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Proceedings Paper

Advances in microchannel plates and photocathodes for ultraviolet photon counting detectors
Author(s): O. H. W. Siegmund; K. Fujiwara; R. Hemphill; S. R. Jelinsky; J. B. McPhate; A. S. Tremsin; J. V. Vallerga; H. J. Frisch; J. Elam; A. Mane; D. C. Bennis; C. A. Craven; M. A. Deterando; J. R. Escolas; M. J. Minot; J. M. Renaud
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Paper Abstract

A new method of fabricating microchannel plates has been investigated, employing microcapillary arrays of borosilicate glass that are deposited with resistive and secondary emissive layers using atomic layer deposition. Microchannel plates of this kind have been made in sizes from 33 mm to 200 mm, with pore sizes of 40 μm and 20 μm, pore length to diameter ratios of 60:1, bias angles of 8°, and open areas from 60% to 83%. Tests with single MCPs and MCP pairs have been done and show good imaging quality, gain comparable to conventional MCPs, low background rates (~ 0.085 events sec-1 cm-2), fast pulse response, and good ageing characteristics. The quantum efficiency for bare and alkali halide coated MCPs is similar to conventional MCPs, and we have also been able to deposit opaque GaN(Mg) cathodes directly onto these MCPs.

Paper Details

Date Published: 14 September 2011
PDF: 12 pages
Proc. SPIE 8145, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII, 81450J (14 September 2011); doi: 10.1117/12.894374
Show Author Affiliations
O. H. W. Siegmund, Univ. of California, Berkeley (United States)
K. Fujiwara, Univ. of California, Berkeley (United States)
R. Hemphill, Univ. of California, Berkeley (United States)
S. R. Jelinsky, Univ. of California, Berkeley (United States)
J. B. McPhate, Univ. of California, Berkeley (United States)
A. S. Tremsin, Univ. of California, Berkeley (United States)
J. V. Vallerga, Univ. of California, Berkeley (United States)
H. J. Frisch, The Univ. of Chicago (United States)
J. Elam, Argonne National Lab. (United States)
A. Mane, Argonne National Lab. (United States)
D. C. Bennis, Incom Inc. (United States)
C. A. Craven, Incom Inc. (United States)
M. A. Deterando, Incom Inc. (United States)
J. R. Escolas, Incom Inc. (United States)
M. J. Minot, Incom Inc. (United States)
J. M. Renaud, Incom Inc. (United States)


Published in SPIE Proceedings Vol. 8145:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XVII
Oswald H. Siegmund, Editor(s)

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