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Development of techniques for gantryless associated-particle imaging...

by Matthew R Heath, Jacob D Daughhetee, Paul A Hausladen, James T Matta, Robert J Newby
Publication Type
Conference Paper
Journal Name
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
Publication Date
Page Number
169220
Volume
1062
Conference Name
2023 Symposium on Radiation Measurements and Applications
Conference Location
Ann Arbor, Michigan, United States of America
Conference Sponsor
IEEE
Conference Date

To move fast-neutron radiography using the associated-particle imaging technique from the laboratory to the field, the development of new analysis techniques is required. In particular, the relative positions of the source and detectors need to be determined when they have been placed by hand, the normalization for a particular source–detector geometry needs to be determined without a measurement in the same geometry with no object present, and accurate image stitching is required when multiple detector positions are necessary to image an object. The present work describes methods that employ transmission neutron data to localize a fast-neutron imaging panel with respect to the neutron source, calculate a normalization for a given source–detector geometry, stitch images together, and describes the required system calibrations. The reported techniques enable in-field neutron radiography for cases in which the source–detector geometry is not well known a priori and where operational constraints preclude a normalization measurement.