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Proceedings Paper

Toward fast low-noise low-power digital CCDs for Lynx and other high-energy astrophysics missions
Author(s): M. Bautz; R. Foster; B. LaMarr; A. Malonis; G. Prigozhin; E. Miller; C. E. Grant; B. Burke; M. Cooper; D. Craig; C. Leitz; D. Schuette; V. Suntharalingam
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Paper Abstract

Future X-ray missions such as Lynx require large-format imaging detectors with performance at least as good as the best current-generation devices but with much higher readout rates. We are investigating a Digital CCD detector architecture, under development at MIT Lincoln Laboratory, for use in such missions. This architecture features a CMOS-compatible detector integrated with parallel CMOS signal processing chains. Fast, low-noise amplifiers and highly parallel signal processing provide the high frame-rates required. CMOS-compatibility of the CCD provides low-power charge transfer and signal processing. We report on the performance of CMOS-compatible test CCDs read at rates up to 5 Mpix s−1 (50 times faster than Chandra ACIS CCDs), with transfer clock swings as low as ±1.5 V (power/area < 10% of that of ACIS CCDs). We measure read noise below 6 electrons RMS at 2.5 MHz and X-ray spectral resolution better than 150 eV FWHM at 5.9 keV for single-pixel events. We discuss expected detector radiation tolerance at these relatively high transfer rates. We point out that the high pixel ’aspect ratio’ (depletion-depth : pixel size ≈ 9 : 1) of our test devices is similar to that expected for Lynx detectors, and illustrate some of the implications of this geometry for X-ray performance and noise requirements.

Paper Details

Date Published: 6 July 2018
PDF: 11 pages
Proc. SPIE 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray, 1069917 (6 July 2018); doi: 10.1117/12.2313594
Show Author Affiliations
M. Bautz, Massachusetts Institute of Technology (United States)
R. Foster, Massachusetts Institute of Technology (United States)
B. LaMarr, Massachusetts Institute of Technology (United States)
A. Malonis, Massachusetts Institute of Technology (United States)
G. Prigozhin, Massachusetts Institute of Technology (United States)
E. Miller, Massachusetts Institute of Technology (United States)
C. E. Grant, Massachusetts Institute of Technology (United States)
B. Burke, MIT Lincoln Lab. (United States)
M. Cooper, MIT Lincoln Lab. (United States)
D. Craig, MIT Lincoln Lab. (United States)
C. Leitz, MIT Lincoln Lab. (United States)
D. Schuette, MIT Lincoln Lab. (United States)
V. Suntharalingam, MIT Lincoln Lab. (United States)


Published in SPIE Proceedings Vol. 10699:
Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray
Jan-Willem A. den Herder; Shouleh Nikzad; Kazuhiro Nakazawa, Editor(s)

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