Title :
Beam test performance of the ONSEN data reduction system for the Belle II pixel detector
Author :
Gessler, Thomas ; Kuhn, Wolfgang ; Lange, Jens Soren ; Zhen´an Liu ; Munchow, David ; Spruck, Bjorn ; Jingzhou Zhao
Author_Institution :
II. Phys. Inst., Justus Liebig Univ. Giessen, Giessen, Germany
Abstract :
Summary form only given. We present an FPGA-based online data reduction system for the pixel detector of the future Belle II experiment. At the SuperKEKB design luminosity of 8 × 1035 cm-2 s-1 and a trigger rate of 30 kHz, the occupancy of the pixel detector is conservatively estimated at 3 %. With its almost 8 million channels, this corresponds to a data output rate of more than 20 GB/s after zero suppression, dominated by background. The Online Selection Nodes (ONSEN) system aims at reducing the background data by a factor of 30, in order to reach an output data rate that the Belle II event builder system can handle.
Keywords :
data reduction; testing; Belle II event builder system; Belle II pixel detector; FPGA-based online data reduction system; ONSEN data reduction system; SuperKEKB design luminosity; background data; beam test performance; online selection nodes system; output data rate; zero suppression; Data acquisition; Detectors; Field programmable gate arrays; Linux; Optical buffering; Random access memory;
Conference_Titel :
Real Time Conference (RT), 2014 19th IEEE-NPSS
Print_ISBN :
978-1-4799-3658-8
DOI :
10.1109/RTC.2014.7097497