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9 September 2019 Small-pixel x-ray hybrid CMOS detectors: a candidate for the high-definition x-ray imager on Lynx
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Abstract
The High Definition X-ray Imager (HDXI) is one of three planned instruments for the next generation Lynx mission concept and would provide fine spatial resolution X-ray imaging and moderate spectral resolution over a wide field-of-view. The instrument is baselined to rapidly read out large silicon focal plane arrays consisting of small pixels. We present the most recent results from small-pixel X-ray hybrid CMOS detectors that are designed to meet these needs. These devices implement crosstalk-eliminating capacitive transimpedance amplifiers as well the ability to perform in-pixel correlated double sampling, and have achieved noise and spectral resolution approaching the notional requirements of Lynx-HDXI. Read noise as low as 5.4 e- (RMS) has been measured, along with energy resolution (FWHM) as good as 158 eV at 5.9 keV, 78 eV at 0.52 keV, and 71 eV at 0.28 keV.
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Samuel V. Hull, Abraham D. Falcone, Mitchell Wages, and David N. Burrows "Small-pixel x-ray hybrid CMOS detectors: a candidate for the high-definition x-ray imager on Lynx", Proc. SPIE 11118, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI, 111180G (9 September 2019); https://doi.org/10.1117/12.2528537
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