Münster 2017 – wissenschaftliches Programm
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HK: Fachverband Physik der Hadronen und Kerne
HK 50: Instrumentation XI
HK 50.6: Vortrag
Donnerstag, 30. März 2017, 18:00–18:15, F 3
Online data pre-processing for CBM-MVD — •Qiyan Li for the CBM-MVD collaboration — Goethe-University, Frankfurt,Germany
The MVD of CBM experiment is being designed to handle 105 Au+Au or 107 p+Au collisions per second. The CMOS Monlithic Active Pixel Sensors foreseen for the MVD show charge sharing. Each hit generates clusters of few fired pixels. This improves the spatial resolution of the detecor. However, the necessary cluster finding provides a significant load to the computer farm FLES. To reduce this load and to liberate ressources for the real time tracking and secondary decay vertex finding needed, we designed and implemented an online data pre-processing running on free ressources of the FPGAs of the MVD Readout system. This algorithm reduces the shape and position lossless to a signle 32-bit word. We show the implementation of the algorithms on the FPGAs and discuss the robustness and data compression ability of the algorithm based on labory and beam tests. * supported by BMBF (05P15RFFC1), HIC for FAIR, and GSI.