Hybrid CMOS detectors for the Lynx X-ray surveyor high definition X-ray imager

Samuel V. Hull, Abraham D. Falcone, Evan Bray, Mitchell Wages, Maria Mcquaide, David N. Burrows

Research output: Contribution to journalArticlepeer-review

15 Scopus citations


X-ray hybrid CMOS detectors (HCDs) are a promising candidate for future X-ray missions requiring high throughput and fine angular resolution along with large field-of-view, such as the high-definition X-ray imager (HDXI) instrument on the Lynx X-ray surveyor mission concept. These devices offer fast readout capability, low power consumption, and radiation hardness while maintaining high detection efficiency from 0.2 to 10 keV. In addition, X-ray hybrid CMOS sensors may be fabricated with small pixel sizes to accommodate high-resolution optics and have shown great improvements in recent years in noise and spectral resolution performance. In particular, 12.5-μm pitch prototype devices that include in-pixel correlated double sampling capability and crosstalk eliminating capacitive transimpedance amplifiers, have been fabricated and tested. These detectors have achieved read noise as low as 5.4 e-, and we measure the best energy resolution to be 148 eV (2.5%) at 5.9 keV and 78 eV (14.9%) at 0.53 keV. We will describe the characterization of these prototype small-pixel X-ray HCDs, and we will discuss their applicability to the HDXI instrument on Lynx.

Original languageEnglish (US)
Article number021018
JournalJournal of Astronomical Telescopes, Instruments, and Systems
Issue number2
StatePublished - Apr 1 2019

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Control and Systems Engineering
  • Instrumentation
  • Astronomy and Astrophysics
  • Mechanical Engineering
  • Space and Planetary Science


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