Measuring the quantum efficiency of X-ray hybrid CMOS detectors

Joseph M. Colosimo; Abraham D. Falcone; Mitchell Wages; Samuel V. Hull; David N. Burrows; Mitchell Range; Fredric Hancock; Cole R. Armstrong; Gooderham McCormick; Daniel M. LaRocca

doi:10.1117/12.2594040

24 August 2021 Measuring the quantum efficiency of X-ray hybrid CMOS detectors

Joseph M. Colosimo, Abraham D. Falcone, Mitchell Wages, Samuel V. Hull, David N. Burrows, Mitchell Range, Fredric Hancock, Cole R. Armstrong, Gooderham McCormick, Daniel M. LaRocca

Author Affiliations +

Proceedings Volume 11821, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXII; 118210T (2021) https://doi.org/10.1117/12.2594040
Event: SPIE Optical Engineering + Applications, 2021, San Diego, California, United States

Abstract

Next-generation X-ray observatories, such as the Lynx X-ray Observatory Mission Concept, will require detectors with high quantum efficiency (QE) across the soft X-ray band to observe the faint objects that drive their mission science cases. Hybrid CMOS Detectors (HCDs), a form of active-pixel sensor, are promising candidates for use on these missions because of their faster read-out, lower power consumption, and greater radiation hardness than detectors used in the current generation of X-ray telescopes. In this work, we present QE measurements of a Teledyne H2RG HCD. These measurements were performed using a gas-flow proportional counter as a reference detector to measure the absolute flux incident on the HCD. We find an effective QE of 95:0 ± 1:1% at the Mn ∝/Kβ lines (at 5.9 and 6.5 keV), 98:5 ± 1:8% at the Al Ka line (1.5 keV), and 85:0 ± 2:8% at the O K∝ line (0.52 keV).

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Joseph M. Colosimo, Abraham D. Falcone, Mitchell Wages, Samuel V. Hull, David N. Burrows, Mitchell Range, Fredric Hancock, Cole R. Armstrong, Gooderham McCormick, and Daniel M. LaRocca "Measuring the quantum efficiency of X-ray hybrid CMOS detectors", Proc. SPIE 11821, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXII, 118210T (24 August 2021); https://doi.org/10.1117/12.2594040

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