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  1. OA@INAF
  2. PRODOTTI RICERCA INAF
  3. 3 CONTRIBUTI IN ATTI DI CONVEGNO (Proceedings)
  4. 3.01 Contributi in Atti di convegno
Please use this identifier to cite or link to this item: http://hdl.handle.net/20.500.12386/27895
Title: Development of the wide field imager for Athena
Authors: Meidinger, Norbert
Eder, Josef
Fürmetz, Maria
Nandra, Kirpal
Pietschner, Daniel
Plattner, Markus
Rau, Arne
Reiffers, Jonas
Strecker, Rafael
Barbera, Marco 
Brand, Thorsten
Wilms, Jörn
Issue Date: 2015
Volume: UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX
Editors: Siegmund, Oswald H.
Series: PROCEEDINGS OF SPIE 
Number: 9601
First Page: 96010H
Abstract: The WFI (Wide Field Imager) instrument is planned to be one of two complementary focal plane cameras on ESA's next X-ray observatory Athena. It combines unprecedented survey power through its large field of view of 40 arcmin x 40 arcmin together with excellent count-rate capability (>= 1 Crab). The energy resolution of the silicon sensor is state-of-the-art in the energy band of interest from 0.2 keV to 15 keV, e.g. the full width at half maximum of a line at 6 keV will be <= 150 eV until the end of the nominal mission phase. This performance is accomplished by using DEPFET active pixel sensors with a pixel size of 130 μm x 130 μm well suited to the on-axis angular resolution of 5 arcsec of the mirror system. Each DEPFET pixel is a combined detector-amplifier structure with a MOSFET integrated onto a fully depleted 450 μm thick silicon bulk. Two different types of DEPFET sensors are planned for the WFI instrument: A set of four large-area sensors to cover the physical size of 14 cm x 14 cm in the focal plane and a single smaller gateable DEPFET sensor matrix optimized for high count-rate observations. Here we present the conceptual design of the instrument with focus on the critical subsystems and describe the instrument performance expectations. An outline of the model philosophy and the project organization completes the presentation.
Conference Name: UV, X-Ray, and Gamma-Ray Space Instrumentation for Astronomy XIX
Conference Place: San Diego, California, United States
Conference Date: 9 -13 August, 2015
URI: http://hdl.handle.net/20.500.12386/27895
URL: https://www.spiedigitallibrary.org/conference-proceedings-of-spie/9601/1/Development-of-the-wide-field-imager-for-Athena/10.1117/12.2187012.full?SSO=1
ISSN: 0277-786X
ISBN: 9781628417678
DOI: 10.1117/12.2187012
Bibcode ADS: 2015SPIE.9601E..0HM
Fulltext: open
Appears in Collections:3.01 Contributi in Atti di convegno

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