Publication

Article Metrics

Citations


Online attention

Full-field spectroscopic measurement of the X-ray beam from a multilayer monochromator using a hyperspectral X-ray camera

DOI: 10.1107/S1600577519015212 DOI Help

Authors: Matthieu N Boone (Ghent University) , Frederic Van Assche (Ghent University) , Sander Vanheule (Ghent University) , Silvia Cipiccia (Diamond Light Source) , Hongchang Wang (Diamond Light Source) , Laszlo Vincze (Ghent University) , Luc Van Hoorebeke (Ghent University)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Journal Of Synchrotron Radiation , VOL 27

State: Published (Approved)
Published: December 2019
Diamond Proposal Number(s): 14696 , 19579 , 21682

Open Access Open Access

Abstract: Multilayer monochromator devices are commonly used at (imaging) beamlines of synchrotron facilities to shape the X-ray beam to relatively small bandwidth and high intensity. However, stripe artefacts are often observed and can deteriorate the image quality. Although the intensity distribution of these artefacts has been described in the literature, their spectral distribution is currently unknown. To assess the spatio-spectral properties of the monochromated X-ray beam, the direct beam has been measured for the first time using a hyperspectral X-ray detector. The results show a large number of spectral features with different spatial distributions for a [Ru, B4C] strip monochromator, associated primarily with the higher-order harmonics of the undulator and monochromator. It is found that their relative contributions are sufficiently low to avoid an influence on the imaging data. The [V, B4C] strip suppresses these high-order harmonics even more than the former, yet at the cost of reduced efficiency.

Journal Keywords: multilayer monochromator; stripe artefact; full-field spectroscopy; hyperspectral X-ray detector; SLcam

Subject Areas: Physics


Instruments: I13-2-Diamond Manchester Imaging

Added On: 12/12/2019 09:29

Documents:
pp5146.pdf

Discipline Tags:

Engineering & Technology Detectors Physics

Technical Tags:

Imaging Tomography