Mr. Andreas Lederhuber Profile

Andreas Lederhuber

at Max-Planck-Institut für extraterrestrische Physik

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Author

Publications (4)

Proceedings Article | 31 August 2022 Paper

Time distribution on the Athena WFI

Francisco Javier Veredas, Sebastian Albrecht, Diogo Coutinho, Andreas Lederhuber, Jonas Reiffers

Proceedings Volume 12181, 121813U (2022) https://doi.org/10.1117/12.2627938

KEYWORDS: Clocks, Sensors, Oscillators, Electronics, Space operations, Picosecond phenomena, Field programmable gate arrays, X-ray telescopes, Signal detection, Field effect transistors

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Proceedings Article | 31 August 2022 Paper

Hardware development of Athena WFI frame processing module

Jonas Reiffers, Sebastian Albrecht, Olaf Hälker, Andreas Lederhuber, Benjamin Mican, Francisco Javier Veredas

Proceedings Volume 12181, 121813T (2022) https://doi.org/10.1117/12.2627846

KEYWORDS: Field programmable gate arrays, Sensors, Analog electronics, Electronics, Imaging systems, Head, Cameras, Signal processing, Field effect transistors, Photons

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Proceedings Article | 13 December 2020 Poster + Paper

Technology development of Athena WFI frame processor electronics and verification of its real-time performance

Markus Plattner, Sebastian Albrecht, Olaf Hälker, Andreas Lederhuber, Norbert Meidinger, Sabine Ott, Samuel Pliego, Jonas Reiffers, Thomas Schanz, Jan-Christoph Tenzer

Proceedings Volume 11444, 1144447 (2020) https://doi.org/10.1117/12.2562200

KEYWORDS: Electronics, Sensors, Field programmable gate arrays, Failure analysis, Imaging systems, X-ray detectors, X-rays, Observatories, Field effect transistors, Data processing

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Proceedings Article | 13 December 2020 Paper

Development status of the wide field imager instrument for Athena

Norbert Meidinger, Sebastian Albrecht, Christian Beitler, Michael Bonholzer, Valentin Emberger, Jintin Frank, Andreas Lederhuber, Johannes Müller-Seidlitz, Kirpal Nandra, Julian Oser, Sabine Ott, Markus Plattner, Rafael Strecker

Proceedings Volume 11444, 114440T (2020) https://doi.org/10.1117/12.2560507

KEYWORDS: Sensors, Imaging systems, Imaging spectroscopy, Silicon, Cameras, X-ray imaging, X-rays, Spectroscopes, Cryogenics, Image resolution

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The Wide Field Imager (WFI) instrument for ESA’s next large X-ray mission Athena is designed for imaging and spectroscopy over a large field of view, and high count rate observations up to and beyond 1 Crab source intensity. The other focal plane instrument, the cryogenic X-IFU camera, is designed for high-spectral resolution imaging. Both cameras share alternately a mirror system based on silicon pore optics with a focal length of 12 m and unprecedented large effective area of about 1.4 m² at 1keV. The WFI instrument employs DEPFET active pixel sensors, which are fully depleted, back-illuminated silicon devices of 450 μm thickness. The detectors provide high quantum efficiency and state-of-the art energy resolution in the 0.2 keV to 15 keV energy range with extremely fast readout speeds compared to previous generations of Si detectors for X-ray astronomy. The focal plane comprises a Large Detector Array (LDA) and a Fast Detector (FD). The LDA comprises about 1 million pixels and a time resolution in full frame mode of 5 ms. The FD optimized for bright point source observations permits a time resolution of even 80 μs with about 4000 pixels. Both detectors have a pixel size of 130 μm × 130 μm, providing oversampling of the PSF by a factor >2. The instrument development is in phase B of the project after a successful Preliminary Requirements Review and endorsement of the both instrument consortia by ESA. Critical technology developments for the WFI focal plane camera are currently investigated and finally experimentally verified with breadboard models: the detector function and performance, the real-time capability of onboard event pre-processing and the integrity of the large-area and ultra-thin optical blocking filter after environmental tests. Flight-size sensors have been produced and a flight-like detector assembly has been developed. First test results of a flight-size detector are expected in near future. Based on the thermal design and model for the camera head (CH), thermal interface requirements have been estimated.

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