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.

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

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