Direct LiF imaging diagnostics on refractive X-ray focusing at the EuXFEL High Energy Density instrument

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F23%3A00582700" target="_blank" >RIV/61389021:_____/23:00582700 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/68378271:_____/23:00568523

Výsledek na webu

<a href="https://scripts.iucr.org/cgi-bin/paper?S1600577522006245" target="_blank" >https://scripts.iucr.org/cgi-bin/paper?S1600577522006245</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1107/S1600577522006245" target="_blank" >10.1107/S1600577522006245</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Direct LiF imaging diagnostics on refractive X-ray focusing at the EuXFEL High Energy Density instrument

Popis výsledku v původním jazyce

The application of fluorescent crystal media in wide-range X-ray detectors provides an opportunity to directly image the spatial distribution of ultra-intense X-ray beams including investigation of the focal spot of free-electron lasers. Here the capabilities of the micro- and nano-focusing X-ray refractive optics available at the High Energy Density instrument of the European XFEL are reported, as measured in situ by means of a LiF fluorescent detector placed into and around the beam caustic. The intensity distribution of the beam focused down to several hundred nanometers was imaged at 9 keV photon energy. A deviation from the parabolic surface in a stack of nanofocusing Be compound refractive lenses (CRLs) was found to affect the resulting intensity distribution within the beam. Comparison of experimental patterns in the far field with patterns calculated for different CRL lens imperfections allowed the overall inhomogeneity in the CRL stack to be estimated. The precise determination of the focal spot size and shape on a sub-micrometer level is essential for a number of high energy density studies requiring either a pin-size backlighting spot or extreme intensities for X-ray heating.

Název v anglickém jazyce

Direct LiF imaging diagnostics on refractive X-ray focusing at the EuXFEL High Energy Density instrument

Popis výsledku anglicky

The application of fluorescent crystal media in wide-range X-ray detectors provides an opportunity to directly image the spatial distribution of ultra-intense X-ray beams including investigation of the focal spot of free-electron lasers. Here the capabilities of the micro- and nano-focusing X-ray refractive optics available at the High Energy Density instrument of the European XFEL are reported, as measured in situ by means of a LiF fluorescent detector placed into and around the beam caustic. The intensity distribution of the beam focused down to several hundred nanometers was imaged at 9 keV photon energy. A deviation from the parabolic surface in a stack of nanofocusing Be compound refractive lenses (CRLs) was found to affect the resulting intensity distribution within the beam. Comparison of experimental patterns in the far field with patterns calculated for different CRL lens imperfections allowed the overall inhomogeneity in the CRL stack to be estimated. The precise determination of the focal spot size and shape on a sub-micrometer level is essential for a number of high energy density studies requiring either a pin-size backlighting spot or extreme intensities for X-ray heating.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10306 - Optics (including laser optics and quantum optics)

Projekt

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

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

Journal of Synchrotron Radiation

ISSN

0909-0495

e-ISSN

1600-5775

Svazek periodika

30

Číslo periodika v rámci svazku

January

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

208-216

Kód UT WoS článku

000908417600019

EID výsledku v databázi Scopus

2-s2.0-85145536582