Heidelberg 2015 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 50: Instrumentation 15
HK 50.2: Vortrag
Donnerstag, 26. März 2015, 15:00–15:15, M/HS1
The PASTA Chip - A Free-Running Readout ASIC for Silicon Strip Sensors in PANDA — •André Goerres1, Tobias Stockmanns1, James Ritman1, and Angelo Rivetti2 for the PANDA collaboration — 1Forschungszentrum Jülich GmbH, Jülich, Germany — 2INFN Sezione di Torino, Torino, Italy
The PANDA experiment is a multi purpose detector, investigating hadron physics in the charm quark mass regime. It is one of the main experiments at the future FAIR accelerator facility, using pp annihilations from a 1.5-15 GeV/c anti-proton beam. Because of the broad physics spectrum and the similarity of event and background signals, PANDA does an event selection based on the complete raw data of the detector. The innermost of PANDA’s sub-systems is the Micro Vertex Detector (MVD), consisting of silicon pixel and strip sensors. The latter will be read out by a specialized, free-running readout front-end called PANDA Strip ASIC (PASTA).
It has to face a high event rate of up to 40 kHz/ch in an radiation-intense environment. To fulfill the MVD’s requirements, it has to give accurate timing information to incoming events (<10 ns) and determine the collected charge with an 8-bit precision. All this has to be done with a very low power design (<4 mW/ch) on a small footprint with less than 21 mm2 and 60 µm input pitch for 64 channels per chip. Therefore, a simple, time-based readout approach with two independent thresholds is chosen.
In this talk, the conceptual design of the full front-end and some aspects of the digital part will be presented.