A neutron imaging detector based on neutron-sensitive microchannel plates (MCPs) was constructed and tested at beamlines of thermal and cold neutrons. The MCPs are made of a glass mixture containing B-10 and natural Gd, which makes the bulk of the MCP an efficient neutron converter. Contrary to the neutron sensitive scintillator screens normally used in neutron imaging, spatial resolution is not traded off with detection efficiency. While the best neutron imaging scintillators have a detection efficiency around a percent, a detection efficiency of around 50% for thermal neutrons and 70% for cold neutrons has been demonstrated with these MCPs earlier. Our tests show a performance similar to conventional neutron imaging detectors, apart from the orders of magnitude better sensitivity. We demonstrate a spatial resolution better than 150 um. The sensitivity of this detector allows fast tomography and neutron video recording, and will make smaller reactor sites and even portable sources suitable for neutron imaging.
@article{arxiv.1710.02614,
title = {Neutron imaging and tomography with MCPs},
author = {Serge Duarte Pinto and Raquel Ortega and Steve Ritzau and David Pasquale and Bruce Laprade and Sharon Mrotek and Sean Gardell and Zhou Zhou and Jeroen Plomp and Lambert van Eijck and Hassina Bilheux and Indu Dhiman},
journal= {arXiv preprint arXiv:1710.02614},
year = {2017}
}
Comments
Submitted to the proceedings of the 19th International Workshop on Radiation Imaging Detectors (iWoRiD) 2-6 July 2017, Krakow, Poland