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Proceedings Paper

UV imaging detectors with high performance microchannel plates
Author(s): O. H. W. Siegmund; J. V. Vallerga; N. Darling; T. Curtis; J. McPhate; J. S. Hull; T. Cremer; C. Ertley; M. Foley; M. Minot; G. Graves; C. Paw U; C. Vo
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Paper Abstract

We present recent progress in the development of novel microchannel plates (MCPs) manufactured using standard lead glass and with borosilicate glass microcapillary arrays functionalized using Atomic Layer Deposition (ALD) technology. Standard glass MCPs have achieved high quantum efficiency (~60% @115 nm & 65 nm) using opaque alkali halide photocathodes. Enhanced performance standard glass MCPs have also been demonstrated with no fixed pattern noise due to construction defects. Novel borosilicate glass atomic layer deposited MCPs up to 20 cm format show good overall response uniformity, tight pulse height distributions and very low background levels (0.05 events cm-2). Spatial resolutions of the order of 20 μm are demonstrated with 10 μm pore atomic layer deposited MCPs, and their fixed pattern noise has been significantly reduced. Bialkali cathodes in sealed tubes show high (<30%) efficiency at ~200 nm and long wavelength cutoffs at ~360 nm have been engineered.

Paper Details

Date Published: 9 September 2019
PDF: 12 pages
Proc. SPIE 11118, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI, 111180N (9 September 2019); doi: 10.1117/12.2529897
Show Author Affiliations
O. H. W. Siegmund, Space Sciences Lab. (United States)
J. V. Vallerga, Space Sciences Lab. (United States)
N. Darling, Space Sciences Lab. (United States)
T. Curtis, Space Sciences Lab. (United States)
J. McPhate, Space Sciences Lab. (United States)
J. S. Hull, Space Sciences Lab. (United States)
T. Cremer, Incom, Inc. (United States)
C. Ertley, Incom, Inc. (United States)
M. Foley, Incom, Inc. (United States)
M. Minot, Incom, Inc. (United States)
G. Graves, Space Sciences Lab. (United States)
C. Paw U, Space Sciences Lab. (United States)
C. Vo, Space Sciences Lab. (United States)

Published in SPIE Proceedings Vol. 11118:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI
Oswald H. Siegmund, Editor(s)

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