The data acquisition system for the KOTO experiment

Yasuyuki Sugiyama, Jia Xu, Monica Tecchio, Nikola Whallon, Duncan McFarland, Jiasen Ma, Manabu Togawa, Yasuhisa Tajima, Mircea Bogdan, Jon Ameel, Myron Campbell, Yau Wai Wah, Joseph Comfort, Taku Yamanaka

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


We developed and built a new readout and trigger electronics system, based on a waveform digitization and pipeline readout, for the KOTO experiment at J-PARC, Japan. KOTO aims at observing the rare kaon decay K<inf>L</inf> → π<sup>0</sup>vv. A total of 4000 readout channels from various detector subsystems are digitized by 14 bit 125 MHz ADC modules equipped with 10 pole Bessel filters to reduce the pile-up effects. The trigger decision is made every 8 ns using the digitized waveform information. To avoid dead time, the ADC and trigger modules have pipelines in their FPGA chips to store data while waiting for a trigger decision. The KOTO experiment performed the first physics run in May 2013. The data acquisition system worked stably during the run.

Original languageEnglish (US)
Article number7108074
Pages (from-to)1115-1121
Number of pages7
JournalIEEE Transactions on Nuclear Science
Issue number3
StatePublished - Jun 1 2015


  • Data acquisition system (DAQ)
  • event building
  • FADC
  • field-programmable gate array (FPGA)
  • front-end electronics
  • high energy physics instrumentation
  • trigger system
  • VME
  • waveform digitization

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Nuclear Energy and Engineering
  • Nuclear and High Energy Physics


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