Soft x-rays with Orbital Angular Momentum for resonant scattering experiments at the SOLEIL synchrotron
Abstract
The paper presents a comprehensive description of a new setup implemented and commissioned at the SEXTANTS beamline of the SOLEIL synchrotron for absorption and scattering experiments with x-ray beams carrying an orbital angular momentum, also known as twisted x-ray beams. Two alternative methods have been implemented, based on the use of either spiral zone plates or fork gratings devices, and we show how they can be used for both defining and assessing the orbital angular momentum of an x-ray beam. We show also how multiple devices can be used in sequence to define an integer arithmetic of the orbital angular momentum of the final x-ray beam. Finally, we report the results of the first resonant scattering pilot experiments in transmission and reflection mode, intended to assess the feasibility of future users measurements. The availability of twisted soft x-rays complements the range of experimental techniques in elastic, resonant and coherent scattering available at the SEXTANTS beamline of the SOLEIL synchrotron.
Keywords
Cite
@article{arxiv.2512.24191,
title = {Soft x-rays with Orbital Angular Momentum for resonant scattering experiments at the SOLEIL synchrotron},
author = {Pietro Carrara and Franck Fortuna and Renaud Delaunay and Joan Vila-Comamala and Benedikt Rösner and Christian David and Stefania Pizzini and Clément Fourniols and Laurent Vila and Matteo Pancaldi and Carlo Spezzani and Flavio Capotondi and Pierre Nonnon and Mauro Fanciulli and Thierry Ruchon and Nicolas Jaouen and Horia Popescu and Maurizio Sacchi},
journal= {arXiv preprint arXiv:2512.24191},
year = {2026}
}
Comments
23 pages, 14 figures