SMuK 2021 – scientific programme

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HK: Fachverband Physik der Hadronen und Kerne

HK 11: Instrumentation IV

HK 11.1: Group Report

Tuesday, August 31, 2021, 14:00–14:30, H4

A new free running DAQ for future measurements at the M2 beamline at CERN — •Benjamin Moritz Veit for the AMBER DAQ collaboration — Institut für Kernphysik der Johannes Gutenberg-Universität, Mainz

Several new measurements with muon and hadron beams at the M2 beamline of the CERN SPS were approved. For the experiments, it is planned to transform the current classical DAQ approach to a free running (streaming) DAQ scheme, which is based on a trigger-less read-out of all detectors with local data processing and later online and offline data reduction stages based on FPGA and X86 filter technologies (High-Level Triggers). Few levels of FPGA multiplexers perform real-time tasks of processing timestamped hit information from the detectors, buffering, merging, and distributing data between read-out computers. The read-out computers transfer data to a local storage system. From this storage, an asynchronous running HLT system is fetching the data. On the HLT system, the data will be partially reconstructed, analyzed, and eventually reduced before it is written to permanent storage. One of the approved experiments is the measurement of the proton charge radius by elastic muon proton scattering. For this experiment, two data taking phases are foreseen. For the first phase, with a low-intensity muon beam, a full, not reduced data sample will be written to disk. This allows a complete unbiased data analysis and the validation of the filtering scheme. An overview of this novel DAQ and filtering approach will be presented.