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2007 Fiscal Year Final Research Report Summary

Development and research of transport simulation analysis of CxHy series hydrocarbon molecules in the plasma periphery

Research Project

Project/Area Number 18560794
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Nuclear fusion studies
Research InstitutionNational Institute for Fusion Science

Principal Investigator

SHOJI Mamoru  National Institute for Fusion Science, National Institute for Fusion Science, LHD projects, Assistant Professor (00280602)

Project Period (FY) 2006 – 2007
KeywordsHydroCarbon / Impurity transport / Peripheral plasma / Divertor / Image measurement / Large Helical Device
Research Abstract

It is very important to clarify the behavior of hydrocarbon molecules in the plasma periphery for aiming at future nuclear fusion reactors. We tried to measure the profile of a visible line emission (CH-band) emitted by hydrocarbon molecules. For this purpose, we installed a CCD camera with an interference filter in an outer port (7-O) in the LHD vacuum vessel in order to observe lower divertor legs in the plasma periphery and plasma-wall interactions on divertor plates installed near a lower port. The viewing angle and exposure time of the camera are fully controlled from the remote side (from the LHD control room). Using the CCD camera, we have succeeded in measuring the emission profile on the lower divertor legs in the plasma periphery and extending the important knowledge for investigating the behavior of hydrocarbon molecules in the peripheral plasma. The movement of the emission area of the CH-band from the downstream side to the upstmam side on the divertor leg was observed dur … More ing the process to radiation collapse by increasing the plasma density due to excessive gas fueling. This phenomenon can give us very important information to investigate the physical mechanism of the transport of the hydrocarbon molecules in the divertor region The investigation can contribute to clarification of the effect of the hydrocarbon molecules to the radiation collapse in LHD plasmas.
For detailed analysis of the transport of the hydrocarbon molecules in the divertor region, a three-dimensional neutral particle transport simulation code is an essential tool. We found that the parallel computing of the three-dimensional neutral particle transport simulation code is necessary for detailed analysis of the transport of the hydrocarbon molecules on the divertor legs. Thus, we tried to modify the code for the parallel computing and succeeded in shortening the computation time significantly. The database of the cross-section of the atomic and molecular process of hydrocarbon molecules has been updated. We can expect detailed analysis of the transport of the hydrocarbon molecules by combination of the updated database and the fully parallelized simulation code in the LHD plasma periphery. Less

  • Research Products

    (27 results)

All 2008 2007 2006 Other

All Journal Article (10 results) (of which Peer Reviewed: 4 results) Presentation (17 results)

  • [Journal Article] Visible Images Induced by the Three-Dimensionally Complicated Structure of the Plasma Periphery in the Large Helical Device2008

    • Author(s)
      Mamoru Shoji
    • Journal Title

      IEEE Transactions on Plasma Science 4

      Pages: 1374-1375

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Optimization of Closed Divertor Configuration for Effective Particle Control in LHD Plasmas2008

    • Author(s)
      Mamoru Shoji
    • Journal Title

      Contribution to Plasma Physics 1-3

      Pages: 185-189

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Visible Images Induced by the Three-Dimensionally Complicated Structure of the Plasma Periphery in the Large Helical Device2008

    • Author(s)
      M. Shoii, T. Watanabe
    • Journal Title

      IEEE Transactions on Plasma Science Volume 36, Issue 4

      Pages: 1374-1375

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Optimization of Closed Divertor Configuration for Effective Particle Control in LHD Plasmas2008

    • Author(s)
      M. Shoii, M. Kobayashi, S. Masuzaki, T. Watanabe, A. Iwamae, H. Yamada, A. Komori, LHD Experimental Groups
    • Journal Title

      Contribution to Plasma Physics 1-3

      Pages: 185-189

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Analyses of Visible Images of the Plasma Periphery Observed with Tangentially Viewing CCD Cameras in the Large Helical Device2007

    • Author(s)
      Mamoru Shoji
    • Journal Title

      Journal of Plasma and Fusion Research 2

      Pages: S1046

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Three-dimensional neutral particle transport simulation for analyzing polarization resolved H-alpha spectra in the large helical device2007

