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2008 Fiscal Year Final Research Report

synergistic irradiation effects of laser pulses and plasmas to the materials with high melting point

Research Project

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Project/Area Number 19860090
Research Category

Grant-in-Aid for Young Scientists (Start-up)

Allocation TypeSingle-year Grants
Research Field Nuclear fusion studies
Research InstitutionNagoya University (2008)
Japan Atomic Energy Agency (2007)

Principal Investigator

KAJITA Shin  Nagoya University, エコトピア科学研究所, 講師 (00455297)

Project Period (FY) 2007 – 2008
Keywordsヘリウム損傷 / 金属ミラー / 間欠的熱負荷 / プラズマ照射 / 複合照射効果 / 核融合プラズマ / レーザーアブレーション
Research Abstract

ダイバータ模擬装置NAGDIS-II(名古屋大学)において、タングステンへのヘリウム照射を行った. He-NeレーザーとPin-Photodiodeを組み合わせ、in situでの反射率計測機器を構築し、プラズマ照射に伴うタングステンの反射率変化を調べた. ナノ秒レーザー及びサブミリ秒レーザーを用いたアブレーションを、高速カメラとフィルタを組み合わせたフィルタ分光法を用いて調べた. プラズマとレーザーの複合照射によりアブレーション閾値が著しく減少することが明らかになった.

  • Research Products

    (12 results)

All 2009 2008 2007 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (7 results)

  • [Journal Article] Prompt ignition of a unipolar arc on helium irradiated tungsten2009

    • Author(s)
      Shin Kajita, Shuichi Takamura, Noriyasu Ohno
    • Journal Title

      Nuclear Fusion Vol. 49

      Pages: 032002(4)

    • Peer Reviewed
  • [Journal Article] Visualized Blow-off from helium irradiated tungsten in response to ELM-like heat load2009

    • Author(s)
      Shin Kajita, Noriyasu Ohno, Wataru Sakaguchi, Makoto Takagi
    • Journal Title

      Plasma and Fusion Research Vol.4

      Pages: 004(6)

    • Peer Reviewed
  • [Journal Article] Plasma-assisted laser ablation of tungsten : Reduction in ablation power threshold due to bursting of holes/bubbles2007

    • Author(s)
      Shin Kajita, Noriyasu Ohno, Shuichi Takumura, Wataru Sakaguchi, Dai Nishijima
    • Journal Title

      Applied Physics Letters Vol. 91

      Pages: 261501(3)

    • Peer Reviewed
  • [Journal Article] Formation and mitigation of fiberform nanostructured tungsten by helium and sub-ms laser pulse irradiations

    • Author(s)
      Shin Kajita, Wataru Sakaguchi, Noriyasu Ohno
    • Journal Title

      Plasma Devices and Operations (in press)

    • Peer Reviewed
  • [Journal Article] In situ reflectivity of tungsten mirrors under helium plasma exposure

    • Author(s)
      Wataru Sakaguchi, Shin Kajita, Noriyasu Ohno, Makoto Takagi
    • Journal Title

      Journal of Nuclear Materials (in press)

    • Peer Reviewed
  • [Presentation] タングステンへのレーザーとヘリウムプラズマの照射効果プラズマ科学シンポジウム20092009

    • Author(s)
      梶田信、大野哲靖、坂口亙
    • Organizer
      第26回プラズマプロセシング研究会
    • Place of Presentation
      名古屋
    • Year and Date
      2009-02-03
  • [Presentation] Formation condition of fiberform nanostructured tungsten by helium plasma irradiation2009

    • Author(s)
      W.Sakaguchi, S.Kajita, N.Ohno, M.Takagi
    • Organizer
      IC-PLANTS 2009
    • Place of Presentation
      Nagoya, Japan
    • Year and Date
      2009-01-23
  • [Presentation] ヘリウムプラズマ照射によるタングステンナノ構造の形成条件2008

    • Author(s)
      坂口亙、梶田信、大野哲靖、高木誠
    • Organizer
      第25回プラズマ・核融合学会年会
    • Place of Presentation
      宇都宮
    • Year and Date
      2008-12-05
  • [Presentation] タングステンへのプラズマ・レーザー複合照射効2008

    • Author(s)
      梶田信、大野哲靖、坂口亙
    • Organizer
      第25回プラズマ・核融合学会年会
    • Place of Presentation
      宇都宮
    • Year and Date
      2008-12-02
  • [Presentation] Irradiation Effects of helium and laser on in-vessel mirror material2008

    • Author(s)
      S. Kajita
    • Organizer
      International Workshop on Microwave-Laser diagnostics and particle-Mirror interaction for burning plasma experiment
    • Place of Presentation
      Shikano-shima, Japa
    • Year and Date
      2008-09-13
  • [Presentation] Spectroscopy Study of High Z Material Ablation Phenomena under Helium Plasma Exposure2008

    • Author(s)
      W.Sakaguchi, S.Kajita, N.Ohno, M.Takagi
    • Organizer
      18th PSI Conference
    • Place of Presentation
      Toledo, Spain
    • Year and Date
      2008-05-29
  • [Presentation] ヘリウムプラズマ照射下における高Z材のアブレーション現象の観測2008

    • Author(s)
      坂口 亙、梶田 信、大野哲靖、高木 誠
    • Organizer
      電気学会全国大会
    • Place of Presentation
      福岡工業大学
    • Year and Date
      2008-03-21

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Published: 2010-06-10   Modified: 2016-04-21  

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