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2004 Fiscal Year Final Research Report Summary

Development of rf ion guide for trapping unstable Be isotopes and their precision hyperfine structure spectroscopy

Research Project

Project/Area Number 14340085
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field 素粒子・核・宇宙線
Research InstitutionRIKEN

Principal Investigator

WADA Michiharu  RIKEN, Atomic Physics Laboratory, Senior Researcher, 山崎原子物理研究室, 先任研究員 (50240560)

Co-Investigator(Kenkyū-buntansha) NAKAI Yoichi  RIKEN, Atomc Physics Laboratory, Senior Rsearcher, 山崎原子物理研究室, 先任研究員 (30260194)
KOJIMA Takao  RIKEN, Atomc Physics Laboratory, Senior Rsearcher, 山崎原子物理研究室, 先任研究員 (90211896)
YAMAZAKI Yasunori  University of Tokyo, Graduate School of Arts and Science, Professor, 大学院・総合文化研究科, 教授 (30114903)
OKADA Kunihiro  Sofia University, Department of Physics, Research Assocate, 理工学部, 助手 (90311993)
KATAYAMA Ichiro  High Energy Accelerator Research Association, Institute of Particle and Nuclear Studies, Professor, 素粒子原子核研究所, 教授 (30028237)
Project Period (FY) 2002 – 2004
KeywordsRF ion guide / slow RI-beams / ion trap / Laser spectroscopy / beryllium / specific mass shift
Research Abstract

A next-generation slow radioactive nuclear ion beam facility (SLOWRI) which provides slow, high-purity and small emittance ion beams of all elements has been proposed as one of the major experimental facilities at the RIKEN RI-beam factory (RIBF). High energy radioactive ion beams from the projectile fragment separator BigRIPS are thermalized in a large gas catcher cell. The thermalized ions in the gas cell are guided and extracted to vacuum by a combination of DC electric fields and inhomogeneous RF fields in the cell (RF ion guide). In the R&D works at the present RIKEN facility, an overall efficiency of 【approximately equal】5% for 【approximately equal】100A MeV ^8Li ion beam from the present projectile fragment separator RIPS was achieved and the dependence of the efficiency on the beam intensity was investigated.
A first spectroscopy experiment at the prototype SLOWI was performed on Be isotopes. Energetic ions of ^<10>Be and ^7Be from the RIPS were trapped and laser cooled in a linear RF trap and the specific mass shifts of these isotopes were measured for the first time.

  • Research Products

    (12 results)

All 2006 2005 2004

All Journal Article (12 results)

  • [Journal Article] SLOWRI ---汎用低速RIビーム生成法---2006

    • Author(s)
      和田道治
    • Journal Title

      日本物理学会誌 61,No4

      Pages: 248

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Space-charge shift in motional resonance of Ca+ by simultaneously trapped molecular ions in a linear Paul trap2006

    • Author(s)
      K.Okada, M.Wada et al.
    • Journal Title

      Jap. J. Applied Physics 45,2A

      Pages: 951

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Photodissociation of CaOH+ for regeneration of Ca+ in a linear Paul trap2006

    • Author(s)
      K.Okada, M.Wada et al.
    • Journal Title

      Jap. J. Applied Physics 45,2A

      Pages: 956

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] SLOWRI-A universal slow RI-beam production method2006

    • Author(s)
      M.Wada
    • Journal Title

      Butsuri (in Japanese) 61, No4

      Pages: 249

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Space-charge shift in motional resonance of Ca+ by simultaneously trapped molecular ions in a linear Paul trap2006

    • Author(s)
      K.Okada, M.Wada, et al.
    • Journal Title

      Jap.J.Applied Physics 45, No2A

      Pages: 951

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Photodissociation of CaOH+ for regeneration of Ca+ in a linear Paul trap2006

    • Author(s)
      K.Okada, M.Wada, et al.
    • Journal Title

      Jap.J.Applied Physics 45, No2A

      Pages: 956

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Space-charge effects in the catcher gas cell of an RF ion guide2005

    • Author(s)
      A Takamine, M. Wada et
    • Journal Title

      Rev. Sci. Instruments. 76

      Pages: 103503-1-6

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Space-chrge effects in the catcher gas cell of an rf ion guide2005

    • Author(s)
      A.Takamine, M.Wada et al.
    • Journal Title

      Rev.Sci.Instruments 76

      Pages: 103503-1-103503-6

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] IDeceleration and cooling of radioactive isotope beams, -from GeV to μ eV-2004

    • Author(s)
      M.Wada
    • Journal Title

      Nucl. Instr. Meth. Phys. Res. A532

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Computer experiments on ion beam cooling and guiding in fair-wind gas cell and extraction RF-funnel system2004

    • Author(s)
      V.Varentsov, M.Wada
    • Journal Title

      Nucl. Instr. Meth. Phys. Res. A532

      Pages: 210

    • Description
      「研究成果報告書概要(和文)」より
  • [Journal Article] Deceleration and cooling of radioactive isotope beams, -from GeV to μeV-2004

    • Author(s)
      M.Wada
    • Journal Title

      Nucl.Instr.Methods Phys.Res.A 532

      Pages: 45

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Computer experiments on ion beam cooling and guiding in fair-wind gas cell and extraction RF-funnel system2004

    • Author(s)
      V.Varentsov, M.Wada
    • Journal Title

      Nucl.Instr.Methods Phys.Res.A 532

      Pages: 210

    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2007-12-13  

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