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, Jacob C. Buffington, David Nelson Burrows, Zachary E. Catlin, Hannah M. Grzybowski, Fredric Hancock, Evan C. Jennerjahn, Jordan Josties, Collin S. Reichard, Ana C. Scigliani, Ian Thornton

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Scopus citations

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 SpeedsterEXD550 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.

Original languageEnglish (US)
Title of host publicationUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII
EditorsOswald H. Siegmund, Keri Hoadley
PublisherSPIE
ISBN (Electronic)9781510665705
DOIs
StatePublished - 2023
EventUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII 2023 - San Diego, United States
Duration: Aug 20 2023Aug 22 2023

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume12678
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X

Conference

ConferenceUV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXIII 2023
Country/TerritoryUnited States
CitySan Diego
Period8/20/238/22/23

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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