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Development of ultrahigh pressure apparatus based on high pressure produced by constraining thermal expansion

Research Project

Project/Area Number 06559013
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section試験
Research Field 広領域
Research InstitutionTokai University

Principal Investigator

KAWASHIMA Yasushi  Tokai University, Faculty of Engineering, Professor, 工学部, 教授 (80169721)

Co-Investigator(Kenkyū-buntansha) OBIKAWA Toshiyuki  Tokyo Institute of Technology, Faculty of Engineering, Associate Professor, 工学部, 助教授 (70134830)
Project Period (FY) 1994 – 1996
Project Status Completed (Fiscal Year 1996)
Budget Amount *help
¥16,300,000 (Direct Cost: ¥16,300,000)
Fiscal Year 1996: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1995: ¥9,000,000 (Direct Cost: ¥9,000,000)
Fiscal Year 1994: ¥6,600,000 (Direct Cost: ¥6,600,000)
KeywordsUltrahigh pressure apparatus / Thermal pressure / Pulse-laser heating / high-pressure measurement / diamond anvil cell / 超高圧発生装置 / レーザー加熱 / ダイヤモンドアンビル / 圧力測定 / 固体水素 / ダイヤモンド・アンビル / 高温測定
Research Abstract

An ultrahigh pressure apparatus based on high pressure produced by constraining thermal expansion is developed. In the apparatus, a sample compressed between two diamond anvils is irradiated with a high-power YAG laser pulse through diamond window. Ultrahigh pressure can be produced by constraining thermal expansion due to ultrahigh temperature generated in the central region of the sample. However, the existence of ultrahigh temperature region in the sample gives rise to difficulties in the pressure measurements. In the apparatus, solidified gas having very small thermal conductivity is used as the sample in order to produce very large gradients in temperature across the sample. Then it is demonstrated by calculations using the finite difference method that the lower temperature region can appear in the corner of the sample chamber. The high pressure can be measured by observing laser-induced fluorescence of a ruby crystal placed in the lower temperature region. The apparatus is equipped with a temperature-and-pressure measuring system that is designed to satisfy the following requirements : (1) radiation spectra from three arbitrary positions in the sample can be simultaneously observed ; (2) excitation laser beam can be focused at point of preselected ruby crystal and the laser-induced fluorescence spectrum of the ruby crystal can be observed ; (3) simultaneous time-resolved measurements for these spectra can be achieved by using cooled CCD in kinetics mode. A cryogenic technique for loading gases in the diamond anvil cell is also devised, which is applied to the H_2 loading. Furthermore, it is confirmed experimentally that the optical system and the diamond anvil cell are not damaged by the high-power laser pulses. Thus it is demonstrated that the ultrahigh-pressure experiments using solidified H_2 as the sample can be executed by the present apparatus.

Report

(4 results)
  • 1996 Annual Research Report   Final Research Report Summary
  • 1995 Annual Research Report
  • 1994 Annual Research Report
  • Research Products

    (15 results)

All Other

All Publications (15 results)

  • [Publications] Y.Kawashima and G.Katagiri: "Fundamentals,overtones,and combinations in the Raman spectrum of graphite" PHYSICAL REVIEW B. 52. 10053-10059 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Kawashima and G.Katagiri: "Higher-order Raman scattering of graphite" Proceedings of the XIVth International Conference on Raman Spectroscopy,John Wiley & Son. 752-753 (1994)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Kawashima: "An ultrahigh-pressure apparatus based on high pressure produced by constraining pulse-laser-induced thermal expansion" in preparation.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 片桐 元、川島 康: "HOPGのラマンスペクトルにおける層間モード" 第23回炭素材料学会年会要旨集. 180-181 (1996)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 川島 康、片桐 元: "グラファイトのラマンスペクトルにおける新しいバンド" 第22回炭素材料学会年会要旨集. 176-177 (1995)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Kawashima and G.Katagiri: "Fundamentals, overtones and combinations in the Raman spectrum of graphite" Phys.Rey. B52. 10053-10059 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Kawashima and G.Katagiri: "Higher-order Raman scattering of graphite" Proceedings of the XIVth International Conference on Raman Spectroscopy, John Wiley & Son. 752-753 (1994)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Kawashima: "An ultrahigh-pressure apparatus based on high pressure produced by constraining pulse-laser-induced thermal expansion" (in preparation).

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] Y.Kawashima and G.Katagiri: "New bands in the Raman spectrum of graphite" 22th Carbon Conf., J.Carbon Soc. 176-177 (1995)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] G.Katagiri and Y.Kawashima: "Observation of the out of plane mode in Raman spectrum of graphite" 23th Carbon Conf., J.Carbon Soc. 180-181 (1996)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1996 Final Research Report Summary
  • [Publications] 片桐元、川島康: "HOPGのラマンスペクトルにおける層間モード" 第23回炭素材料学会年会要旨集. 180-181 (1996)

    • Related Report
      1996 Annual Research Report
  • [Publications] Yasushi Kawashima: "An ultrahigh-pressure apparatus based on high pressure produced by constraining pulse-laser-induced thermal expansion." International Conference on High Pressure Science & Technology JOINT AIRAPT-16 & HPCJ-38,1997. (発表予定). (1997)

    • Related Report
      1996 Annual Research Report
  • [Publications] Y. Kawashima & G. Katagiri: "Fundamentals, overtones, and combinations in the Raman spectrum of graphite" Physical Review B. 52. 10053-10059 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] 川島 康,片桐 元: "グラファイトのラマンスペクトルにおける新しいバンド" 第22回炭素材料学会年会要旨集. 176-177 (1995)

    • Related Report
      1995 Annual Research Report
  • [Publications] Y.Kawashima & G.Katagiri: "Higher-order Raman scattering of graphite" Proc.XIVth International Conference on Raman Spectroscopy. 752-753 (1994)

    • Related Report
      1994 Annual Research Report

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Published: 1994-04-01   Modified: 2016-04-21  

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