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Proceedings Paper

APD-based x-ray imaging telescope using Fresnel zone plates for extremely high spatial resolution
Author(s): Michael R. Squillante; Richard A. Myers; Mitchell Woodring; James F. Christian; Frank Robertson; Richard Farrell; Alexander I. Kogan; Timothy C. Tiernan; Gerald Entine
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Paper Abstract

A method for constructing an x-ray telescope with exceedingly hgh spatial resolution is to use a pair of coaxial, Fresnel zone plates aligned with an imaging x-ray detector. This combination allows the high sensitivity imaging of x-ray and gamma-ray sources ranging in energy from 1 keV to several hundred keV over a field of view of several degrees with spatial resolution of a fraction of an arc minute. We have implemented a version of such a telescope using several relatively new technologies. These include specialized techniques for constructing Fresnel zone plates from thin sheets of tungsten, a 64-element, avalanche photodiode (APD) array coupled to a matching, segmented, CsI(T1) scintillator, a new ASIC which provides 16-channels of low noise amplification, and image processing software that provides the user not only with localized intensity information, but also with localized spectral information.

Paper Details

Date Published: 21 September 2005
PDF: 8 pages
Proc. SPIE 5923, Penetrating Radiation Systems and Applications VII, 59230Q (21 September 2005); doi: 10.1117/12.618452
Show Author Affiliations
Michael R. Squillante, Radiation Monitoring Devices (United States)
Richard A. Myers, Radiation Monitoring Devices (United States)
Mitchell Woodring, Pacific Northwest National Lab. (United States)
James F. Christian, Radiation Monitoring Devices (United States)
Frank Robertson, Radiation Monitoring Devices (United States)
Richard Farrell, Radiation Monitoring Devices (United States)
Alexander I. Kogan, Radiation Monitoring Devices (United States)
Timothy C. Tiernan, Radiation Monitoring Devices (United States)
Gerald Entine, Radiation Monitoring Devices (United States)

Published in SPIE Proceedings Vol. 5923:
Penetrating Radiation Systems and Applications VII
F. Patrick Doty; H. Bradford Barber; Hans Roehrig, Editor(s)

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