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  Electrical characterization of prototype DEPFET detectors for Athena's Wide Field Imager

Bonholzer, M., Andritschke, R., Emberger, V., Meidinger, N., Müller-Seidlitz, J., & Treberspurg, W. (2019). Electrical characterization of prototype DEPFET detectors for Athena's Wide Field Imager. In O. H. W. Siegmund (Ed.), UV, X-RAY, AND GAMMA-RAY SPACE INSTRUMENTATION FOR ASTRONOMY XXI. doi:10.1117/12.2528403.

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Item Permalink: https://hdl.handle.net/21.11116/0000-0006-3E91-1 Version Permalink: https://hdl.handle.net/21.11116/0000-0006-3E92-0
Genre: Conference Paper

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 Creators:
Bonholzer, Michael1, Author           
Andritschke, Robert1, Author           
Emberger, Valentin1, Author           
Meidinger, Norbert1, Author           
Müller-Seidlitz, Johannes1, Author           
Treberspurg, Wolfgang1, Author           
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1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: The Wide Field Imager (WFI), one of two complementary instruments on board ESA's next large X-ray mission Athena, combines state-of-the-art resolution spectroscopy with a large field of view and high count rate capability. Centerpiece of the WFI instrument are four DEPFET (Depleted p-channel field effect transistor) sensors with a size of 512_512 pixels each and one fast detector with a size of 64_64 pixels. They are planned to be operated in drain current readout mode, which enables fast readout rates but is sensitive to inhomogeneities of the drain currents. These inhomogeneities arise from the sheer size of the DEPFET sensor matrix and are originated in the spatial distribution of wafer properties and process parameters. We characterized the drain current distribution of a prototype device (64_64 pixels) utilizing the same layout and technology as specified for the pre-flight production of Athena's WFI DEPFET detectors. In order to better understand the origin of the current spread we measured I-V characteristics of all pixels and extracted threshold voltages and transconductance values of the detector in operational conditions. This is enabled by features of the VERITAS read-out ASIC.

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 Dates: 2019-09-09
 Publication Status: Published online
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 Rev. Type: -
 Identifiers: DOI: 10.1117/12.2528403
Other: LOCALID: 3221045
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Title: Conference on UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XXI held at SPIE Optical Engineering + Applications Conference
Place of Event: San Diego, CA
Start-/End Date: 2019-08-11 - 2019-08-13

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Title: UV, X-RAY, AND GAMMA-RAY SPACE INSTRUMENTATION FOR ASTRONOMY XXI
Source Genre: Proceedings
 Creator(s):
Siegmund, Oswald H. W., Editor
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Pages: - Volume / Issue: 11118 Sequence Number: 111180F Start / End Page: - Identifier: -

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Title: Proceedings of SPIE
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Publ. Info: SPIE-INT SOC OPTICAL ENGINEERING
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: - Identifier: ISBN: 978-1-5106-2929-5
ISBN: 978-1-5106-2930-1
ISSN: 0277-786X