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Proceedings Paper

High Resolution Imaging X-Ray Detector For Astronomical Measurements
Author(s): J. P. Henry; E. M. Kellogg; U. G. Briel; S. S. Murray; L. P. Van Speybroeck; P. J. Bjorkholm
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Paper Abstract

We describe the X-ray detector which will provide second-of-arc images for the HEAO-B X-ray observatory. The instrument uses microchannel plates as a photocathode surface and imaging photoelectron multiplier, and a crossed wire grid as a two-dimensional position-sensitive detector. Position determination is accomplished by electronic interpolation between the coarse grid wires. The detector provides the arrival time and position of each event which occurs with-in its field of view. We describe our measurements of the spatial resolution (15µm), temporal resolution (7.811s), image distortion (<10µm), uniformity of efficiency (< +10%), dark counting rate (0.2 cts cm-2 s-1), and quantum efficiency (10% at 1.54 key) of this detector. We also give a summary of the procedure which we have found useful during the initial turn-on of microchannel plates.

Paper Details

Date Published: 29 August 1977
PDF: 10 pages
Proc. SPIE 0106, X-Ray Imaging, (29 August 1977); doi: 10.1117/12.955472
Show Author Affiliations
J. P. Henry, Harvard College Observatory (United States)
E. M. Kellogg, Harvard College Observatory (United States)
U. G. Briel, Harvard College Observatory (United States)
S. S. Murray, Harvard College Observatory (United States)
L. P. Van Speybroeck, Harvard College Observatory (United States)
P. J. Bjorkholm, American Science and Engineering, Inc. (United States)

Published in SPIE Proceedings Vol. 0106:
X-Ray Imaging
Richard P. Chase; Glenn W. Kuswa, Editor(s)

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