Implementation of a crossed-slit system for fast alignment of sealed polycapillary X-ray optics.

Autor: Zymaková A; RP4, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic., Khakurel K Prasa; RP4, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic., Picchiotti A; RP4, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic., Błachucki W; Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, Krakow 31342, Poland., Szlachetko J; Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, Krakow 31342, Poland., Rebarz M; RP4, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic., Uhlig J; Division of Chemical Physics, Lund University, Box 117, Lund 22100, Sweden., Andreasson J; RP4, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic.
Jazyk: angličtina
Zdroj: Journal of synchrotron radiation [J Synchrotron Radiat] 2020 Nov 01; Vol. 27 (Pt 6), pp. 1730-1733. Date of Electronic Publication: 2020 Oct 26.
DOI: 10.1107/S1600577520012217
Abstrakt: A new modification of a table-top laser-driven water-jet plasma X-ray source has been successfully implemented and commissioned at the Extreme Light Infrastructure (ELI) Beamlines user facility. In order to preserve the broadband nature of the source for spectroscopic experiments, a polycapillary lens was initially chosen as the focusing element. Generally, polycapillary X-ray optics have a narrow photon acceptance angle and small field of view, making alignment complicated and time-consuming. This contribution demonstrates a straightforward, reliable and reproducible procedure for aligning polycapillary focusing optics with broadband X-rays. The method involves a pre-alignment step where two X-ray slits are mounted orthogonally on opposite sides of a 3D-printed cylindrical polycapillary holder. This helps to precisely determine the optical axis of the X-ray beam. Subsequent mounting of the polycapillary in the pre-aligned holder with the slits removed allowed for immediate transmission of the X-ray photons through the optics and has provided a good starting point for fine alignment.
(open access.)
Databáze: MEDLINE
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