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Numerical modeling of a high-gain x-ray laser in an avalanche recombination high density plasma

Research Project

Project/Area Number 15540478
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Plasma science
Research InstitutionHIROSHIMA KAKUSAI GAKUIN UNIVERSITY

Principal Investigator

ODA Toshiatsu  Hiroshima Kokusai Gakuin University, Faculty of Engineering, Professor, 工学部, 教授 (60034550)

Co-Investigator(Kenkyū-buntansha) NAMBA Shinichi  Hiroshima University, Research Associate, 大学院・工学研究科, 助手 (00343294)
Project Period (FY) 2003 – 2004
Project Status Completed (Fiscal Year 2004)
Budget Amount *help
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 2004: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 2003: ¥1,000,000 (Direct Cost: ¥1,000,000)
Keywordsrecombination x-ray laser / avalanche recombination / collisional-radiative model / hydrogen-like ion / high gain / numerical simulation / charge exchange process / 水素様炭素イオン / X線レーザー / プラズマ分光 / 過渡的反転分布
Research Abstract

The recombination x-ray laser has been extensively studied because this scheme has potentiality to develop compact x-ray laser. However, most investigations have been made in plasmas under the quasi-steady state approximation. In these plasmas, the population inversion cannot be generated for higher electron density than a certain value. Consequently, the gain for laser oscillation cannot be increased over a limited value. The objective of our project by numerical calculation is to demonstrate that significant improvement in gain performance becomes feasible of the recombination x-ray laser in quite transient (avalanche) recombination of high density plasma in which the quasi-steady state approximation is invalid. An outline of our research results is as follows :
An atomic physics code is developed for the avalanche recombination plasma with low-z ions. Time-dependent rate equations for carbon ions were solved in the recombination phase of the fully ionized carbon high density plasma. The initial electron temperature was set to be 10 eV, equivalent to 0.28 eV for the hydrogen plasma. For the electron density higher than 10^<19>cm^<-3> the gain for the C Vl 18.2 nm becomes over 5000cm^<-1>, and increases with the electron density while the duration of population inversion decreases from 1 ps to 10 fs. This shows transient high-gain x-ray laser is feasible due to the avalanche recombination. Charge exchange process between fully ionized carbon ions and helium atoms was also included in the rate equations. The calculation shows that the gain for the CVl 18.2 nm line is as much as 3500cm^<-1> while the corresponding gain without the charge exchange process decreases down to about 200cm^<-1>. This clearly indicates that the charge exchange process plays also a very useful role in producing the avalanche recombination x-ray laser.

Report

(3 results)
  • 2004 Annual Research Report   Final Research Report Summary
  • 2003 Annual Research Report
  • Research Products

    (14 results)

All 2005 2004 2003 Other

All Journal Article (12 results) Publications (2 results)

  • [Journal Article] Recombination Process of Laser Produced ZnO Plasma in a Gas Atmosphere2005

    • Author(s)
      S.Namba, R.Nodu, K.Takiyama
    • Journal Title

      30th IEEE Int.Conf.on Plasma Science Jeju, Korea June 2-5

      Pages: 367-367

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Observation of Interference between Stark and Electric Quadrupole Transitions in LIF from He Atoms in Plasmas2004

    • Author(s)
      K.Takiyama, S.Namba, S.Furukawa, T.Oda, B.W.James, D.Andruczyk
    • Journal Title

      4th Int.Symp.on Plasma Polarization Spectroscopy, Kyoto, Japan NIFS PROC-57

      Pages: 137-143

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Annual Research Report 2004 Final Research Report Summary
  • [Journal Article] Charge Exchange Recombination X-ray Lsser in a Cluster Plasma Produced by an Ultra-Short High Intensity Pulse Laser2004

    • Author(s)
      S.Namba, N.Hasegawa, T.Kawati, M.Kishimoto, K.Sukegawa, K.Nagashima, K.Takiyama
    • Journal Title

      9th Int Conf.on X-ray Lasers, Beijing, China, May 24-28 (2004).

