High Resolution Imaging X-Ray Detector For Astronomical Measurements

J. P. Henry; E. M. Kellogg; U. G. Briel; S. S. Murray; L. P. Van Speybroeck; P. J. Bjorkholm

doi:10.1117/12.955472

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29 August 1977 High Resolution Imaging X-Ray Detector For Astronomical Measurements

J. P. Henry, E. M. Kellogg, U. G. Briel, S. S. Murray, L. P. Van Speybroeck, P. J. Bjorkholm

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Proceedings Volume 0106, X-Ray Imaging; (1977) https://doi.org/10.1117/12.955472
Event: 1977 SPIE/SPSE Technical Symposium East, 1977, Reston, United States

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.

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J. P. Henry, E. M. Kellogg, U. G. Briel, S. S. Murray, L. P. Van Speybroeck, and P. J. Bjorkholm "High Resolution Imaging X-Ray Detector For Astronomical Measurements", Proc. SPIE 0106, X-Ray Imaging, (29 August 1977); https://doi.org/10.1117/12.955472

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