• Search Research Projects
  • Search Researchers
  • How to Use
  1. Back to project page

2007 Fiscal Year Final Research Report Summary

Research of aerosol formation of liquid wall laser fusion reactor by electrical discharge method

Research Project

Project/Area Number 18560792
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

NORIMATSU Takayoshi  Osaka University, Institute of Laser Engineering, Professor (50135753)

Co-Investigator(Kenkyū-buntansha) NAKAI Mitsuo  Osaka University, Institute of Laser Engineering, Associate professor (70201663)
FURUKAWA Hiroyuki  Osaka University, Researcher (70222271)
NAGATOMO Hideo  Osaka University, Nagatomo Institute of Laser Engineering, Associate professor (10283813)
Project Period (FY) 2006 – 2007
Keywordslaser fusion liouid wall reactor / ablation / aerosol
Research Abstract

In a future laser fusion reactor with a liquid first wall, the surface of the liquid wall (LiPb) will be ablated with alpha particles from fusion burns. Ablated metal make a planer plume that concicts of aerosols (nano-scale particles) and atomic vapor. They finally condense on the other side of the reactor chamber but behavior of the aerosols would not follow hydrodynamic description of ablated metal. To make a data base to discus formation of the aerosols, we experimentally simulated this phenomena using discharge heating of a 10-mcrometer-thick, Pb membrane deposited on a glass plate. The-10-micrometer-thick membrane coresponds to the ablated portion within Bragg peak and the glass plate corresponds to the remaining liquid metal.
The 5 x 10 x 0.01 mm Pb membrane was heated by a 300J electric pulse stored in a capacitor. The ablated plume was captured on a witness plate located at different distance from the membrane. Captured materials were observed using a scanning electron microsco … More pe and the average thickness was measured nondestructively using an x-ray stimulated fluorescent thickness meter. In our experiment, the areal energy density consumed in the Pb membrane was similar to that of alpha particle (0.2MJ/m^2) but the heating time was 100 times longer that that by alpha heating (0.1 micro second).
We successfully captured the aerosols on the witness plate when the distance between the membrane and the witness plate is more than 20 mm. We found that leading portion of ablated plume deposited on the witness plate as a continuous metal membrane and trailing potion of the plume deposited as micro-particles on the membrane. The average diameter of aerosols was 30 micrometer. If the distance was less than this value, the diameter of captured aerosols became larger due to geometrical confinement effect of vapor between the source and the witness plate. This result agrees with a theoretical model based on the Luk'yanchuk's model. Our model analysis said that the leading portion of the plume is something like a super-cooled vapor, which makes continuous membrane when it collide with the witness plate. Less

  • Research Products

    (10 results)

All 2007

All Journal Article (2 results) (of which Peer Reviewed: 1 results) Presentation (8 results)

  • [Journal Article] Conceptual Design of Fast Ignition Power Plant KOYO-F Driven by Cooled YB: YAG Ceramic Laser2007

    • Author(s)
      T. Norimatsu
    • Journal Title

      Fusion Science Technology 52

      Pages: 892-900

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Conceptual Design of Fast Ignition Power Plant KOYO-F Driven by Cooled YB : YAG Ceramic Laser2007

    • Author(s)
      T., Norimatsu
    • Journal Title

      Fusion Science Technology 52

      Pages: 892-900

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] レーザー核融合炉チェンバー液体壁のアブレーションプルームのダイナミクス2007

    • Author(s)
      古河裕之
    • Organizer
      物理学会
    • Place of Presentation
      北海道大学
    • Year and Date
      20070921-24
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Dynamics of ablated plume from liquid wall of Laser fusion reactor2007

    • Author(s)
      H., Furukawa
    • Organizer
      Physical society of Japan
    • Place of Presentation
      Sapporo, Japan
    • Year and Date
      20070921-24
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] レーザー核融合炉チェンバー液体壁のアブレーションプルームの評価2007

    • Author(s)
      古河裕之
    • Organizer
      プラズマ核融合学会
    • Place of Presentation
      イーグレ姫路
    • Year and Date
      2007-11-28
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Analysis of ablation plume from liquid wall of Laser fusion reactor2007

    • Author(s)
      H., Furukawa
    • Organizer
      Japanese Society of Plasma and Fusion Research
    • Place of Presentation
      Himeji,Japan
    • Year and Date
      2007-11-28
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Experimental Investigation of Aerosol Formation in Laser Fusion Reactor Chamber by Discharge Method2007

    • Author(s)
      Takashi Ohshige
    • Organizer
      Fifth International Conference on Inertial Fusion Science and Applications
    • Place of Presentation
      神戸国際会議場
    • Year and Date
      2007-09-13
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Study on dynamics of ablation plums produced by fusion products in laser fusion liquid wall chamber2007

    • Author(s)
      H. Furukawa,
    • Organizer
      Fifth International Conference on Inertial Fusion Science and Applications
    • Place of Presentation
      Seoul National University
    • Year and Date
      2007-09-13
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Experimental Investigation of Aerosol Formation in Laser Fusion Reactor Chamber by Discharge Method2007

    • Author(s)
      Takashi, Ohshige
    • Organizer
      Fifth International Conference on Inertial Fusion Science and Applications
    • Place of Presentation
      Kobe
    • Year and Date
      2007-09-13
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Study on dynamics of ablation plums produced by fusion products in laser fusion liquid wall chamber2007

    • Author(s)
      H., Furukawa
    • Organizer
      Fifth International Conference on Inertial Fusion Science and Applications
    • Place of Presentation
      Kobe
    • Year and Date
      2007-09-13
    • Description
      「研究成果報告書概要(欧文)」より

URL: 

Published: 2010-02-04  

Information User Guide FAQ News Terms of Use Attribution of KAKENHI

Powered by NII kakenhi