Zymaková Anna, Khakurel Krishna, Picchiotti Alessandra, Błachucki Wojciech, Szlachetko Jakub, Rebarz Mateusz, Uhlig Jens, Andreasson Jakob
RP4, ELI Beamlines, Za Radnici 835, Dolni Brezany 25241, Czech Republic.
Institute of Nuclear Physics, Polish Academy of Sciences, Radzikowskiego 152, Krakow 31342, Poland.
J Synchrotron Radiat. 2020 Nov 1;27(Pt 6):1730-1733. doi: 10.1107/S1600577520012217. Epub 2020 Oct 26.
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.
一种桌面式激光驱动水射流等离子体X射线源的新改进已在极端光基础设施（ELI）光束线用户设施成功实现并投入使用。为了保留用于光谱实验的源的宽带特性，最初选择了聚毛细管透镜作为聚焦元件。一般来说，聚毛细管X射线光学器件具有窄的光子接受角和小的视场，这使得对准变得复杂且耗时。本论文展示了一种用于将聚毛细管聚焦光学器件与宽带X射线对准的直接、可靠且可重复的方法。该方法包括一个预对准步骤，其中两个X射线狭缝正交安装在3D打印的圆柱形聚毛细管支架的相对两侧。这有助于精确确定X射线束的光轴。随后将聚毛细管安装在已移除狭缝的预对准支架中，使得X射线光子能够立即透过光学器件，为精细对准提供了一个良好的起点。
