Diffractive-refractive optics: low-aberration Bragg-case focusing by precise parabolic surfaces

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F10%3A00043185" target="_blank" >RIV/00216224:14310/10:00043185 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/10:00341601

Result on the web

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DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Diffractive-refractive optics: low-aberration Bragg-case focusing by precise parabolic surfaces

Original language description

Based on analytical formulae calculations and ray-tracing simulations a low-aberration focal spot with a high demagnification ratio was predicted for a diffractive-refractive crystal optics device with parabolic surfaces. Two Si(111) crystals with two precise parabolic-shaped grooves have been prepared and arranged in a dispersive position (+,-,-,+) with high asymmetry. Experimental testing of the device at beamline BM05 at the ESRF provided a focal spot size of 38.25 um at a focal distance of 1.4 m for7.31 keV. This is the first experiment with a parabolic-shaped groove; all previous experiments were performed with circular grooves which introduced extreme aberration broadening of the focal spot. The calculated and simulated focal size was 10.8 um ata distance of 1.1 m at 7.31 keV. It is assumed that the difference between the measured and calculated/simulated focal spot size and focal distance is due to insufficient surface quality and to alignment imperfection.

Czech name

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Czech description

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Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

BM - Solid-state physics and magnetism

OECD FORD branch

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Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

Z - Vyzkumny zamer (s odkazem do CEZ)

Publication year

2010

Confidentiality

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

Name of the periodical

Journal of Synchrotron Radiation

ISSN

0909-0495

e-ISSN

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Volume of the periodical

17

Issue of the periodical within the volume

1

Country of publishing house

US - UNITED STATES

Number of pages

5

Pages from-to

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UT code for WoS article

000272990700004

EID of the result in the Scopus database

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