München 2019 – scientific programme
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HK: Fachverband Physik der Hadronen und Kerne
HK 54: Poster
HK 54.64: Poster
Thursday, March 21, 2019, 16:30–19:00, Foyer Theresanium
A Monitoring System for the CALIFA Calorimeter — Roman Gernhäuser, Benjamin Heiss, •Philipp Klenze, and Lukas Ponnath for the R3B collaboration — Physik Department, Technische Universität München
Using more than 2600 scintillator crystals, the CALIFA calorimeter is a key component of the R3B experiment.
Time stamped events of independent detector units are a state of the art way to collect large event rates from high granularity detection systems. In CALIFA we combine a local time stamping with a widely used White Rabbit protocol implemented in the precision time distribution system at the upcoming Facility for Antiproton and Ion Research (FAIR) in Darmstadt.
Large buffers of event data are collected asynchronously from different subsystems and especially for online monitoring have to be sorted and combined to physics events in real time.
We will present an event builder concept which allows to monitor and compensate regular drifts between different clock domains. This is being used during FAIR the phase-0 campaign for the first time to provide online QA for the full system. We will especially discuss the interplay of rate capability and error recovery essential for scalable system operations.