Data flow and high level trigger of belle II DAQ system

Author

Itoh, Ryusei ; Higuchi, Tatsuro ; Nakao, Masahiro ; Suzuki, S.Y. ; Lee, Sang-Rim

fYear

2012

fDate

9-15 June 2012

Firstpage

1

Lastpage

4

Abstract

The Belle II experiment is a new generation B-factory experiment with a new accelerator SuperKEKB. The luminosity of the accelerator is expected to be more more than 40 times higher than that of previous KEKB, the average Level 1 trigger rate is estimated to become up to 30 kHz with a total raw data size of ~1.1M bytes, resulting in a data rate of ≥30 Gbytes/sec. To manage this huge data flow, the Belle II DAQ system is designed to perform a multi-step data reduction using a large number of CPUs implemented in various DAQ components from the detector readout modules to the high level trigger farm. The design of the data flow in the Belle II DAQ system is reported in this contribution.pixel detector

Keywords

data acquisition; data reduction; digital readout; high energy physics instrumentation computing; multiprocessing systems; nuclear electronics; semiconductor counters; trigger circuits; B-factory experiment; Belle II DAQ system; accelerator SuperKEKB; accelerator luminosity; data flow; data flow design; detector readout modules; high level trigger; level 1 trigger rate; multistep data reduction; total raw data size; Buildings; Copper; Data acquisition; Detectors; Linearity; Servers; Software;

fLanguage

English

Publisher

ieee

Conference_Titel

Real Time Conference (RT), 2012 18th IEEE-NPSS

Conference_Location

Berkeley, CA

Print_ISBN

978-1-4673-1082-6

Type

conf

DOI

10.1109/RTC.2012.6418174

Filename

6418174