Status of testing and characterization of the Speedster-EXD550 x-ray hybrid CMOS detector

Lukas R. Stone; Abraham D. Falcone; Joseph M. Colosimo; Timothy Emeigh; Mitchell Wages; William A. Bevidas Jr.; Jacob C. Buffington; David N. Burrows; Zachary E. Catlin; Hannah M. Grzybowski; Fredric Hancock; Evan C. Jennerjahn; Jordan Josties; Collin S. Reichard; Ana C. Scigliani; Ian Thornton

doi:10.1117/12.2676983

5 October 2023 Status of testing and characterization of the Speedster-EXD550 x-ray hybrid CMOS detector

Lukas R. Stone, Abraham D. Falcone, Joseph M. Colosimo, Timothy Emeigh, Mitchell Wages, William A. Bevidas Jr., Jacob C. Buffington, David N. Burrows, Zachary E. Catlin, Hannah M. Grzybowski, Fredric Hancock, Evan C. Jennerjahn, Jordan Josties, Collin S. Reichard, Ana C. Scigliani, Ian Thornton

Author Affiliations +

Proceedings Volume 12678, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII; 126780O (2023) https://doi.org/10.1117/12.2676983
Event: SPIE Optical Engineering + Applications, 2023, San Diego, California, United States

Abstract

The novel Speedster-EXD550 is a 550×550-pixel x-ray Hybrid CMOS Detector (HCD) with event-driven readout capabilities and 40-micron pixel pitch. In event-driven readout mode, only the pixels that contain sufficient liberated charge from the absorption of an x-ray will be read out. Event-driven readout allows for even faster readout speed than other HCDs, reaching readout speeds up to 10,000 frames/sec. The high frame rate of the Speedster-EXD550 is desirable for future missions as the effects of dark current and x-ray pile-up will be reduced. The readout circuitry within the ROIC for the Speedster-EXD550 contains a high-gain capacitive transimpedance amplifier, in-pixel correlated double sampling, and an in-pixel comparator enabling event-driven readout. The Speedster-EXD550 also utilizes column-parallel on-chip digitization. The ability of the Speedster-EXD550 will be demonstrated on BlackCAT, a funded NASA CubeSat mission. Testing and characterization of the Speedster-EXD550 has been done by the Penn State High Energy Astrophysics Detector and Instrumentation lab in both full-frame and event-driven readout modes. A radioactive 55Fe source was used for the measurements presented. Here, we discuss the methods and recent results for the characterization of the Speedster-EXD550 dark current, read noise, gain, and gain variation.

Conference Presentation

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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Lukas R. Stone, Abraham D. Falcone, Joseph M. Colosimo, Timothy Emeigh, Mitchell Wages, William A. Bevidas Jr., Jacob C. Buffington, David N. Burrows, Zachary E. Catlin, Hannah M. Grzybowski, Fredric Hancock, Evan C. Jennerjahn, Jordan Josties, Collin S. Reichard, Ana C. Scigliani, and Ian Thornton "Status of testing and characterization of the Speedster-EXD550 x-ray hybrid CMOS detector", Proc. SPIE 12678, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII, 126780O (5 October 2023); https://doi.org/10.1117/12.2676983

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