Karlsruhe 2024 – scientific programme

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T: Fachverband Teilchenphysik

T 86: Neutrino physics 10

T 86.6: Talk

Thursday, March 7, 2024, 17:15–17:30, Geb. 30.21: Gerthsen-HS

The LEGEND Experiment DAQ — •Simon Sailer for the LEGEND collaboration — Max-Planck-Institut für Kernphysik, Heidelberg, Germany

The LEGEND experiment searches for the neutrino-less double beta decay of the germanium isotope 76Ge which would reveal the Majorana nature of neutrinos and prove lepton number non-conservation. The first stage of experiment (LEGEND-200) is built at the underground facility of LNGS in Italy and is successfully taking data since beginning of 2023.

The DAQ hardware is based on the FlashCam readout system and operating at two sampling frequencies: 250/62.5 MSamples/s with 12/16-bit dynamic range respectively. The individual digitizer boards perform continous fully-digital trigger formation and are interconnected with a hierarchical clock- and trigger distribution system. In addition, the development for a 2nd stage software trigger is finished, enabling real-time reconstruction of the detected photo-electrons from the liquid Argon active veto and >millisecond time-windows on coincidence requirements.

For LEGEND-1000, R&D is ongoing for a possible upgrade of the system using new generations of FPGAs providing higher sampling frequencies with a higher on-board channel density.

Keywords: DAQ; Experimental; Neutrino; Majorana