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Proceedings Paper

X-ray focusing with 11-um square-pore microchannel plates
Author(s): Adam N. Brunton; George W. Fraser; John Ernest Lees; W. Bruce Feller; Paul L. White
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Paper Abstract

Focused x-ray images are reported for 21 X 21mm2 microchannel plate (MCP) optics having an eleven micron square-channel geometry. These are the smallest channel size square-pore MCPs yet evaluated. Because the limiting focal spot size in such optics is twice the channel width, their construction represents a significant advance towards focusing elements capable of very high intensification. The MCPs were fabricated with channel length- to-diameter ratios of 40 to 1 and 75 to 1; with an open area fraction of 85%. X-ray images were first obtained at 0.28keV and 1.74keV using a planar MCP geometry with a zero degree bias angle. These images indicate that subtle deviations from an ideal square channel geometry (i.e. vertex 'radiusing') can strongly influence the focal spot structure. Finally, one of the MCPs was spherically 'slumped' to a 1m radius and remeasured in x-rays, demonstrating for the first time the operation of a slumped square-channel MCP.

Paper Details

Date Published: 15 June 1995
PDF: 10 pages
Proc. SPIE 2519, X-Ray and Ultraviolet Sensors and Applications, (15 June 1995); doi: 10.1117/12.211913
Show Author Affiliations
Adam N. Brunton, Univ. of Leicester (United Kingdom)
George W. Fraser, Univ. of Leicester (United Kingdom)
John Ernest Lees, Univ. of Leicester (United Kingdom)
W. Bruce Feller, NOVA Scientific, Inc. (United States)
Paul L. White, NOVA Scientific, Inc. (United States)

Published in SPIE Proceedings Vol. 2519:
X-Ray and Ultraviolet Sensors and Applications
Richard B. Hoover; Mark Bennett Williams, Editor(s)

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