Centers & Labs

RIKEN Nishina Center for Accelerator-Based Science

Computing and Network Team

Team Leader: Takashi Ichihara (D.Sci.)
Takashi  Ichihara(D.Sci.)

This team is in charge of development, management and operation of the computing and network environment, mail and information servers and data acquisition system, and management of the information security. We are operating Linux/Unix NIS/NFS cluster system for the data analysis of the experiments and general computing. We are operating mail server of Nishina Center which is capable of tagging spam mails and isolating virus-infected mail. Encrypted communications with the mail server enables us the secure and stable E-mail access from the remote place. We are operating several information servers such as WWW servers, Wiki servers, elog server, Groupware servers, streaming servers, research record server, and an anonymous FTP server ( We are developing a data-acquisition (DAQ) system for the RIBF. This DAQ system has functions of network-distributed data processing, hierarchical event building and parallel readout which are achieved with newly developed software and commodity hardware. This system merges data taken by different DAQ systems based on the time stamp. This DAQ system is both versatile and scalable, allowing it to meet the various requirements for RIBF experiments.

Main Research Field

Mathematical and physical sciences

Related Research Fields



  • Nuclear Physics
  • Direct Reaction
  • Charge exchange Reaction
  • RHIC Spin Phsics
  • Information security

Selected Publications

  1. T. Ichihara et al.:
    "Isovector Quadrupole resonance observed in the 60Ni(13C,13N)60Co Reaction at E/A=100 MeV"
    Phys, Rev. Lett. 89 142501 (2002)
  2. H. Baba, T. Ichihara, T. Ohnishi, S. Takeuchi, K. Yoshida, Y. Watanabe, S. Ota, and S. Shimoura.:
    "New data acquisition system for the RIKEN Radioactive Isotope Beam Facility"
    Nucl. Instru. Method. A616 (2010) 65-68
  3. H. Baba, T. Ichihara, T. Ohnishi, S. Takeuchi, K. Yoshida, Y. Watanabe, S. Ota, S. Shimoura, K. Yoshinaga.:
    "Time-stamping system for nuclear physics experiments at RIKEN RIBF"
    Nucl. Instru. Method. A777 (2015) 75-79
  4. T. Ichihara,Y. Watanabe, K.Yoshida, and A.Yoshida.:
    "Computing and Network environment at RIKEN Nishina Center"
    RIKEN Accel. Prog. Rep. 49 p.205 (2016)
  5. PHENIX Collaboration (A. Adare et al.).:
    "Cross section and transverse single-spin asymmetry of single muons from open heavy flavor decays in polarized p+p collisions at √s =200 GeV"
    Phys. Rev. D 95, 112001 (2017)
  6. PHENIX Collaboration (A. Adare et al.).:
    "Measurement of transverse-single-spin asymmetries for midrapidity and forward-rapidity production of hadrons in polarized p+p collisions at √s =200 and 62.4 GeV"
    Phys.Rev. D90 (2014) 1, 012006
  7. PHENIX Collaboration (A. Adare et al.).:
    "Inclusive cross section and single transverse spin asymmetry for very forward neutron production in polarized p+p collisions at sqrt{s}=200  GeV"
    Phys.Rev. D88 (2013) 3, 032006
  8. PHENIX Collaboration (A. Adare (Colorado U.) et al.).:
    "Gluon-Spin Contribution to the Proton Spin from the Double-Helicity Asymmetry in Inclusive π0 Production in Polarized p+p Collisions at √s=200  GeV"
    Phys. Rev. Lett. 103 (2009), 012003
  9. PHENIX Collaboration (Stephen Scott Adler et al.):
    "Measurement of direct photon production in p + p collisions at √s = 200-GeV."
    Phys. Rev. Lett. 98 012002 (2007)
  10. PHENIX Collaboration (Adcox, K. et al.):
    "Suppression of hadrons with large transverse momentum in central Au+Au collisions at s(NN)**(1/2) = 130-GeV"
    Phys.Rev.Lett., 88 (2002), 022301

Lab Members

Principal Investigator

Takashi Ichihara
Team Leader

Core Members

Yasushi Watanabe
Senior Research Scientist
Hidetada Baba
Nishina Center Research Scientist