Mupix8-Large Area Monolithic Hvcmos Pixel Detector For The Mu3e Experiment

H. Augustin, N. Berger,S. Dittmeier,F. Ehrler, C. Grzesik,J. Hammerich,A. Herkert,L. Huth,J. Kröger,F. Meier Aeschbacher,I. Perić,M. Prathapan,R. Schimassek,A. Schöning,I. Sorokin,A. Weber,D. Wiedner, H. Zhang,M. Zimmermann

NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT（2019）

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Abstract

The requirements of the ultra thin pixel detectors for the Mu3e experiment at PSI can be achieved by the HVCMOS technology, which allows the design of fast monolithic detectors. The latest nearly full size prototype, MuPix8, has a size of about 1 x 2 cm(2). The pixel readout circuitry was fully redesigned in comparison to the previous MuPix versions. MuPix8's readout electronics implement a new concept with two comparators and two different operation modes. One mode uses two threshold voltages for time walk correction, the other is a ramp-ADC. First tests show a detection efficiency of 99.6% for 4 GeV electrons.

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Key words

HVCMOS, HVMAPS, High-voltage pixel detector, Monolithic pixel detector, Mu3e, Time walk correction

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