Darmstadt 2016 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 60: Instrumentation XVII
HK 60.3: Vortrag
Donnerstag, 17. März 2016, 17:00–17:15, S1/01 A4
QDC and TDC for understanding QGP — •Adrian Rost — TU Darmstadt
A flexible COME & KISS Charge-to-Digital-Converter (QDC) and Time-to-Digital-Converter (TDC) read-out scheme will be presented. It will be used for read-out of calorimeters equipped with photomultiplier tubes (PMTs) or with multi-pixel avalanche photo-diodes (MAPDs) in the HADES and CBM experiments at GSI and the future FAIR facility in Darmstadt.
The detector input signals are integrated with the help of simple analogue electronics (KISS: Keep it Small and Simple). Afterwards the charge measurement is transformed into a Time-over-Threshold (ToT) measurement using a commercial (COME: Use Commercial Elements) FPGA as a discriminator. The well-established TRBv3 platform will provide a very precise (σt < 12 ps) FPGA TDC for a ToT measurement of the discriminated signals.
An 8-channel prototype board PaDiWa-AMPS was manufactured and successfully tested in the laboratory and under beam conditions. Beam tests and the optimization process for the HADES ECAL detector will be shown. The adaption of the read-out chain to the NA61/SHINE PSD hadron calorimeter at CERN will also be shown.
This work has been supported by VH-NG-823, Helmholtz Alliance HA216/EMMI and GSI.