Exploring fine subpixel spatial resolution of hybrid CMOS detectors

Evan Bray; Abraham Falcone; Samuel V. Hull; David N Burrows

doi:10.1117/12.2312846

6 July 2018 Exploring fine subpixel spatial resolution of hybrid CMOS detectors

Evan Bray, Abraham Falcone, Samuel V. Hull, David N Burrows

Proceedings Volume 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray; 106995Q (2018) https://doi.org/10.1117/12.2312846
Event: SPIE Astronomical Telescopes + Instrumentation, 2018, Austin, Texas, United States

Abstract

When an X-ray is incident onto the silicon absorber array of a detector, it liberates a large number of electrons, which tend to diffuse outward into what is referred to as the charge cloud. This number can vary from tens to thousands across the soft X-ray bandpass (0.1 - 10 keV). The charge cloud can then be picked up by several pixels, and forms a specific pattern based on the exact incident location of the X-ray. We present experimental results on subpixel resolution for a custom H2RG with 36μm pixels, presented in Bray 2018,¹ and compare the data to simulated images . We then apply the model simulation to a prototype small pixel hybrid CMOS detector (HCD) that would be suitable for the Lynx X-ray surveyor. We also discuss the ability of a small pixel detector to obtain subpixel resolution.

Citation Download Citation

Evan Bray, Abraham Falcone, Samuel V. Hull, and David N Burrows "Exploring fine subpixel spatial resolution of hybrid CMOS detectors", Proc. SPIE 10699, Space Telescopes and Instrumentation 2018: Ultraviolet to Gamma Ray, 106995Q (6 July 2018); https://doi.org/10.1117/12.2312846

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