Darmstadt 2016 – wissenschaftliches Programm

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HK: Fachverband Physik der Hadronen und Kerne

HK 45: Postersession

HK 45.70: Poster

Mittwoch, 16. März 2016, 18:30–20:30, S1/05 22-24

Development of an event builder for the new SADC-readout of the Crystal Barrel calorimeter — •Jan Schultes and Johannes Müllers for the CBELSA/TAPS collaboration — Helmholtz-Institut für Strahlen- und Kernphysik, Bonn, Germany

The CBELSA/TAPS experiment at the electron accelerator ELSA in Bonn investigates the photoproduction of mesons off nucleons.

Presently the readout of the CsI(Tl)-crystals of the Crystal Barrel calorimeter is being upgraded from a PIN-diode readout to an APD readout to create a fast signal for first-level-triggering. Furthermore, an entirely new setup consisting of Sampling-ADCs (SADC) with FPGA-based readout is being prepared to increase the possible data rate achievable.

The SADC is capable of sampling pulses from the detector with 80 MHz, extracting features by FPGA-logic and transferring this data via UDP. To improve package-handling, a server-client structure will be provided. It is foreseen to receive packages from each of the 48 SADC units (32 channels each), detect and handle possible package losses, distribute the received information further via TCP and control the SADC-behaviour. In addition and to assist the FPGA firmware development, a tool to monitor outgoing pulses and to extract important features, such as the deposited energy, timing information and pile-up detection to cross-check the information given by the FPGA is being developed.

Supported by the Deutsche Forschungsgemeinschaft (SFB/TR16).