Göttingen 2012 – scientific programme

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T: Fachverband Teilchenphysik

T 73: DAQ-Systeme

T 73.4: Talk

Wednesday, February 29, 2012, 17:30–17:45, VG 1.102

FPGA Based Data Reduction Algorithm for the Belle-II DEPFET Detector — •David Münchow, Sören Fleischer, Thomas Gessler, Wolfgang Kühn, Jens-Sören Lange, and Björn Spruck — II. Physikalisches Institut, Universität Gießen

for the Belle-II PXD Collaboration
The readout system of the pixel detector (PXD) at the future Belle-II experiment will have to cope with an estimated input data rate of ≤ 21.6 GB/s. The hardware platform of the readout system is going to be ATCA-based Compute Node (CN) with Xilinx Virtex-5 FX70T FPGAs. The large data rate must be reduced by a factor ∼ 10 before being send to the event builder. The reduction is done by a region-of-interest (ROI) algorithm based upon e.g. track finding on the high level trigger (HLT).
The free/occupied buffer management, ROI selection, and data unpacking algorithms, programmed in VHDL for the FPGAs, will be explained in detail. Performance results for 100/200 MHz clocks and 32/64 bit bus width will be presented.
This work is supported by BMBF under grant number 05H10RG8.