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Measurement and control of temperature in the laser-heated diamond anvil cell

Research Project

Project/Area Number 09304053
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Petrology/Mineralogy/Science of ore deposit
Research InstitutionOkayama University

Principal Investigator

WALTER Micheal  Institute for Study of the Earth's Interior, Okayama University, Associate Professor, 固体地球研究センター, 助教授 (20284094)

Co-Investigator(Kenkyū-buntansha) KATSURA Tomoo  Institute for Study of the Earth's Interior, Okayama University, Associate Professor, 固体地球研究センター, 助教授 (40260666)
KANZAKI Masami  Institute for Study of the Earth's Interior, Okayama University, Associate Professor, 固体地球研究センター, 助教授 (90234153)
ITO Eiji  Institute for Study of the Earth's Interior, Okayama University, Professor, 固体地球研究センター, 教授 (00033259)
NAKAMURA Eizo  Institute for Study of the Earth's Interior, Okayama University, Professor, 固体地球研究センター, 教授 (80201672)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥30,400,000 (Direct Cost: ¥30,400,000)
Fiscal Year 1999: ¥1,200,000 (Direct Cost: ¥1,200,000)
Fiscal Year 1998: ¥9,700,000 (Direct Cost: ¥9,700,000)
Fiscal Year 1997: ¥19,500,000 (Direct Cost: ¥19,500,000)
KeywordsDiamond Anvil Cell / Laser Heating / Spectroradiometry / Temperature Control / Temperature Measurement / Melting of Pt / Melting of Fe / レーザー内部加熱法 / ダイヤモンドアンビルセル / 親石元素のFe / 下部マントル条件 / ダイアモンドアンピル装置 / ルビー蛍光 / 光電子倍増管 / レーザー / 分光 / 高圧 / 高温
Research Abstract

A system for laser heating in the diamond anvil cell has been installed at the Institute for Study of the Earth's Interior. The system provides for double-sided heating by focusing radiation from a 150 watt multi-mode CW Nd : YAG laser through both diamond anvil windows. Laser power is controlled using the optical emission from the heated sample as input for a negative feedback system, and high temperatures (2000 K) can be maintained for tens of minutes at a precision of about ±30 K.
Blackbody temperatures are measured by spectroradiometry using a spectrometer equipped with an array fomat Si-CCD.At optimal conditions, the laser heated spot is uniform over an〜40 micron diameter within ±50 K.The melting points of Fe, Pt, and Mo metals in the range of 〜1800-2900 K at 1 atmosphere have been reproduced to within 30 K.The melting point of W (3680) is reproduced within 80 K when a correction for wavelength dependent emissivity is made. The melting curve of Pt from〜3-12 GPa in the DAC has been reprodused to within about 40 K of previous work. The melting curve of Fe has been determined to 30 GPa, and is consistent within ±70 K of previous determinations made in large volume appparatus and in the laser-heated DAC.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (6 results)

All Other

All Publications (6 results)

  • [Publications] Walter,Michael: "Measurement and Control of Temperature During Double-Sided Laser Heating in the Diamond Anvil Cell (DAC)."Reviews of Scientific Instruments. (in press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] M.Walter, T.Katsura, and Y.Thibault: "Measurement and Control of temperature during double-sided Laser heating in the diamond anvil cell (DAC)"Reviews of Scientific Instruments. (in press). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Walter,M.J.: "Mantle melting and melt extraction processes beneath oceanic ridges : evidence from abyssal peridotites"Journal of Petrology. 40. 1187-1193 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Walter,M.J.: "Mantle Petrology : Feild observations and high pressure experimentation"Geochemical Society,Special Publication No.6 (Fei et al.eds.). 15 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] Walter,M.J.: "Origin of the Earth and Moon Volume"Lunar and Planetary Science Institute,Houston (Rister and Canup) (in press). (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] Michael J.Walter: "Melting of garnet peridotite and the origin of komatiite and depleted lithosphere." Journal of Petrology. 39. 29-60 (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2021-04-07  

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