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Spectroscopic Research of hot electron transport in Fast Igniter Plasmas

Research Project

Project/Area Number 13480136
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionOsaka University

Principal Investigator

NISHIMURA Hiroaki  Institute of Laser Engineering, Professor, レーザー核融合研究センター, 教授 (60135754)

Co-Investigator(Kenkyū-buntansha) KODAMA Ryosuke  Institute of Laser Engineering, Associate Professor, レーザー核融合研究センター, 助教授 (80211902)
SAKABE Shuji  Kyoto U., Institute of Chemistory, Professor, 化学研, 教授 (50153903)
田中 和夫  大阪大学, 大学院・工学研究科, 教授 (70171741)
NORIMATSU Takayoshi  Institute of Laser Engineering, Professor, レーザー核融合研究センター, 教授 (50135753)
KITAGAWA Yoneyoshi  Institute of Laser Engineering, Associate Professor, レーザー核融合研究センター, 助教授 (40093405)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥13,700,000 (Direct Cost: ¥13,700,000)
Fiscal Year 2003: ¥2,300,000 (Direct Cost: ¥2,300,000)
Fiscal Year 2002: ¥5,900,000 (Direct Cost: ¥5,900,000)
Fiscal Year 2001: ¥5,500,000 (Direct Cost: ¥5,500,000)
KeywordsLaser Fusion / Fast Igniter / X-ray spectroscopy / Fast electrons / Relativistic plasmas / プラズマ診断 / Kα線分光
Research Abstract

In laser fusion research, fast igniter scheme has shown a good progress. In this scheme, after compression of the fuel to more than a thousand times solid-density has occurred, the fuel is enforcedly heated with energetic electrons generated by a Peta-watt laser pulse. Efficient energy transfer to and deposition in the dense plasma is one of the critical issues in this scheme. A new spectroscopic method providing time-and space-resolved information has been established to provide a more quantitative understanding of the energy deposition than those provided by particle measurements. Moreover, an atomic kinetic equation solver, dedicated for analysis of partially ionized plasma, has been developed to extract plasma parameters such as temperature of ultra-high intensity laser produced plasma.
X-ray spectra ranging from Kα to He-α lines of chlorine or aluminum were observed by using bi-layered plastic or metallic targets, and the dependence of the emitted line intensities on overcoat thickness was measured. The experimental results on the plastic targets were compared to an integrated analysis that attempted to simulate the observed spectrum: First, the experimental hot-electron energy distribution function was used as the initial condition to a one-dimensional (1D) Fokker-Planck transport calculation that is coupled to a 1D radiation hydrodynamic simulation. This provided the temporal evolution of temperature and density pro>les of the plasma. Second, these pro>les were given as input to an atomic kinetics code to provide temporal evolution of the spectra. Thus, the ionization-shifted Kα lines were calculated for comparison to experiments. The comparisons show a reasonable agreement with the experimental Cl Kα lines but not with those from higher ionization stages such as He-α line.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (21 results)

All Other

All Publications (21 results)

