Mirror to measure Small Angle X-ray Scattering signal in high energy density experiments


Mirror to measure Small Angle X-ray Scattering signal in high energy density experiments

Smid, M.; Bähtz, C.; Laso García, A.; Göde, S.; Grenzer, J.; Kluge, T.; Konôpková, Z.; Makita, M.; Pelka, A.; Prencipe, I.; Preston, T.; Rödel, M.; Cowan, T.

Small angle x-ray scattering (SAXS) is a well established technique to detect nanometer scale structure in matter. In typical setup, this diagnostics has an detector directly opened towards the scattering target. However, in a harsh environment of high intensity laser interaction, many high energetic particles and strong radiation are emerging from the laser target interaction. Such setup would therefore suffer a significant increase of noise due to this background which could eventually disable this measurement. In this paper, we present a novel tool consisting of mosaic graphite crystal which works as a mirror for the SAXS signal and allows to hide the detector behind proper shielding. This paper studies the performance of such mirror both by experiment at the European XFEL laboratory and by simulations.

Keywords: HAPG crystal; SAXS; XFEL; Bragg reflection; x-ray diagnostics

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Permalink: https://www.hzdr.de/publications/Publ-30891
Publ.-Id: 30891