On the Edge Refraction Contrast Imaging on a Conventional Neutron Diffractometer Employing Dispersive Double-Crystal Monochromator

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389005%3A_____%2F16%3A00471159" target="_blank" >RIV/61389005:_____/16:00471159 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1742-6596/746/1/012028" target="_blank" >http://dx.doi.org/10.1088/1742-6596/746/1/012028</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/746/1/012028" target="_blank" >10.1088/1742-6596/746/1/012028</a>

Jazyk výsledku

angličtina

Název v původním jazyce

On the Edge Refraction Contrast Imaging on a Conventional Neutron Diffractometer Employing Dispersive Double-Crystal Monochromator

Popis výsledku v původním jazyce

Conventional radiography is based on absorption effects, which depend only on the imaginary part of the refractive index. However, slits and macroscopic objects such as edges give rise to refraction and this phenomenon can be effectively used in the so called phase- contrast imaging. In addition to the absorption contrast in the conventional radiography, it exploits also contributions of phase shifts induced by the propagation of a coherent neutron (or X-ray) beam through an investigated sample. The difference in real part of the refrative index between a studied detail and its vicinity results in a phase shift between the wave transmitted through and outside the detail. Due to this phase shift, the two waves interfere. However, the used radiation has to possess a sufficiently high spatial coherence permitting one to detect resulting interference pattern. In this contribution we present two simple neutron diffractometer configurations based on two bent perfect Si crystals which provide a high spatial coherence beam of sufficient intensity which could be potentially used in some phase contrast radiography experiments.

Název v anglickém jazyce

On the Edge Refraction Contrast Imaging on a Conventional Neutron Diffractometer Employing Dispersive Double-Crystal Monochromator

Popis výsledku anglicky

Conventional radiography is based on absorption effects, which depend only on the imaginary part of the refractive index. However, slits and macroscopic objects such as edges give rise to refraction and this phenomenon can be effectively used in the so called phase- contrast imaging. In addition to the absorption contrast in the conventional radiography, it exploits also contributions of phase shifts induced by the propagation of a coherent neutron (or X-ray) beam through an investigated sample. The difference in real part of the refrative index between a studied detail and its vicinity results in a phase shift between the wave transmitted through and outside the detail. Due to this phase shift, the two waves interfere. However, the used radiation has to possess a sufficiently high spatial coherence permitting one to detect resulting interference pattern. In this contribution we present two simple neutron diffractometer configurations based on two bent perfect Si crystals which provide a high spatial coherence beam of sufficient intensity which could be potentially used in some phase contrast radiography experiments.

Druh

D - Stať ve sborníku

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

journal of physics: Conference series

ISBN

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ISSN

1742-6588

e-ISSN

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Počet stran výsledku

7

Strana od-do

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Název nakladatele

IOP Publishing Ltd.

Místo vydání

Bristol

Místo konání akce

Zaragoza

Datum konání akce

30. 8. 2016

Typ akce podle státní příslušnosti

EUR - Evropská akce

Kód UT WoS článku

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