Implementation of a crossed-slit system for fast alignment of sealed polycapillary X-ray optics
| Autor: | Jakob Andreasson, Krishna P. Khakurel, Alessandra Picchiotti, Jakub Szlachetko, Wojciech Błachucki, Jens Uhlig, Anna Zymaková, Mateusz Rebarz |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Nuclear and High Energy Physics
Photon Extreme Light Infrastructure Astrophysics::High Energy Astrophysical Phenomena Short Communications X-ray optics Physics::Optics 02 engineering and technology X-ray sources 01 natural sciences law.invention Optics law 0103 physical sciences Broadband 010306 general physics Instrumentation Physics Radiation business.industry X-ray slits alignment 021001 nanoscience & nanotechnology Lens (optics) Optical axis X-ray focusing optics Acceptance angle polycapillaries 0210 nano-technology business Beam (structure) |
| Zdroj: | Journal of Synchrotron Radiation |
| ISSN: | 1600-5775 |
| Popis: | A fast X-ray focusing polycapillary alignment method was implemented and tested using a compact short-pulse laser-driven broadband X-ray source. 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. |
| Databáze: | OpenAIRE |
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