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Study on the Possibility of Magnetic Deceleration of Neutrons

Research Project

Project/Area Number 59460214
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Nuclear engineering
Research InstitutionKyoto University

Principal Investigator

UTSURO Masahiko  Kyoto University Res. Reactor Inst. Professor, 原子炉実験所, 教授 (50027421)

Co-Investigator(Kenkyū-buntansha) ACHIWA Norio  Kyushu Univ. Dep. Science Professor, 理学部, 教授 (60027456)
EBISAWA Toru  Kyoto Univ. Res. Reactor Inst. Res. Assist., 原子炉実験所, 助手 (30027453)
AKIYOSHI Tsunekazu  Kyoto Univ. Res. Reactor Inst. Lecturer, 原子炉実験所, 講師 (40027420)
Project Period (FY) 1984 – 1985
Project Status Completed (Fiscal Year 1991)
Budget Amount *help
¥4,700,000 (Direct Cost: ¥4,700,000)
Fiscal Year 1985: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1984: ¥4,200,000 (Direct Cost: ¥4,200,000)
KeywordsNeutron deceleration / Very cold neutrons / Ultracold neutron trapping / Strong magnetic field / Adiabatic spin flip / Neutron guide tube / Multi-stage device
Research Abstract

Due to the recent interest on the method for the effective production of ultracold neutrons(UCN)which can be used for unique fundamental physics researches, a new approach is investigated in which the magnetic deceleration of very cold neutrons(VCR)is undertaken by using a strong magnetic field coupled with the adiabatic spin flip of neutrons. In the present research, a single unit of the magnetic decelerating device was prepared having the magnitude of the magnetic field near to 10 kG and a very small gradient of the field magnitude of about 10 G/cm which should be important for the realization of the adiabatic spin flip in the magnetic field. By using these properties and the parameter values attained in the present single test unit, some numerical analyses were carried out on the pos. sible. multistage decelerator -apparatus and the expected ultracold neutron trapping performances were studied. Further, concerning the incident VCN to be supplied to the decelbrator apparatus, the VCN facility of KUR reactor was also studied after the arrangement of the new liquid deuterium cold source, and the measured intensity of VCN was much intensified by the preparation of the present cold source. In this way, the present, studies indicated the possibility and the relating necessary' condition's for the UCN trapping in the proposed magnetic decelerator device.

Report

(1 results)
  • 1991 Final Research Report Summary
  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] Masahiko UTSURO: "A Possibility of Magnetic Pumping of Very Cold Neutrons in a Guide Tube Torus" Proc.Internat.Symp.Optical Applied Science and Engineering. (1992)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 宇津呂 雄彦: "高密度超冷中性子の生成と利用の可能性(i)生成の可能性に関する解析" 「冷中性子及び超冷中性子に関する開発と応用」ワ-クショップ会合報告書(平成2年度). I. 9-12 (1990)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masahiko UTSURO: "Ultracold Neutrons and Their Application to Studies on Condensed Matter and Elementary Particles" Ann.Rep.Res.Reactor Inst.,Kyoto Univ.17. 94-109 (1984)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] 宇津呂 雄彦: "超冷中性子の発生とその応用" 月刊フイジクス. 5. 135-143 (1984)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] Masahiko UTSURO: "New Applications of Ultra Cold Neutron Physics in Magnetic and Gravity Fields" J.de Phys.C3. 269-277 (1984)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Utsuro: "A Possibility of Magnetic Pumping of Very Cold Neutrons in a Guide Tube Torus" Proc. Intern. Symp. Optical Applied Science and Eng.(1992)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Utsuro: "Possibility of Production and Utilization of High Density Ultracold Neutrons" Proc. Workshop on Cold and Ultracold Neutron Development and Utilization. 9-12 (1990)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Utsuro: "Ultracold Neutrons and Their Application to Studies on Condensed Matter and Elementary Particles" Ann. Rep. Res. Reactor Inst., Kyoto Univ.17. 94-109 (1984)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Utsuro: "Production and Utilization of Ultracold Neutrons" Physics-Monthly Bulletin. 5. 135-143 (1984)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary
  • [Publications] M. Utsuro: "New Applications of Ultra Cold Neutron Physics in Magnetic and Gravity Fields" J. de Phys.C3. 269-277 (1984)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1991 Final Research Report Summary

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Published: 1987-03-31   Modified: 2016-04-21  

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