29 August 2017 Studies of prototype DEPFET sensors for the Wide Field Imager of Athena
Author Affiliations +
Abstract
The Wide Field Imager (WFI) of ESA’s next X-ray observatory Athena will combine a high count rate capability with a large field of view, both with state-of-the-art spectroscopic performance. To meet these demands, specific DEPFET active pixel detectors have been developed and operated. Due to the intrinsic amplification of detected signals they are best suited to achieve a high speed and low noise performance. Different fabrication technologies and transistor geometries have been implemented on a dedicated prototype production in the course of the development of the DEPFET sensors. The main modifications between the sensors concern the shape of the transistor gate – regarding the layout – and the thickness of the gate oxide – regarding the technology. To facilitate the fabrication and testing of the resulting variety of sensors the presented studies were carried out with 64×64 pixel detectors. The detector comprises a control ASIC (Switcher-A), a readout ASIC (VERITAS- 2) and the sensor. In this paper we give an overview on the evaluation of different prototype sensors. The most important results, which have been decisive for the identification of the optimal fabrication technology and transistor layout for subsequent sensor productions are summarized. It will be shown that the developments result in an excellent performance of spectroscopic X-ray DEPFETs with typical noise values below 2.5 ENC at 2.5 μs/row.
Conference Presentation
© (2017) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Wolfgang Treberspurg, Wolfgang Treberspurg, Robert Andritschke, Robert Andritschke, Alexander Bähr, Alexander Bähr, Annika Behrens, Annika Behrens, Günter Hauser, Günter Hauser, Peter Lechner, Peter Lechner, Norbert Meidinger, Norbert Meidinger, Johannes Müller-Seidlitz, Johannes Müller-Seidlitz, Johannes Treis, Johannes Treis, } "Studies of prototype DEPFET sensors for the Wide Field Imager of Athena", Proc. SPIE 10397, UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XX, 103970U (29 August 2017); doi: 10.1117/12.2274032; https://doi.org/10.1117/12.2274032
PROCEEDINGS
10 PAGES + PRESENTATION

SHARE
RELATED CONTENT

The Wide Field Imager instrument for Athena
Proceedings of SPIE (August 29 2017)
Imaging spectrometers for future x-ray missions
Proceedings of SPIE (January 25 2002)
The wide field imager for IXO status and future...
Proceedings of SPIE (July 29 2010)
Silicon x-ray array detector on spectrum-x-gamma satellite
Proceedings of SPIE (October 01 1991)
Test setup for DEPMOSFET matrices for XEUS
Proceedings of SPIE (June 15 2006)
Two-dimensional active pixel InGaAs focal plane arrays
Proceedings of SPIE (May 15 2001)

Back to Top