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HK: Fachverband Physik der Hadronen und Kerne

HK 39: Instrumentierung - Poster

HK 39.25: Poster

Wednesday, March 23, 2011, 14:00–16:00, Foyer Chemie

Characterization of a silicon pixel readout chip for the PANDA Micro Vertex Detector — •David-Leon Pohl, Marius C. Mertens, Tobias Stockmanns, and James Ritman — IKP - Forschungszentrum Jülich GmbH

In the future PANDA experiment at FAIR an antiproton beam will collide with fixed target protons. The Micro Vertex Detector in the PANDA detector is the tracking subdetector that is necessary to detect secondary vertices marking the decay of charmed and strange baryons and D-mesons. It is the detector closest to the interaction point and consists of several barrel and forward layers of silicon sensors. The outer part is made of strips and the inner part is made of pixels. The digitization of the deposited charge due to the energy loss of the charged particles in the silicon layers is done by the time-over-threshold technique. To cope with the requirements of a triggerless readout, a high data rate and a good spatial resolution, a new pixel readout chip is designed at the INFN in Torino named ToPix. A prototype of this chip was investigated and measurement results according to its threshold dispersion, threshold tuning capabilities, noise behavior, base line restoring and time-over-threshold linearity will be shown. In order to do these measurements an FPGA based versatile digital readout system was designed at the research center in Jülich and will also be presented.