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Particles Confinement Properties in Low Aspect Ratio L=1 Helical Systems.

Research Project

Project/Area Number 17560733
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

AIZAWA Masamitsu  Nihon University, College of Science and Technology, Professor, 理工学部, 教授 (10150898)

Project Period (FY) 2005 – 2006
Project Status Completed (Fiscal Year 2006)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 2006: ¥900,000 (Direct Cost: ¥900,000)
Fiscal Year 2005: ¥2,100,000 (Direct Cost: ¥2,100,000)
KeywordsPlasma / Nuclear Fusion / Helical Systems / Particle Confinement / Low Aspect Ratio
Research Abstract

The L=1 helical axis systems applying the control methods of effective toroidal curvature term defined as the sum of usual toroidal curvature term and one of the nearest satellite harmonics of helical field term, have been studied to improve particles confinement properties. If we consider a compact system, a small period number N and low aspect ratio system is desirable. In generally, particles transport properties of compact system become worse due to usual toroidal effect. We have been studied by the same methods described in our paper, and we have improved particles transport by controlling the effective curvature term. It has been found that improving of particle confinement has observed, and the optimal structure of magnetic field in case of low aspect ratio case has been discussed. The transport properties of small N systems will be worse than that in the larger N systems. But, the magnetic well control is comparatively easy and device becomes compact. So, we have investigated the collisionless test particles confinement and velocity space loss region for the four type devices. The maximum test particles energy is set at 10KeV. We can see that the particle confinement becomes worse in low N ( low coil aspect ratio) case as expected. But, the low N case, especially N=5 case, the particle confinement is influenced by the pitch modulation parameter a^* and shows that the transport of a^* =-0.2 case is improved confinement properties. These results are consistent with the neo-classical theory. On the other hand, the high aspect ratio cases show that the efficiency of improvement is not so large in our particle tracing calculation.

Report

(3 results)
  • 2006 Annual Research Report   Final Research Report Summary
  • 2005 Annual Research Report
  • Research Products

    (15 results)

All 2007 2006 2005

All Journal Article (15 results)

  • [Journal Article] Particle Transport and Magnetic field Properties in Low Aspect Ratio L=1 Helical Systems2007

    • Author(s)
      M.Aizawa, A.Aiyilaiti, S.Shiina
    • Journal Title

      ECA(Europhysics Conference Abstract)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Improvement of Particle Transport Properties in Low Aspect Ratio L=1 Helical Systems2006

    • Author(s)
      M.Aizawa, A.Aiyilaiti, S.Shimizu, S.Shiina
    • Journal Title

      ECA(Europhysics Conference Abstract) Vol.301

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Improvement of Particle Transport Properties in Low Aspect Ratio L=1 Helical Systems2006

    • Author(s)
      M.Aizawa, A.Aiyilaiti, S.Shimizu, S.Shiina
    • Journal Title

      ECA(Europhysics Conference Abstract) Vol.30I P-4.142

      Pages: 1-4

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Improvement of Particle Transport Properties in Low Aspect Ratio L=1 Helical Systems2006

    • Author(s)
      M.Aizawa, A.Aiyilaiti, S.Shimizu, S.Shiina
    • Journal Title

      ECA (Europhysics Conference Abstract) Vol. 30I

    • Related Report
      2006 Annual Research Report
  • [Journal Article] Transport Properties of Low Aspect Ratio L=1 Helical Systems2005

    • Author(s)
      M.Aizawa, S.Shimizu, A.Aiyilaiti, S.Shiina
    • Journal Title

      ECA(Europhysics Conference Abstract) Vol.29C

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Relaxed State of Reversed Field Pinch Equilibrium with Low Aspect Ratio2005

    • Author(s)
      S.Shiina, Y.Nagamine, M.Aizawa et al.
    • Journal Title

      ECA(Europhysics Conference Abstract) Vol.29C

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Neoclassical reversed-field pinch equilibrium with dominant self-induced plasma current2005

    • Author(s)
      S.Shiina, Y.Nagamine, M.Taguchi, M.Aizawa et al.
    • Journal Title

      Physics of Plasma Vol.12

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary 2005 Annual Research Report
  • [Journal Article] Steady-State Approach to Low-Aspect-Ratio Reversed-Field Pinch Nuclear Fusion Reactor2005

    • Author(s)
      S.Shiina, Y.Yagi, H.Sugimoto, H.Asida, Y.Hirano, H.Koguchi, H.Sakakita, M.Taguchi, Y.Nagamine, M.Aizawa et al.
    • Journal Title

      J. Plasma Fusion Res. Vol.18

      Pages: 932-943

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Transport Properties of Low Aspect Ratio L=1 Helical Systems2005

    • Author(s)
      M.Aizawa, S.Shimizu, A.Aiyilaiti, S.Shiina
    • Journal Title

      ECA(Europhysics Conference Abstract) Vol.29C P-1.041

      Pages: 1-4

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Relaxed State of Reversed Field Pinch Equilibrium with Low Aspect Ratio2005

    • Author(s)
      S.Shiina, Y.Nagamine, M.Aizawa, et al.
    • Journal Title

      ECA(Europhysics Conference Abstract) Vol.29C P-2.056

      Pages: 1-4

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Neoclassical reversed-field pinch equilibrium with dominant self-induced plasma current2005

    • Author(s)
      S.Shiina, Y.Nagamine, M.Taguchi, M.Aizawa, et al.
    • Journal Title

      Physics of Plasma Vol.12 080702

      Pages: 1-4

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Steady-State Approach to Low-Aspect-Ratio Reversed-Field Pinch Nuclear Fusion Reactor2005

    • Author(s)
      S.Shiina, Y.Yagi, H.Sugimoto, H.Asida, Y.Hirano, H.Koguchi, H.Sakakita, M.Taguchi, Y.Nagamine, M.Aizawa et al.
    • Journal Title

      J. Plasma Fusion Res. Vol.81

      Pages: 932-943

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2006 Final Research Report Summary
  • [Journal Article] Transport Properties of Low Aspect Ratio L=1 Helical Systems2005

    • Author(s)
      M.Aizawa, S.Shimizum A.Aiyilaiti, S.Shiina
    • Journal Title

      ECA (Europhysics Conference Abstract) Vol.29C

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Relaxed State of Reversed Field Pinch Equilibrium with Low Aspect Ratio2005

    • Author(s)
      S.Shiina, Y.Nagamine, M.Aizawa et al.
    • Journal Title

      ECA (Europhysics Conference Abstract) Vol.29C

    • Related Report
      2005 Annual Research Report
  • [Journal Article] Steady-State Approach to Low-Aspect-Ratio Reversed-Field Pinch Nuclear Fusion Reactor2005

    • Author(s)
      S.Shiina, Y.Yagi, H.Sugimoto, H.Asida, Y.Hirano, H.Koguchi, H.Sakakita, M.Taguchi, Y.Nagamine, M.Aizawa et al.
    • Journal Title

      J.Plasma Fusion Res. Vol.81,No.11

      Pages: 932-943

    • Related Report
      2005 Annual Research Report

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Published: 2005-04-01   Modified: 2016-04-21  

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