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Technology Transfer - CCD X-ray Imaging Converters

An X-ray camera based on novel CCD (Charged Coupled Device) imaging converters is developed by the Max-Planck-Institut for future X-ray satellites, as the European XMM observatory and the German ABRIXAS small-satellite. This pn-CCD X-ray detector should reach a good spectral and high time resolution in connection with a nearly perfect efficiency. For this purpose the Max-Planck-Institut has established an own solid state laboratory (Halbleiterlabor - HLL). The detectors developed there open the chance for medical and technical applications.

HLL - clean room Figure 1: The MPI/MPE semiconductor laboratory (HLL) is a research laboratory for semiconductor radiation detectors. It was founded in 1991 by the Max-Planck-Institut für Physik and the Max-Planck-Institut für extraterrestrische Physik to supply them with devices for their experiments in High Energy Physics and X-ray Astronomy. The main activities at the Halbleiterlabor are currently the development and production of micro-strip detectors and of pn-CCDs. Micro-strip detectors are needed for the HERA-B detector at DESY and the ATLAS Semiconductor Tracker at CERN. The pn-CCD's will work as imaging X-ray sensors on board of two space missions: the European XMM and the German ABRIXAS satellite. The Halbleiterlabor has already delivered pad detectors for CELIAS on the SOHO satellite.
Bild 66 Figure 2: The 6 cm × 6 cm large pn-CCD will be the heart of the EPIC/XMM camera. The picture shows the twelve chips mounted and the connections to the integrated preamplifiers. The quantum efficiency is greater than 80% over the whole XMM energy range of 200 eV to 12 keV. It is extremely radiation-resistant, has a good energy resolution, and owns an excellent time resolution. The development and production is realized by the MPE.
Kalender August 1997 Figure 3: The ESA X-ray satellite XMM and the ROSAT successor ABRIXAS will be equipped with solid state detectors (X-ray CCDs). The picture shows the expendable electronics for the voltage supply and reading of the twelve CCDs of the pn-camera for XMM and ABRIXAS. The breakthroughs in the printed circuit board opens the view to the backside of the CCD.

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