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Bimodal imaging at ICON using neutrons and X-rays

Title data

Kaestner, Anders ; Hovind, J. ; Boillat, P. ; Muehlebach, C. ; Carminati, C. ; Zarebanadkouki, Mohsen ; Lehmann, Eberhard H.:
Bimodal imaging at ICON using neutrons and X-rays.
In: Physics Procedia. Vol. 88 (2017) . - pp. 314-321.
ISSN 1875-3892
DOI: https://doi.org/10.1016/j.phpro.2017.06.043

Abstract in another language

For experiments with low contrast between the relevant features it can be beneficial to add a second modality to reduce ambiguity. At Paul Scherrer Institut the two neutron imaging facilities NEUTRA (thermal neutrons) and ICON (cold neutrons) we have installed X-ray beamlines for on-site bimodal imaging with neutrons and X-rays. This allows us to leave the sample untouched in the sample environment throughout an experiment and to reduce the waiting times between acquisitions using each modality. The applications and energy ranges of the X-ray installations are different at the two facilities. At NEUTRA larger samples are intended (60-320 kV) and at ICON small samples and simultaneous acquisition are intended (40-150 kV). Here, we report the more recent installation at ICON. The X-ray beamline uses a cone beam source and is arranged across the neutron beamline. The beamline is designed to allow up to ten times magnification. This matches the voxel-size that can be achieved with the micro-setup for neutrons. The oblique arrangement of the X-ray beamline further makes real-time acquisition possible since both modalities have a free view of the sample at any time. Reconstruction of cone beam data requires more knowledge about the beam geometry and sample position. Therefore, the beamline is equipped with laser based distance sensors and a calibration procedure has been developed to increase the accuracy of the reconstruction. The purpose of using multimodal acquisition is to fuse the data in a way that enhances the output of the experiment. We demonstrate the current system performance and provide a basic analysis with experiment data.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER150084
Institutions of the University: Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: No
DDC Subjects: 500 Science
Date Deposited: 08 Apr 2019 11:48
Last Modified: 05 May 2020 08:33
URI: https://eref.uni-bayreuth.de/id/eprint/48312