      Pages: 75-75

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Observation of Interference between Stark and Electric Quadrupole Transitions in LIF from He Atoms in Plasmas2004

    • Author(s)
      K.Takiyama, S.Namba, S.Furukawa, T.Oda, B.W.James, D.Andruczyk
    • Journal Title

      4th Int.Symp.on Plasma Polarization Spectroscopy, Kyoto, Japan, NIFS PROC 57

      Pages: 137-143

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Charge Exchange Recombination X-ray Lsser in a Cluster Plasma Produced by an Ultra-Short High Intensity Pulse Laser2004

    • Author(s)
      S.Namba, N.Hasegawa, T.Kawati, M.Kishimoto, K.Sukegawa, K.Nagashima, K.Takiyama
    • Journal Title

      9th Int Conf.on X-ray Lasers, Beijing, China, May 24-28

      Pages: 75-75

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Charge Exchange Recombination X-ray Laser in a Cluster Plasma Produced by an Ultra-Short High Intensity Pulse Laser2004

    • Author(s)
      S.Namba, N.Hasegawa, T.Kawati, M.Kishimoto, K.Sukegawa, K.Nagashima, K.Takiyama
    • Journal Title

      9th Int Conf.on X-ray Lasers, Beijing, China, May 24-28 (2004)

      Pages: 75-75

    • Related Report
      2004 Annual Research Report
  • [Journal Article] High-Sensitive LIF Measurements of Electric Field Perpendicular to Magnetic Field in Plasmas2003

    • Author(s)
      K.Takiyama, S.Namba, S.Furukawa, T.Oda, T.Ohgo, B.W.James, D.Andruczy
    • Journal Title

      Proc.11th Int.Sympo.Laser-Aided Plasma Diagnostics, Les Houch, France, Sept.29-Oct.2,2003

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Charge Exchange Recombination X-ray Laser in Non-Equilibrium Plasma due to an Interaction of Ultra-Short Pulse Laser and Cluster2003

    • Author(s)
      S.Namba, N.Hasegawa, T.Kawachi, et al.
    • Journal Title

      The 45^<th> Annual Meeting of the Division of Plasma Physics 48-7

      Pages: 197-197

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] Recombination Process of Laser Produced ZnO Plasma in a Gas Atmosphere2003

    • Author(s)
      S.Namba, R.Nodu, K.Takiyama
    • Journal Title

      30th IEEE Int.Conf.on Plasma Science Jeju, Korea, June 2-5 (2003)

      Pages: 367-367

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] A Metastable Helium Beam by a Penning Discharge for Measurement of Electric Field in Plasmas2003

    • Author(s)
      K.Takiyama, S.Namba, D.Andruczyk.B.W.James, T.Oda
    • Journal Title

      56th annual Gaseous Electronics Conference, San Francisco, CA, Oct.21-24 (2003), Bull.Amer.Phys.Soc 48-6

      Pages: 46-46

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] High-Sensitive LIF Measurements of Electric Field Perpendicular to Magnetic Field Diagnostics in Plasmas2003

    • Author(s)
      K.Takiyama, S.Namba, S.Furukawa, T.Oda, T.Ohgo, B.W.James, D.Andruczy
    • Journal Title

      Proc.11th Int.Sympo.Laser-Aided Plasma, Les Houch, France Sept.29-Oct.2

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Journal Article] A Metastable Helium Beam by a Penning Discharge for Measurement of Electric Field in Plasmas2003

    • Author(s)
      K.Takiyama, S.Namba, D.Andruczyk, B.W.James, T.Oda
    • Journal Title

      56th annual Gaseous Electronics Conference, San Francisco, CA, Oct.21-24, Bull.Amer.Phys.Soc 48-6

      Pages: 46-46

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2004 Final Research Report Summary
  • [Publications] K.Takiyama, S.Namba, S.Furukawa, T.Oda, T.Ohgo, B.W.James, D.Andruczy: "High-Sensitive LIF Measurements of Electric Field Perpendicular to Magnetic Field in Plasmas"Proc.11th Int.Sympo.Laser-Aided Plasma Diagnostics, Les Houch, France, Sept.29-Oct.2,2003. (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] S.Namba, N.Hasegawa, T.Kawachi, et al.: "Charge Exchange Recombination X-ray Laser in Non-Equilibrium Plasma due to an Interaction of Ultra-Short Pulse Laser and Cluster"The 45^<th> Annual Meeting of the Division of Plasma Physics. 48-7. 197 (2003)

    • Related Report
      2003 Annual Research Report

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Published: 2003-04-01   Modified: 2016-04-21  

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