Focal plane instrumentation based on DEPFET Macropixel devices being a combination of the Detector-Amplifier structure DEPFET with a silicon drift chamber (SDD) has been proposed for the MIXS (Mercury Imaging X-ray Spectrometer) instrument on ESA s Mercury exploration mission BepiColombo MIXS images X-ray fluorescent radiation from the Mercury surface with a lightweight X-ray mirror system on the focal plane detector to measure the spatially resolved element abundance in Mercury s crust The sensor needs to have an energy resolution better than 200 eV FWHM at 1 key and is required to cover an energy range from 05 to 10 kev for a pixel size of 300 x 300 mu m(2) main challenges for the Instrument are radiation damage and the difficult thermal environment in the mercury orbit The production of the first batch of flight devices has been finished at the MPI semiconductor laboratory Prototype modules have been assembled to verify the electrical properties of the devices selected results are presented here The prototype devices Macropixel prototypes for the SIMBOL-X focal plane are electrically fully compatible but have a pixel size of 05 x 0 5 mm(2) Excellent homogeneity and near Fano-limited energy resolution at high readout speeds have been observed on these devices (C) 2010 Elsevier B V All rights reserved
MIXS on BepiColombo and its DEPFET based focal plane instrumentation
Porro, M;
2010-01-01
Abstract
Focal plane instrumentation based on DEPFET Macropixel devices being a combination of the Detector-Amplifier structure DEPFET with a silicon drift chamber (SDD) has been proposed for the MIXS (Mercury Imaging X-ray Spectrometer) instrument on ESA s Mercury exploration mission BepiColombo MIXS images X-ray fluorescent radiation from the Mercury surface with a lightweight X-ray mirror system on the focal plane detector to measure the spatially resolved element abundance in Mercury s crust The sensor needs to have an energy resolution better than 200 eV FWHM at 1 key and is required to cover an energy range from 05 to 10 kev for a pixel size of 300 x 300 mu m(2) main challenges for the Instrument are radiation damage and the difficult thermal environment in the mercury orbit The production of the first batch of flight devices has been finished at the MPI semiconductor laboratory Prototype modules have been assembled to verify the electrical properties of the devices selected results are presented here The prototype devices Macropixel prototypes for the SIMBOL-X focal plane are electrically fully compatible but have a pixel size of 05 x 0 5 mm(2) Excellent homogeneity and near Fano-limited energy resolution at high readout speeds have been observed on these devices (C) 2010 Elsevier B V All rights reserved
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