Mainz 2022 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 38: Instrumentation X
HK 38.2: Vortrag
Mittwoch, 30. März 2022, 14:30–14:45, HK-H4
Inner-TOF, a Trigger Scintillator for HADES — •Dieter Grzonka1, Pawel Kulessa2, James Ritman2,3,1, Thomas Sefzick1, and Marcin Zielinski4 — 1Institut für Kernphysik, Forschungszentrum Jülich, 52428 Jülich, Germany — 2GSI Helmholtzzentrum für Schwerionenforschung GmbH, 64291 Darmstadt, Germany — 3Ruhr-Universität Bochum, Institut für Experimentalphysik I, 44801 Bochum, Germany — 4Jagiellonian University, 30-348 Krakow, Poland
In order to reduce the trigger rate originating from background in proton induced reaction studies at the HADES experiment an additional trigger scintillator was built. It consists of large trapezoidal shaped modules (height∼730mm, long side∼700mm, short side∼90mm) containing three separate plastic scintillator plates with a thickness of about 6 mm, which are read out by 6x6 mm2 SiPMs. Each scintillator is equipped with 12 SiPMs attached to the scintillator edge. A trigger signal is generated by exceeding a certain SiPM signal multiplicity resulting in a close to 100% efficiency for the detection of a minimum ionizing particle which was investigated with cosmic particles and proton beams at COSY. The detector system and its performance will be presented.