Heidelberg 2022 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 14: DAQ and Trigger 1
T 14.9: Vortrag
Montag, 21. März 2022, 18:15–18:30, T-H27
Data Flow in the Mu3e Filter Farm — •Marius Köppel for the Mu3e collaboration — Institute for Nuclear Physics, Johannes Gutenberg University, Mainz Germany
The Mu3e experiment at the Paul Scherrer Institute searches for the decay µ+ → e+ e+ e−. This decay violates charged lepton flavour conservation - any observation would be a clear indication for Physics Beyond the Standard Model. The Mu3e experiment aims for an ultimate sensitivity of one in 1016 µ decays. The first phase of the experiment, currently under construction, will reach a branching ratio sensitivity of 2·10−15 by observing 108 µ decays per second over a year of data taking. The highly granular detector based on thin high-voltage monolithic active pixel sensors (HV-MAPS) and scintillating timing detectors will produce about 100 GB/s of data at these particle rates.
Since the corresponding data cannot be saved to disk, a trigger-less online readout system is required which is able to sort, align and analyze the data while running. A farm with PCs equipped with powerful graphics processing units (GPUs) will perform the data reduction. The talk presents the ongoing integration of the sub detectors into the Field Programmable Gate Array (FPGA) based readout system, in particular focusing on the data flow inside the FPGAs of the filter farm. It will also show insides of the DAQ system used in the Mu3e Integration Run performed in Spring 2021.