    • Author(s)
      Mamoru Shoji
    • Journal Title

      Journal of Nuclear Materials 363-365

      Pages: 827-832

    • Description
      「研究成果報告書概要(和文)」より
    • Peer Reviewed
  • [Journal Article] Analyses of Visible Images of the Plasma Periphery Observed with Tangentially Viewing CCD Cameras in the Large Helical Device2007

    • Author(s)
      M. SHOJI, T. WATANABE, S. MASUZAKI, H. YAMADA, A. KOMORI, LHD Experimental Groups
    • Journal Title

      Plasma and Fusion Research Volume 2

      Pages: S1046

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Three-dimensional neutral particle transport simulation for analyzing polarization resolved H-alpha spectra in the large helical device2007

    • Author(s)
      M. Shoii, A. Iwamae, M. Goto, A. Sakaue, M. Atake, S. Masuzaki, J. Miyazawa, N. Ohyabu, A. Komori, LHD Experimental Groups
    • Journal Title

      Journal of Nuclear Materials 363-365

      Pages: 827-832

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Analyses of visible images of the plasmaperiphery observed with tangentially viewing CCD cameras in the Large Helical Device2007

    • Author(s)
      M. Shoii. T. Watanabe, S. Masuzaki, H. Yamada, A Komori, LHD Experimental Groups
    • Journal Title

      Journal Plasma and Fusion Research Special Issue Volume 2

      Pages: S1046

    • Description
      「研究成果報告書概要(欧文)」より
  • [Journal Article] Study of the effect of aclosed divertor configuration on neutral particle control in the LHD plasma periphery

    • Author(s)
      M. Shoii, M. Kobayashi, S. Masuzaki, T. Watanabe, H. Yamada, A. Komori, LHD Experimental Groups
    • Journal Title

      Journal of Nuclear Materials (to be published)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] A closed divertor configuration for reduction of the heat load and efficient particle control for helical fusion reactors2008

    • Author(s)
      Mamoru Shoji
    • Organizer
      18^<th> International Toki Conference
    • Place of Presentation
      Toki-city, Japan
    • Year and Date
      20081209-20081212
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] LHD周辺プラズマの三次元構造に最適化された閉ダイバーター設計のための中性粒子輸送解析II2008

    • Author(s)
      庄司 主
    • Organizer
      第25回プラズマ・核融合学会年会
    • Place of Presentation
      栃木県宇都宮市、栃木県総合文化センター
    • Year and Date
      20081202-20081205
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Neutral particle transport analyses for closed divertor design optimized to the three-dimensional structure of the LHD plasma periphery II2008

    • Author(s)
      M. Shoii. M. Kobayashi, S. Masuzaki, H. Yamada, A. Komori, LHD Experimental Groups
    • Organizer
      25th Annual meeting of plasma science and nuclear fusion research
    • Place of Presentation
      Utsunomiya, Japan
    • Year and Date
      20081202-20081205
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Design of a closed helical divertor in LHD and the prospect for helical fusion reactors2008

    • Author(s)
      Mamoru Shoji
    • Organizer
      18th Topical Meeting on the Technology of Fusion Energy
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      20080928-20081002
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Groups, Design of a closed helical divertor in LHD and the prospect for helical fusion reactors2008

    • Author(s)
      M. Shoii. M. Kobayashi, S. Masuzaki, A. Sagara, H. Yamada, A. Komori, LHD Experimental
    • Organizer
      18th Topical Meeting on the Technology of Fusion Energy
    • Place of Presentation
      San Francisco, USA
    • Year and Date
      20080928-20081002
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Study of the effect of a closed divertor configuration on neutral particle control in the LHD plasma periphery2008

    • Author(s)
      Mamoru Shoji
    • Organizer
      18th International Conference on Plasma Surface Interactions
    • Place of Presentation
      Toledo, Spain
    • Year and Date
      20080526-20080530
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] LHD周辺プラズマの三次元構造に最適化された閉ダイバーター設計のための中性粒子輸送解析2007

    • Author(s)
      庄司 主
    • Organizer
      第24回プラズマ・核融合学会年会
    • Place of Presentation
      兵庫県姫路市、イーグレひめじ
    • Year and Date
      20071127-20071130
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Neutral particle transport analyses for closed divertor design optimized to the three-dimensional structure of the LHD plasma periphery2007

