Measuring the quantum efficiency of X-ray hybrid CMOS detectors

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

doi:10.1117/12.2594040

Cited by 2 publications

(2 citation statements)

References 17 publications

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“…We also corrected for attenuation due to the ice layer, in a similar manner to the correction described in §4. 4.…”

Section: Rotation Measurementmentioning

confidence: 99%

Measuring the Soft X-Ray Quantum Efficiency of a Hybrid CMOS Detector

Colosimo,

Falcone,

Wages

et al. 2022

Preprint

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Next-generation X-ray observatories, such as the Lynx X-ray Observatory Mission Concept or other similar concepts in the coming decade, will require detectors with high quantum efficiency (QE) across the soft Xray band to observe the faint objects that drive their mission science objectives. Hybrid CMOS Detectors (HCDs), a form of active-pixel sensor, are promising candidates for use on these missions because of their fast read-out, low power consumption, and intrinsic radiation hardness. In this work, we present QE measurements of a Teledyne H2RG HCD, performed using a gas-flow proportional counter as a reference detector. We find that this detector achieves high QE across the soft X-ray band, with an effective QE of 94.6 ± 1.1% at the Mn Kα/Kβ energies (5.90/6.49 keV), 98.3 ± 1.9% at the Al Kα energy (1.49 keV), 85.6 ± 2.8% at the O Kα energy (0.52 keV), and 61.3 ± 1.1% at the C Kα energy (0.28 keV). These values are in good agreement with our model, based on the absorption of detector layers. We find similar results in a more restrictive analysis considering only high-quality events, with only somewhat reduced QE at lower energies.

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“…We also corrected for attenuation due to the ice layer, in a similar manner to the correction described in §4. 4.…”

Section: Rotation Measurementmentioning

confidence: 99%

Measuring the Soft X-Ray Quantum Efficiency of a Hybrid CMOS Detector

Colosimo,

Falcone,

Wages

et al. 2022

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

“…In particular, we report on the QE of this H2RG HCD at the Mn Kα∕Kβ (5.90/ 6.49 keV), Al Kα (1.49 keV), O Kα (0.52 keV), and C Kα (0.28 keV) characteristic x-ray emission lines. Much of this work was presented at the 2021 SPIE Optics and Photonics meeting and is adapted from the corresponding proceedings, 4 with further expansions relative to that work.…”

Section: Introductionmentioning

confidence: 99%

Measuring the soft x-ray quantum efficiency of a hybrid CMOS detector

Colosimo

Falcone

Wages

et al. 2022

J. Astron. Telesc. Instrum. Syst.

Self Cite

View full text Add to dashboard Cite

Next-generation x-ray observatories, such as the Lynx X-ray Observatory Mission Concept or other similar concepts in the coming decade, will require detectors with high quantum efficiency (QE) across the soft x-ray band to observe the faint objects that drive their mission science objectives. Hybrid CMOS detectors (HCDs), a form of active-pixel sensor, are promising candidates for use on these missions because of their fast read-out, low power consumption, and intrinsic radiation hardness. We present QE measurements of a Teledyne H2RG HCD, performed using a gas-flow proportional counter as a reference detector. We find that this detector achieves high QE across the soft x-ray band, with an effective QE of 94.6 AE 1.1% at the Mn Kα∕Kβ energies (5.90/6.49 keV), 98.3 AE 1.9% at the Al Kα energy (1.49 keV), 85.6 AE 2.8% at the O Kα energy (0.52 keV), and 61.3 AE 1.1% at the C Kα energy (0.28 keV). These values are in good agreement with our model, based on the absorption of detector layers. We find similar results in a more restrictive analysis considering only high-quality events, with only somewhat reduced QE at lower energies.

show abstract

Measuring the quantum efficiency of X-ray hybrid CMOS detectors

Cited by 2 publications

References 17 publications

Measuring the Soft X-Ray Quantum Efficiency of a Hybrid CMOS Detector

Measuring the Soft X-Ray Quantum Efficiency of a Hybrid CMOS Detector

Measuring the soft x-ray quantum efficiency of a hybrid CMOS detector

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