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Optical Engineering

Spatial resolution and relative brightness of a microchannel plate detector system with P20 and P43 phosphor screens
Author(s): Johnny G. Aase; Johnathan K. Burchill; David Knudsen; John P. Hackett; Brian Moffat
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Paper Abstract

A detector consisting of two biased microchannel plates and a P20 or P43 phosphor screen was illuminated with 500-eV electrons in order to characterize the size and amplitude of individual microchannel plate (MCP) firings as a function of phosphor-to-MCP distance d and voltage Vacc. The P43 phosphor was significantly brighter (71%) than P20 at Vacc = 4250 V, and brighter but less so (4%) at Vacc = 8000 V. Events were Gaussian-shaped with full widths at half maximum of order 0.27 mm for Vacc = 4250 V and d = 2 mm. Widths decreased by 23% to 28% when Vacc was increased to 8000 V, and increased between 9 to 34% when doubling d, depending on Vacc and phosphor type.

Paper Details

Date Published: 1 June 2011
PDF: 7 pages
Opt. Eng. 50(6) 064001 doi: 10.1117/1.3582857
Published in: Optical Engineering Volume 50, Issue 6
Show Author Affiliations
Johnny G. Aase, Univ. of Calgary (Canada)
Johnathan K. Burchill, Univ. of Calgary (Canada)
David Knudsen, Univ. of Calgary (Canada)
John P. Hackett, COM DEV International Ltd. (Canada)
Brian Moffat, COM DEV International Ltd. (Canada)


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