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RIKEN Nishina Center for Accelerator-Based Science BigRIPS Team

Team Leader: Shin'ichiro Michimasa (D.Sc.)

Research Summary

Shin’ichiro Michimasa

This team is in charge of design, construction, development and operation of BigRIPS in-flight separator and its related research instruments such as ZeroDegree spectrometer at RI beam factory (RIBF). They are employed not only for the production of RI beams but also various kinds of experimental studies using RI beams.

Main Research Fields

  • Mathematical & Physical Sciences

Related Research Fields

  • Interdisciplinary Science & Engineering
  • Engineering


  • Nuclear Physics (experiment)

Selected Publications

  • 1.T. Kubo:
    "In-flight RI beam separator BigRIPS at RIKEN and elsewhere in Japan"
    Nucl. Instr. Meth., B204, 97 (2003).
  • 2.T. Kubo, K. Kusaka, K. Yoshida, A. Yoshida, T. Ohnishi, M. Ohtake, Y. Yanagisawa, N. Fukuda, T. Haseyama, Y. Yano, N. Kakutani, T. Tsuchihashi and K. Sato:
    "Status and Overview of Superconducting Radioactive Isotope Beam Separator BigRIPS at RIKEN"
    IEEE Transactions on Applied Superconductivity, 17, 1069 (2007).
  • 3.T. Ohnishi, T. Kubo et al.:
    "Identification of New Isotopes 125Pd and 126Pd produced by In-flight Fission of 345 MeV/nucleon 238U: First Results from the RIKEN RI Beam Factory"
    Journal of the Physical Society of Japan, 77, 083201(2008).
  • 4.T. Ohnishi, T. Kubo et al.:
    "Identification of 45 New Neutron-Rich Isotopes Produced by In-flight Fission of a 238U Beam at 345 MeV/nucleon"
    Journal of the Physical Society of Japan, 79, 073201(2010).
  • 5.D. Kameda, T. Kubo et. Al.:
    "Obervation of new microsecond isomers among fission products from in-flight fission of 345 MeV/nucleon 238U"
    Phys. Rev. C86, 054319(2012)
  • 6.K. Yoshida, N. Fukuda, Y. Yanagisawa, N. Inabe, Y. Mizoi, and T. Kubo:
    "High-Power beam dump system for the Bigrips fragment separator at RIKEN RI Beam Factory"
    Nucl. Instr. Meth., B317, 373 (2013).
  • 7.H. Kumagai, T. Ohnishi, N. Fukuda, H. Takeda, D. Kameda, N. Inabe, K. Yoshida and T. Kubo:
    "Development of Parallel Plate Avalanche Counter (PPAC) for BigRIPS fragment separator"
    Nucl. Instr. Meth., B317, 717 (2013).
  • 8.K. Tanaka, N. Inabe, K. Yoshida, K. Kusaka, and T. Kubo:
    "Pillow seal system at the BigRIPS separator"
    Nucl. Instr. Meth., B317, 734 (2013).
  • 9.H. Suzuki, T. Kubo, et. al.:
    "Production cross section measurements of radioactive isotopes by BigRIPS separator at RIKEN RI Beam Factory"
    Nucl. Instr. Meth., B317, 756 (2013).
  • 10.K.Tanaka, N. Inabe, K. Yoshida, and T. Kubo:
    "Evaluation of radiation levels and comparison with PHITS calculations for the BigRIPS separator in Radioactive Isotope Beam Factory"
    Progress in Nuclear Science and Technology 4, 201 (2014).

Related Links

Lab Members

Principal investigator

Shin'ichiro Michimasa
Team Leader

Core members

Yoshiyuki Yanagisawa
Senior Research Scientist
Masao Ohtake
Senior Technical Scientist
Kensuke Kusaka
Special Temporary Employee
Naoki Fukuda
Technical Scientist
Hiroyuki Takeda
Technical Scientist
Hiroshi Suzuki
Technical Scientist
Yohei Shimizu
Technical Scientist
Yasuhiro Togano
Contract Researcher
Masahiro Yoshimoto
Postdoctoral Researcher

Contact Information

2-1 Hirosawa,
Wako, Saitama
351-0198, Japan
Email: mitimasa [at] ribf.riken.jp