Mainz 2022 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 58: Instrumentation XIV
HK 58.5: Talk
Thursday, March 31, 2022, 15:00–15:15, HK-H3
Low Gain Avalanche Diode based T0 Detector in HADES — •Wilhelm Krüger1, Tetyana Galatyuk1,2, Vadym Kedych1, Sergey Linev2, Jan Michel3, Jerzy Pietraszko2, Adrian Rost1,4, Michael Träger2, Michael Traxler2, and Christian Joachim Schmidt2 — 1TU Darmstadt, Germany — 2GSI GmbH, Darmstadt, Germany — 3Goethe-Universität Frankfurt, Germany — 4FAIR GmbH, Darmstadt, Germany
HADES at SIS18, GSI (Darmstadt, Germany), is going to use a Low Gain Avalanche Diode (LGAD) based reaction time (T0) detector in the upcoming high rate (108 p/s) pp experiment in February 2022. For the HADES physics program a T0 determination better than σT0 < 70 ps is necessary, in order to ensure a precise particle identification using time of flight information. In addition, the T0 detector will be used for beam monitoring, which requires a position resolution better than 5 mm. As the detector will be placed in-beam, a high radiation hardness is also required. The recently emerged LGAD technology is a suitable candidate to fulfill all the above listed requirements.
In this contribution the performance of HADES T0-LGADs in a beam test at COSY in Jülich in November 2021 will be presented. The LGADs were tested w.r.t. their timing precision and efficiency, employing different front end electronics. The preliminary performance of the T0 detector during the beam time in February 2022 will be presented as well.