  • [Publications] Y.Ochi, T.Kawamura, H.Nishimura, 他5名: "Analysis of laser imploded core plasma formation by L-like satellite lines from argon dopant"Journal of Quantitative Spectroscopy and Radiation Transfer. 71,No2-6. 531-540 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] I.Golovkin, R.Manchini, S.Louis, Y.Ochi, K.Fujita, H.Nishimura, 他10名: "Spectroscopic determination of dynamic plasma gradients in implosion cores"Physical Review Letters.. 88,No.4. 045002-1-045002-4 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Ochi, I.Golovkin, I.Uschmann, K.Fujita, R.Mancini, S.Louis, H.Nishimura: "Temporal Evolution of Temperature and Density Profiles of a Laser Compressed Core"Review of Scientific Instruments. 74,No3. 1683-1687 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Kawamura, T.Schlegel, H.Nishimura, F.Koike 他10名: "Numerical study of Kα emission from partially ionized chlorine"Journal of Quantitative Spectroscopy and Radiation Transfer. 81. 237-246 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Nishimura, T.Kawamura, R.Matsui, 他9名: "Kα Spectroscopy to Study Energy Transport in Ultrahigh-intensity Laser Plasmas"Journal of Quantitative Spectroscopy and Radiation Transfer. 81. 327-337 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Ochi, T.Kawamura, H.Nishimura, et al.: "Analysis of laser imploded core plasma formation by L-like satellite lines from argon dopant"Journal of Quantitative Spectroscopy and Radiation Transfer. Vol.71, No2-6. 531-540 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] I.Golovkin, R.Manchini, S.Louis, Y.Ochi, K.Fujita, H.Nishimura, et al.: "Spectroscopic determination of dynamic plasma gradients in implosion cores"Physical Review Letters. Vol.88, No.4. 045002~1-045002~2 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Ochi, I.Golovkin, I.Uschmann, K.Fujita, R.Mancini, S.Louis, H.Nishimura, et al.: "Temporal Evolution of Temperature and Density Profiles of a Laser Compressed Core"Review of Scientific Instruments. Vol.74, No3. 1683-1687 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] T.Kawamura, T.Schlegel, H.Nishimura, F.Koike, et al.: "Numerical study of K□ emission from partially ionized chlorine"Journal of Quantitative Spectroscopy and Radiation Transfer. Vol.88. 237-246 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] H.Nishimura, T.Kawamura, R.Matsui, et al.: "Kα Spectroscopy to Study Energy Transport in Ultrahigh-intensity Laser Plasmas"Journal of Quantitative Spectroscopy and Radiation Transfer.. Vol.81. 327-337 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Ochi, I.Golovkin, I.Uschmann, K.Fujita, R.Mancini, S.Louis, H.Nishimura他9名: "Temporal Evolution of Temperature and Density Profiles of a Laser Compressed Core"Review of Scientific Instruments. 74, no3. 1683-1687 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Kawamura, T.Schlegel, H.Nishimura, F.Koike他10名: "Numerical study of Kα emission from partially ionized chlorine"Journal of Quantitative Spectroscopy and Radiation Transfer. 81. 237-246 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] H.Nishimura, T.Kawamura, R.Matsui他9名: "Kα Spectroscopy to Study Energy Transport in Ultrahigh-intensity Laser Plasmas"Journal of Quantitative Spectroscopy and Radiation Transfer. 81. 327-337 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] T.Kawamura, H.Nishimura 他 名: "Population kinetics on Kα lines of partially ionized Cl atoms"Physical Review E. 60. 016402-1-016402-8 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] R.Kodama, 他 名: "Fast heating scalable to laser fusion ignition"Nature. 418/6901. 933-934 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] H.Nishimura, 他 名: "X-ray spectroscopic measurements of energy transport and deposition in ultra-intensity laser produced plasma"Journal of Quantitative Spectroscopy and Radiation Transfer. Vol.8,No.1-4. 327-337 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Kawamura, 他 名: "Numerical study of Kα emission from partially ionized chlorine"Journal of Quantitative Spectroscopy and Radiation Transfer. Vol.9,No.1-4. 237-246 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Kitagawa, 他 名: "Progress of fast ignitor studies and Petawatt laser construction at Osaka University"Physics of Plasmas. Vol.9,No.5. 2202-2207 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Ochi, T.Kawamura, H.Nishimura, et al.: "Analysis of laser imploded core plasma formation by Li-like satellite lines from argon dopant"Journal of Quantitative Spectroscopy & Radiative Transfer. 71. 531-540 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Nishimura, T.Kawamura, Y.Ochi, et al.: "X-ray spectroscopy on energy transport and deposition in Ultra-intensity laser produced plasma"Proceeding of the 2nd Int. Conference on Superstrong Fields in Plasmas, Varema, Aug.27-Sep.1, 2001. (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] H.Nishimura, T.Kawamura, Y.Ochi, et al.: "Study on energy transport and deposition in ultra-intense laser plasma interactions by Kα line spectroscopy"2nd International Conference on Inertial Fusion Science and Applications, Kyoto, Sep.9-14, 2001. (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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