A filter implementation in a streaming data acquisition system at Grand RAIDEN in RCNP

ORAL

Abstract

Pair condensation caused by an effective attractive interaction is a common phenomenon in various fermion many-body systems. In the nucleonic system, neutron pair condensation is found via the measurement of neutron-pair transfer reaction while the existence of proton-neutron pair condensation is not confirmed yet. In order to quantify the p-n pair condensation, we plan to measure a pair transfer reaction of (4He,6Li) by using the Grand Riden magnetic spectrometer at RCNP.

In the (4He,6Li) reaction a lot of background events of 4He,3H, 2H and photon will be expected. Online filtering of such background events was performed by making trigger signals. But in our case trigger signals will be made by using a single thin plastic scintillator, which is sensitive to the background signals due to the large attenuation of scintillation light. Recently, a continuous readout data acquisition system has been developed among the collaboration in the SPADI Alliance. It has a capability of online filtering using non-standard detectors for a traditional trigger making, such as multi-wire drift chamber, VDC.

In this paper, an event filter using the VDC and its performance of the filter efficiency and the throughput as a function of data rate will be reported.

–

Presenters

  • Fumiya Furukawa

    • Research Center for Nuclear Physics,Osaka University

Authors

  • Fumiya Furukawa

    • Research Center for Nuclear Physics,Osaka University

  • Shinsuke Ota

    • Research Center for Nuclear Physics, Osaka University
    • RCNP, Osaka University

  • Nobu Kobayashi

    • RCNP
    • Osaka University
    • Research Center for Nuclear Physics, Osaka University
    • RCNP, Osaka University

  • Sun Young Ryu

    • Research Center for Nuclear Physics,Osaka University
    • RCNP, Osaka University

  • Kotaro Shirotori

    • Research Center for Nuclear Physics,Osaka University

  • Ryotaro Honda

    • KEK
    • High Energy Accelerator Research Organization (KEK)

  • Youichi Igarashi

    • High Energy Accelerator Research Organization (KEK)

  • Hidetada Baba

    • RNC
    • RIKEN Nishina Center
    • RIKEN Nishina Center for Accelerator-Based Science
    • RIKEN

  • Taku Gunji

    • Center for Nuclear Study, the Graduate School of Science,the University of Tokyo
    • Center for Nuclear Study, The University of Tokyo
    • Center for Nuclear Study, Graduate School of Science, the University of Tokyo
    • University of Tokyo

  • Tomoaki Hotta

    • Research Center for Nuclear Physics,Osaka University

  • Manabu Miyabe

    • Research Center for Electron Photon Science,Tohoku University

  • Hiroyuki Noumi

    • Research Center for Nuclear Physics,Osaka University

  • Masanori Dozono

    • RIKEN Nishina Center
    • Department of Physics, Kyoto University
    • Kyoto University
    • Graduate School of Science, Kyoto University
    • Kyoto University, Japan

  • Jiawei CAI

    • Institute of Modern Physics, Chinese Academy of Sciences

  • Keita Kawata

    • Center for Nuclear Study, the University of Tokyo
    • Research Center for Nuclear Physics,Osaka University

  • Fumitaka ENDO

    • Research Center for Nuclear Physics, Osaka University

  • Hiroaki Shibakita

    • Department of Physics, Osaka University

  • Che-Sheng LIN

    • SOKENDAI/High Energy Accelerator Research Organization (KEK)

  • Tomonori Takahashi

    • Research Center for Nuclear Physics,Osaka University
    • RCNP

  • Masayoshi Shoji

    • High Energy Accelerator Research Organization (KEK)

  • Masahiro Ikeno

    • Research Center for Nuclear Physics,Osaka University