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HK: Fachverband Physik der Hadronen und Kerne

HK 37: Instrumentation IX

HK 37.1: Gruppenbericht

Mittwoch, 30. März 2022, 14:00–14:30, HK-H3

The new Sampling-ADC readout of CBELSA/TAPS - Feature-Extraction, Pulseshape-Analysis and Pile-Up-Recovery — •Jan Schultes, Benedikt Otto, and Johannes Müllers for the CBELSA/TAPS collaboration — HISKP, Uni Bonn

The Crystal Barrel Calorimeter consists of 1320 CsI(Tl) scintillating crystals, which are read out by APDs. The signals are digitized using FPGA-controlled Sampling-ADCs.

Different feature-extraction algorithms are employed on the FPGAs to not only extract energy and timing information, but to perform online pile-up detection as well. In addition to the feature data, the sampled pulseshape can be stored in case of a detected pile-up event, to facilitate the recovery of affected features.

The talk's main focus lies on the subsequent analysis of the data and various custom methods developed to efficiently and accurately recover the features affected by pile-up. Since CsI(Tl) exhibits different scintillation characteristics dependent on the particle species, special care has to be taken in order to address this in the recovery process. Digital filtering as well as custom deconvolution methods are employed.

Finally, the setup's performance during the recent June2021 and November2021 beamtimes and the impact of the recovered data on the reconstruction of physical events is evaluated.