Mainz 2022 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 47: Instrumentation XI

HK 47.1: Talk

Wednesday, March 30, 2022, 16:00–16:15, HK-H3

Performance of the mSTS detector in O+Ni collisions at 2 AGeV with the mCBM setup at SIS18 — •Dario Alberto Ramirez Zaldivar for the CBM collaboration — GSI Helmholtzzentrum f r Schwerionenforschung GmbH, Darmstadt, Germany — Goethe University, Frankfurt, Germany

The Compressed Baryonic Matter (CBM) is one of the experimental pillars at the FAIR facility. CBM focuses on the search for signals of the phase transition between hadronic and quark-gluon matter, the QCD critical endpoint, new forms of strange-matter, in-medium modifications of hadrons, and the onset of chiral symmetry restoration. The Silicon Tracking System is the central detector for momentum measurement and charged-particle identification. It is designed to measure Au+Au collisions at interaction rates up to 10 MHz. It consists have 1.8 million channels, having the most demanding requirements in terms of bandwidth and density of all CBM detectors. In the context of FAIR phase 0, the mini-CBM (mCBM) project is a small-scale precursor of the full CBM detector, consisting of sub-units of all major CBM systems which aim to verify CBM’s concepts of free-streaming readout electronics, data transport, and online reconstruction. In the 2021 beam campaign at SIS18 (GSI) O+Ni collisions at 2 AGeV were measured with a beam intensity up to 10¹⁰ ions per spill. The mini-STS (mSTS) setup used for the 2021 campaign consists of 2 stations with 11 sensors. First results obtained from data taken in the 2021 beam campaign will be presented with a focus on the hit reconstruction and mSTS performance studies.