SMuK 2023 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 74: Poster
HK 74.52: Poster
Donnerstag, 23. März 2023, 17:30–19:00, HSZ EG
CBM-TRD hit time extraction — •Philipp Kähler1, Marius Kunold2, and David Schledt2,3 for the CBM collaboration — 1Institut für Kernphysik, WWU Münster — 2Institut für Kernphysik, Goethe-Universität Frankfurt — 3Infrastruktur und Rechnersysteme in der Informationsverarbeitung, Goethe-Universität Frankfurt
The Transition Radiation Detector (TRD) of the upcoming CBM experiment will be based on Multi-Wire Proportional Chambers (MWPCs), which are read-out via their segmented cathode pad-planes. The incoming charge from hits is amplified and shaped in the analogue part of the read-out ASICs, i.e. the SPADIC chip. The resulting shaper signals are digitised directly in its integrated sampling ADC. As the transmission function of the shaper is well known, the signal arrival time can be extracted from the transmitted ADC samples with a precision well below the sampling frequency of 16 MHz.
This poster shows implementations of the time value extraction for measured signals, which is used in the chain to TRD hit reconstruction. Different methods, based on a look-up table approach as well as on direct calculation, have been tested on real data from mCBM measurements (FAIR phase 0 programme) at the SIS18 accelerator. Implementations for online application of the time extraction in the Common Readout Interface (CRI) FPGA of our system will be covered. This work is supported by BMBF grants 05P21RFFC1 and 05P21PMFC1.