    • Author(s)
      M. Shoii. M. Kobayashi, S. Masuzaki, H. Yamada, A. Komori
    • Organizer
      24th Annual meeting of plasma science and nuclear fusion research
    • Place of Presentation
      Himegi, Japan
    • Year and Date
      20071127-20071130
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Optimization of a closed divertor configuration for three dimensionally complicated magnetic structure in the LHD plasma periphery2007

    • Author(s)
      Mamoru Shoji
    • Organizer
      17th International Toki Conference and 16th International Stellarator/Heliotron Workshop
    • Place of Presentation
      Toki-city, Japan
    • Year and Date
      20071015-20071019
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Optimization of a closed divertor configuration for three dimensionally complicated magnetic structure in the LHD plasma periphery2007

    • Author(s)
      M. Shoii. M. Kobayashi, S. Masuzaki, A. Iwamae, T. Watanabe, H. Yamada, A. Komori, LHD Experimental Group
    • Organizer
      17th International Toki Conference and 16th International Stellarator/Heliotron Workshop
    • Place of Presentation
      Tokicity, Japan
    • Year and Date
      20071015-20071019
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Optimization of Closed Divertor Configuration for Effective Partide Control in LHD Plasmas2007

    • Author(s)
      Mamoru Shoji
    • Organizer
      11th International Workshop on Plasma Edge Theory in Fusion Devices
    • Place of Presentation
      Takayama, Japan
    • Year and Date
      20070523-20070525
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Optimization of Closed Divertor Configuration for Effective Particle Control in LHD Plasmas2007

    • Author(s)
      M. Shoii. M. Kobayashi, S. Masuzaki, T. Watanabe, A. Iwamae, H. Yamada, A. Komori, LHD Experimental Groups
    • Organizer
      11th International Workshop on Plasma Edge Theory in Fusion Devices
    • Place of Presentation
      Takayama, Japan
    • Year and Date
      20070323-20070325
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] Analyses of visible images of the plasma periphery observed with tangentially viewing CCD cameras in the large helical device2006

    • Author(s)
      Mamoru Shoji
    • Organizer
      16th International Toki Conference
    • Place of Presentation
      Toki City, Japan
    • Year and Date
      20061205-20061208
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Analyses of visible images of the plasma periphery observed with tangentially viewing CCD cameras in the large helical device2006

    • Author(s)
      M. Shoii. T. Watanabe, S. Masuzaki, H. Yamada, A. Komori, LHD Experimental Groups
    • Organizer
      16th International Toki Conference on Advanced Imaging and Plasma Diagnostics
    • Place of Presentation
      Toki City, Japan
    • Year and Date
      20061205-20061208
    • Description
      「研究成果報告書概要(欧文)」より
  • [Presentation] LHDにおける閉ダイバーター最適化設計のための中性粒子輸送解析2006

    • Author(s)
      庄司 主
    • Organizer
      第23回プラズフ・核融合学会年会
    • Place of Presentation
      茨城県つくば市、筑波大学
    • Year and Date
      20061128-20061201
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Three-dimensional neutral particle transport simulation for analyzing polarization resolved H-alpha spectra in the Large Helical Device2006

    • Author(s)
      Mamoru Shoji
    • Organizer
      17th International Conference on Plasma Surface Interactions
    • Place of Presentation
      Hefei, China
    • Year and Date
      20060522-20060526
    • Description
      「研究成果報告書概要(和文)」より
  • [Presentation] Three-dimensional neutral particle transport simulation for analyzing polarization resolved H-alpha spectra in the Large Helical Device

    • Author(s)
      M. Shoii. A. Iwamae, M. Goto, A. Sakaue, M. Atake, S. Masuzaki, J. Miyazawa, N. Ohyabu, A. Komori, LHD Experimental Groups
    • Organizer
      17th International Conference on Plasma Surface Interactions
    • Place of Presentation
      Hefei, China
    • Year and Date
      00000322-00000326
    • Description
      「研究成果報告書概要(欧文)」より

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Published: 2010-06-09  

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