Highly efficient angularly resolving x-ray spectrometer optimized for absorption measurements with collimated sources

0478371 - FZÚ 2018 RIV US eng J - Článek v odborném periodiku
Šmíd, Michal - Gonzalez, I.G. - Ekerfelt, H. - Svensson, J.B. - Hansson, M. - Wood, I. C. - Persson, A. - Mangles, S.P.D. - Lundh, O. - Falk, Kateřina
Highly efficient angularly resolving x-ray spectrometer optimized for absorption measurements with collimated sources.
Review of Scientific Instruments. Roč. 88, č. 6 (2017), s. 1-8, č. článku 063102. ISSN 0034-6748. E-ISSN 1089-7623
Grant CEP: GA MŠMT EF15_008/0000162; GA MŠMT LQ1606
GRANT EU: European Commission(XE) 654148 - LASERLAB-EUROPE
Grant ostatní: ELI Beamlines(XE) CZ.02.1.01/0.0/0.0/15_008/0000162
Institucionální podpora: RVO:68378271
Klíčová slova: acceleration * measurments * x ray * high energy
Obor OECD: Fluids and plasma physics (including surface physics)
Impakt faktor: 1.428, rok: 2017

Highly collimated betatron radiation from a laser wakefield accelerator is a promising tool for spectroscopic measurements. Therefore, there is a requirement to create spectrometers suited to the unique properties of such a source. We demonstrate a spectrometer which achieves an energy resolution of < 5 eV at 9 keV (E/Delta E > 1800) and is angularly resolving the x-ray emission allowing the reference and spectrum to be recorded at the same time. The single photon analysis is used to significantly reduce the background noise. Theoretical performance of various configurations of the spectrometer is calculated by a ray-tracing algorithm. The properties and performance of the spectrometer including the angular and spectral resolution are demonstrated experimentally on absorption above the K-edge of a Cu foil backlit by a laser-produced betatron radiation x-ray beam. Published by AIP Publishing.
Trvalý link: http://hdl.handle.net/11104/0274472