A scintillating plastic fiber tracking detector for neutron and proton imaging and spectroscopy

Details A scintillating plastic fiber tracking detector for neutron and proton imaging and spectroscopy A scintillating plastic fiber tracking detector for neutron and proton imaging and spectroscopy

Feb 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999nimpa.422...49r&link_type=abstract

Nuclear Instruments and Methods in Physics Research Section A, Volume 422, Issue 1-3, p. 49-53.

Physics

3

Scientific paper

We report on a prototype detector system designed to perform imaging and spectroscopy on 20-250MeV neutrons. The detection techniques employed can be applied to measurements in a variety of disciplines including solar and atmospheric physics, radiation therapy and nuclear materials monitoring. The detector measures the energy and direction of neutrons by detecting double neutron-proton scatters and recording images of the ionization tracks of the recoil protons in a densely packed bundle of scintillating plastic fibers stacked in orthogonal layers. The scintillation tracks are detected and imaged by photomultipliers and image intensifier/CCD camera optics. By tracking the recoil protons from individual neutrons, the kinematics of the scatter are determined. This directional information results in a high signal-to-noise measurement. The self-triggering and track imaging features of a prototype for tracking in two dimensions are demonstrated in calibrations with 14-65MeV neutrons, 20-67.5MeV protons, and with cosmic-ray muons. Preliminary results of phantom imaging measurements using a proton beam are also presented. We discuss several applications for this detector technique and outline future development work.

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