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

Research output: Contribution to journalArticle

Abstract

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.

Details

Authors
Organisations
External organisations
  • Imperial College London
  • Institute of Physics of the Czech Academy of Sciences, ASCR
Research areas and keywords

Subject classification (UKÄ) – MANDATORY

  • Atom and Molecular Physics and Optics
Original languageEnglish
Article number063102
JournalReview of Scientific Instruments
Volume88
Issue number6
Publication statusPublished - 2017 Jun 1
Publication categoryResearch
Peer-reviewedYes

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