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Proceedings Paper

Thermal neutron imaging using microchannel plates
Author(s): George W. Fraser; James F. Pearson; Okla S. Al-Horayess; W. Bruce Feller; Lee M. Cook
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Paper Abstract

Microchannel plates (MCPs) are compact electron multipliers of high gain, widely used for the high resolution imaging of charged particles and photons. In this paper, we consider the use of lead glass MCPs for the imaging of thermal neutrons. Two contrasting techniques are described. The first method involves direct neutron detection within a special channel plate structure containing lithium and/or boron. We review the constraints of glass chemistry on the attainable lithium oxide and boron oxide fractions and, hence, on the maximum neutron detection efficiency. The second method involves the detection, using MCPs of standard glass composition, of the internal conversion electrons from a thin gadolinium foil. We present the first measurements of the detection efficiency, pulse height resolution and imaging properties of a pulse-counting MCP/Gd detector system.

Paper Details

Date Published: 2 February 1993
PDF: 10 pages
Proc. SPIE 1737, Neutrons, X Rays, and Gamma Rays: Imaging Detectors, Material Characterization Techniques, and Applications, (2 February 1993); doi: 10.1117/12.138671
Show Author Affiliations
George W. Fraser, Univ. of Leicester (United Kingdom)
James F. Pearson, Univ. of Leicester (United Kingdom)
Okla S. Al-Horayess, Univ. of Leicester (United Kingdom)
W. Bruce Feller, Galileo Electro-Optics Corp. (United States)
Lee M. Cook, Galileo Electro-Optics Corp. (United States)

Published in SPIE Proceedings Vol. 1737:
Neutrons, X Rays, and Gamma Rays: Imaging Detectors, Material Characterization Techniques, and Applications
John M. Carpenter; David B. Cline; Richard C. Lanza; David F. R. Mildner, Editor(s)

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