Journal Article/Contribution to a conference proceedings

PUBDB-2025-03793

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png Annular x-ray optics offer improved resolution for radiation sensitive samples

Wittwer, F. (Corresponding author)DESY* ; Modregger, P.Extern*

2025
IOP Publ. Bristol

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Please use a persistent id in citations: doi:10.1088/1742-6596/3010/1/012073

Abstract: To detect faint signals from weakly scattering samples, high-resolution x-ray microscopy typically requires a high photon flux. This exposes samples to high radiation doses and can cause radiation damage. In this work we propose the use of annular optics in scanning microscopy as an alternative to full-aperture optics. Annular optics act as high-pass filters that produce a stronger signal from edges. Compared to regular optics with the same numerical aperture, annular optics expose the sample to less dose while producing the same signal from small sample features. Annular optics benefit significantly from the high photon fluxes of the latest x-ray sources to compensate for their overall smaller cross section. Using numerical simulations, we show that annular optics offer superior optical performance for sample features close to the resolution limit of the optic.

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Contributing Institute(s):

1. FS-PETRA (FS-PETRA)

Research Program(s):

1. 632 - Materials – Quantum, Complex and Functional Materials (POF4-632) (POF4-632)

Experiment(s):

1. No specific instrument

Appears in the scientific report 2025

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Database coverage:
; Nationallizenz ; SCOPUS

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