Micro-channel plate (MCP) detectors, when used at pulsed-neutron-source instruments, offer the possibility of high spatial resolution and high contrast imaging with pixel-level spectroscopic information. Here we demonstrate the possibility of multimodal analysis including total neutron cross-section spectra measurements, quantitative material differentiation imaging and texture-sensitive in-line phase imaging, from a single exposure using an MCP detector. This multimodal approach operates in full-field imaging mode, with the neutron transmission spectra acquired at each individual detector pixel. Due to the polychromatic nature of the beam and spectroscopic resolving capability of the detector, no energy scanning is required. Good agreement with the library reference data is demonstrated for neutron cross-section spectra measurements. Two different images corresponding to two selected energy bandwidths are used for elemental differentiation imaging. Moreover, the presence of changes in texture, i.e., preferred grain orientation, in the sample is identified from our phase-retrieval imaging results.
@article{arxiv.2311.16159,
title = {Single-exposure elemental differentiation and texture-sensitive phase-retrieval imaging with a neutron counting micro-channel plate detector},
author = {Benedicta D. Arhatari and David M. Paganin and Henry Kirkwood and Anton S. Tremsin and Timur E. Gureyev and Alexander M. Korsunsky and Winfried Kockelmann and Felix Hofmann and Eric Huwald and Shu-Yan Zhang and Joe Kelleher and Brian Abbey},
journal= {arXiv preprint arXiv:2311.16159},
year = {2024}
}
Comments
Revised manuscript resubmitted to Physical Review A