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  Spectroscopic performance of flight-like DEPFET sensors for Athena's WFI

Müller-Seidlitz, J., Andritschke, R., Bonholzer, M., Emberger, V., Hauser, G., Herrmann, M., et al. (2022). Spectroscopic performance of flight-like DEPFET sensors for Athena's WFI. In Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray. doi:10.1117/12.2629474.

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 Creators:
Müller-Seidlitz, J.1, Author           
Andritschke, R.1, Author           
Bonholzer, M.1, Author           
Emberger, V.1, Author           
Hauser, G.1, Author           
Herrmann, M.1, Author           
Lechner, P., Author
Mayr, A.1, Author           
Oser, J.1, Author           
Affiliations:
1High Energy Astrophysics, MPI for Extraterrestrial Physics, Max Planck Society, ou_159890              

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 Abstract: The wide field imager for the Athena x-ray telescope is composed of two back side illuminated detectors using DEPFET sensors operated in rolling shutter readout mode: a large detector array featuring four sensors with 512×512 pixels each and a small detector that facilitates the high count rate capability of the WFI for the investigation of bright, point-like sources. Both sensors were fabricated in full size featuring the pixel layout, fabrication technology and readout mode chosen in a preceding prototyping phase. We present the spectroscopic performance of these flight-like detectors for different photon energies in the relevant part of the targeted energy range from 0.2 keV to 15 keV with respect to the timing requirements of the instrument. For 5.9 keV photons generated by an 55Fe source the spectral performance expressed as full width at half maximum of the emission peak in the spectrum is 126.0 eV for the large detector and 129.1 eV for the fast detector. A preliminary analysis of the camera’s signal chain also allows for a first prediction of the performance in space at the end of the nominal operation phase.

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Language(s): eng - English
 Dates: 2022-08-31
 Publication Status: Published online
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 Identifiers: DOI: 10.1117/12.2629474
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Title: SPIE Astronomical Telescopes + Instrumentation,
Place of Event: Montréal, Québec, Canada
Start-/End Date: 2022-07-17 - 2022-07-23

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Title: Space Telescopes and Instrumentation 2022: Ultraviolet to Gamma Ray
Source Genre: Proceedings
 Creator(s):
Nakazawa, Kazuhiro, Author
Nikzad, Shouleh , Author
A. den Herder, Jan-Willem , Author
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Pages: - Volume / Issue: 12181 Sequence Number: - Start / End Page: - Identifier: -

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Title: Proceedings of SPIE
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Publ. Info: Bellingham, WA, USA : Society of Photo-Optical Instrumentation Engineers
Pages: - Volume / Issue: - Sequence Number: 121813W Start / End Page: - Identifier: ISSN: 0277-786X