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Proceedings Paper

CdTe focal plane detector for hard x-ray focusing optics
Author(s): Paul Seller; Matthew D. Wilson; Matthew C. Veale; Andreas Schneider; Jessica Gaskin; Colleen Wilson-Hodge; Steven Christe; Albert Y. Shih; Kyle Gregory; Andrew Inglis; Marco Panessa
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Paper Abstract

The demand for higher resolution x-ray optics (a few arcseconds or better) in the areas of astrophysics and solar science has, in turn, driven the development of complementary detectors. These detectors should have fine pixels, necessary to appropriately oversample the optics at a given focal length, and an energy response also matched to that of the optics. Rutherford Appleton Laboratory have developed a 3-side buttable, 20 mm x 20 mm CdTe-based detector with 250 μm square pixels (80x80 pixels) which achieves 1 keV FWHM @ 60 keV and gives full spectroscopy between 5 keV and 200 keV. An added advantage of these detectors is that they have a full-frame readout rate of 10 kHz. Working with NASA Goddard Space Flight Center and Marshall Space Flight Center, 4 of these 1mm-thick CdTe detectors are tiled into a 2x2 array for use at the focal plane of a balloon-borne hard-x-ray telescope, and a similar configuration could be suitable for astrophysics and solar space-based missions. This effort encompasses the fabrication and testing of flightsuitable front-end electronics and calibration of the assembled detector arrays. We explain the operation of the pixelated ASIC readout and measurements, front-end electronics development, preliminary X-ray imaging and spectral performance, and plans for full calibration of the detector assemblies. Work done in conjunction with the NASA Centers is funded through the NASA Science Mission Directorate Astrophysics Research and Analysis Program.

Paper Details

Date Published: 24 August 2015
PDF: 12 pages
Proc. SPIE 9601, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX, 960103 (24 August 2015); doi: 10.1117/12.2191617
Show Author Affiliations
Paul Seller, STFC Rutherford Appleton Lab. (United Kingdom)
Matthew D. Wilson, STFC Rutherford Appleton Lab. (United Kingdom)
Matthew C. Veale, STFC Rutherford Appleton Lab. (United Kingdom)
Andreas Schneider, STFC Rutherford Appleton Lab. (United Kingdom)
Jessica Gaskin, NASA Marshall Space Flight Ctr. (United States)
Colleen Wilson-Hodge, NASA Marshall Space Flight Ctr. (United States)
Steven Christe, NASA Goddard Space Flight Ctr. (United States)
Albert Y. Shih, NASA Goddard Space Flight Ctr. (United States)
Kyle Gregory, NASA Goddard Space Flight Ctr. (United States)
Andrew Inglis, NASA Goddard Space Flight Ctr. (United States)
The Catholic University of America (United States)
Marco Panessa, NASA Goddard Space Flight Ctr. (United States)
The Catholic University of America (United States)


Published in SPIE Proceedings Vol. 9601:
UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX
Oswald H. Siegmund, Editor(s)

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