Characterization of a 256 × 256 pixel DEPFET detector for the WFI of Athena
| Autor: | Johannes Müller-Seidlitz, Wolfgang Treberspurg, Valentin Emberger, Norbert Meidinger, Annika Behrens, Peter Lechner, Günter Hauser, Robert Andritschke, Michael Bonholzer |
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| Rok vydání: | 2020 |
| Předmět: |
Thin gate oxide
Physics Nuclear and High Energy Physics Fabrication Pixel Physics::Instrumentation and Detectors business.industry Detector Astrophysics::Instrumentation and Methods for Astrophysics Phase (waves) 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Characterization (materials science) 010309 optics Optics Cardinal point 0103 physical sciences 0210 nano-technology business Instrumentation Energy (signal processing) |
| Zdroj: | Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment. 958:162555 |
| ISSN: | 0168-9002 |
| DOI: | 10.1016/j.nima.2019.162555 |
| Popis: | The Wide Field Imager (WFI) instrument is one of two complementary focal plane cameras on ESA’s next large class X-ray astronomy mission Athena. It is coupled to a high performance X-ray mirror to provide an unprecedented survey power by combining a large field of view with an excellent count rate capability. The required spectral performance, sensitive area and readout timing necessitated the development of specific DEFPET detectors. In the course of the technology development phase of the project, different options of prototype detectors were fabricated and investigated. As a result, a new generation of spectroscopic X-ray DEPFET detectors was developed for the flight production. Those detectors will feature a linear gate layout, thin gate oxide fabrication technology and a drain current readout. In this paper, we present the detailed characterization of a prototype detector covering a large sensitive area of 256 × 256 pixels. Due to the progress in the detector development an energy resolution as low as 128 eV FWHM at 6 keV was obtained. |
| Databáze: | OpenAIRE |
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