacked slabs. Thanks to a high reflection probability of both bent elements and an easy manipulation with the curvature of the Si(220)-sandwich, an excellently focused intensive monochromatic beam of the width from one to several millimetres was obtained. The properties of the double bent-crystal setting were studied in Rez at the neutron optics diffractometer for the neutron wavelength of 0.162 nm and for various thicknesses and curvatures of the Si(220)-sandwich. It has been also found that besides an excellent focusing and reflectivity properties of the dispersive double bent-crystal setting the obtained monochromatic neutron current is sufficiently high for standard high-resolution diffraction experiments even at the medium power research reactor. After preliminary results obtained and published recently ill, in our contribution focusing and reflectivity properties of the dispersive double bent-crystal arrangement are presented in much more detail. It has been found that two different bent perfect crystals in (+n,-m) setting can be good candidates for high efficiency neutron microfocusing as well as high-resolution monochromatisation. Due to the (+n,-m) setting of two different bent perfect crystals, a high resolution is expected in both Delta(2 theta) (2 theta is the scattering angle) as well as Delta lambda/lambda (lambda is the neutron wavelength). Experimental tests were carried out with the setting employing the bent Si(111) slab and Si(220)-sandwich, which contained either one, or two or four 1.3 mm thin simply stacked slabs. Thanks to a high reflection probability of both bent elements and an easy manipulation with the curvature of the Si(220)-sandwich, an excellently focused intensive monochromatic beam of the width from one to several millimetres was obtained. The properties of the double bent-crystal setting were studied in Rez at the neutron optics diffractometer for the neutron wavelength of 0.162 nm and for various thicknesses and curvatures of the Si(220)-sandwich. It has been also found that besides an excellent focusing and reflectivity properties of the dispersive double bent-crystal setting the obtained monochromatic neutron current is sufficiently high for standard high-resolution diffraction experiments even at the medium power research reactor.
dcterms:title
Focusing and reflectivity properties of a parallel double bent crystal ( plus n,-m) setting Focusing and reflectivity properties of a parallel double bent crystal ( plus n,-m) setting
skos:prefLabel
Focusing and reflectivity properties of a parallel double bent crystal ( plus n,-m) setting Focusing and reflectivity properties of a parallel double bent crystal ( plus n,-m) setting
skos:notation
RIV/61389005:_____/14:00433182!RIV15-GA0-61389005
n3:aktivita
n4:P n4:I
n3:aktivity
I, P(GB14-36566G), P(LM2010011), P(LM2011019)
n3:dodaniDat
n8:2015
n3:domaciTvurceVysledku
n17:4302885 n17:7126441 n17:5098203 n17:7740077
n3:druhVysledku
n13:D
n3:duvernostUdaju
n19:S
n3:entitaPredkladatele
n12:predkladatel
n3:idSjednocenehoVysledku
17140
n3:idVysledku
RIV/61389005:_____/14:00433182
n3:jazykVysledku
n5:eng
n3:klicovaSlova
double bent crystal; diffrraction; monochromator
n3:klicoveSlovo
n11:diffrraction n11:double%20bent%20crystal n11:monochromator
n3:kontrolniKodProRIV
[BDDAAD19F862]
n3:mistoKonaniAkce
Munich
n3:mistoVydani
Bristol
n3:nazevZdroje
Journal of Physics Conference Series
n3:obor
n14:BM
n3:pocetDomacichTvurcuVysledku
4
n3:pocetTvurcuVysledku
7
n3:projekt
n6:LM2011019 n6:GB14-36566G n6:LM2010011
n3:rokUplatneniVysledku
n8:2014
n3:tvurceVysledku
Woo, C. Pilch, Jan Šaroun, Jan Seong, B. S. Em, V. Vrána, Miroslav Mikula, Pavol
n3:typAkce
n20:WRD
n3:wos
000340245000003
n3:zahajeniAkce
2013-07-02+02:00
s:issn
1742-6588
s:numberOfPages
8
n7:doi
10.1088/1742-6596/528/1/012003
n16:hasPublisher
IOP Publishing Ltd