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

Abstract

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.

arXiv comment11 pages, 13 figures. Published in the Journal of Astronomical Telescopes, Instruments, and Systems

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Cited by in corpus (5)

• Overview of the High-Definition X-ray Imager instrument on the Lynx x-ray surveyor
• Improving the X-ray energy resolution of a scientific CMOS detector by pixel-level gain correction
• Initial Characterization of the First Speedster-EXD550 Event-Driven X-Ray Hybrid Complementary Metal-Oxide Semiconductor Detectors
• X-ray Performance of a Small Pixel Size sCMOS Sensor and the Effect of Depletion Depth
• Measuring the Quantum Efficiency of X-Ray Hybrid CMOS Detectors