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Controlled Experiment of Relaxation Processes of Many-Particle System Using Strongly Magnetized Nonneutral Plasma

Research Project

Project/Area Number 13308021
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field プラズマ理工学
Research InstitutionKyoto University

Principal Investigator

KIWAMOTO Yasuhito  Kyoto University, Graduate School of Human and Environmental Studies, Prof., 大学院・人間・環境学研究科, 教授 (50018040)

Co-Investigator(Kenkyū-buntansha) ABE Sumiyoshi  University of Tsukuba, Institute of Physics, Associate Prof., 物理学系, 助教授 (70184215)
HAYAKAWA Hisao  Kyoto University, Graduate School of Science, Associate Prof., 大学院・理学研究科, 助教授 (90222223)
TANAKA Hitoshi  Kyoto University, Graduate School of Energy Science, Associate Prof., 大学院・エネルギー科学研究科, 助教授 (90183863)
MICHISHITA Toshinori  Kyoto University, Graduate School of Human and Environmental Studies, Res. Ass., 大学院・人間・環境学研究科, 助手 (00166050)
YUYAMA Tetsumori  Kyoto University, Graduate School of Human and Environmental Studies, Res. Ass, 大学院・人間・環境学研究科, 助手 (90026815)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥50,050,000 (Direct Cost: ¥38,500,000、Indirect Cost: ¥11,550,000)
Fiscal Year 2003: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2002: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2001: ¥36,920,000 (Direct Cost: ¥28,400,000、Indirect Cost: ¥8,520,000)
KeywordsPure electron plasma / Nonneutral plasma / Vortex dynamics / Self-organization / Relaxation of many-particle system with long-range force / Thermal equilibrium plasma
Research Abstract

Collective interactions among particles of strongly magnetized pure electron plasma appear as vortex motion. The phenomena that string-shaped high-density groups (clumps) of electrons form highly symmetric arrays have been coined "vortex crystal formation" and attracting much attention as a representative example of self-organization processes. In spite of high academic curiosity, the physical mechanism leading to the ordered states is far from full understanding. The purpose of this project is to physically explore each stage of the self-organization process on one hand and to build an instrumental and methodical basis for next generation of experimental studies by employing strong magnetic field on the other.
Major steps toward physical understanding consist of three achievements : (1) Bifurcation between merger and closely-separated states of clumps is found to critically depend on the depth and width of the depletion belt self-generated in the background distribution between the clu … More mps. [Soga, Phys. Plasmas 2003] (2) The background populations curb the clumps' orbital motion, guide them to symmetric configurations and eventually keep them at the crystal lattice. [Sanpei, Phys. Rev. E (2003)] (3) Application of a rotating wave field to a distribution of magnetized electrons leads to a substantial compression of the density distribution when the dispersion of the wave satisfies the radical boundary conditions imposed by the conducting wall and the plasma density profile. However the matching condition includes self-adjustment of the density profile and resonance broadening, suggesting another type of self-organization of the plasma coupled with external fields. [Soga, JPFR-SR6 2004]
A new plasma trap operatable with strong magnetic filed up to 2.2T is constructed together with the installation of a newly developed optical transfer system for observation of fine structures in the electron density distribution from a weal magnetic field zone.[Aoki, JJAP 2004] It has been successfully observed that finer structures are generated under the higher magnetic field. The Malmberg trap configuration, best suited to vortex experiments, has not shown confinement time longer than 200s. The Mohri trap configuration, suited to generate Penning type equilibria, has led to the confinement time exceeding500s. The long confinement time is the basis for the advanced study of relaxation toward equilibrium or transition between equilibrium states. This program has successfully prepared the starting point for the next generation of experimental studies of relaxation. Less

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (35 results)

All Other

All Publications (35 results)

  • [Publications] Y.Kiwamoto, A.Mohri, M.Fujiwara: "Equilibrium Density Distribution of a Two-Species Plasma with a Single Sign of Charge"J.Phys.Soc.Jpn.. Vol.73,No.1. 102-106 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 際本泰士: "非中性プラズマ科学への期待"プラズマ・核融合学会誌. Vol.79,No.12. 1249-1258 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Soga, Y.Kiwamoto, A.Sanpei, J.Aoki: "Merger and binary structure formation of two discrete vortices in a background vorticity distribution of a pure electron plasma"Phys.Plasmas. Vol.10,No.10. 3922-3926 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Akio Sanpei, Y.Kiwamoto, K.Ito, Y.Soga: "Formation of a Vortex Crystal Cell Assisted by a Background Vorticity Distribution"Phys.Rev.E.. Vol.68No.1-2. 016404 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Yatsuyanagi, Y.Kiwamoto, T.Ebisuzaki, T.Hatori, T.Kato: "Simulations of diocotron instability using a special-purpose computer, MDGRAPE-2"Phys.Plasmas. Vol.10,No.8. 3188-3195 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Kiwamoto, A.Sanpei, Y.Soga, J.Aoki, Y.Yatsuyanagi, T.Ozawa: "Critical Contribution of Low-Density Background Particles in the Formation of Ordered Structures in a Pure Electron Plasma"J.Plasma and Fusion Research SERIES. Vol.6. 8 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 際本泰士: "「プラズマの生成と診断」の中で7・3節「非中性プラズマ」を分担(プラズマ核融合学会編)"コロナ社. 433-440 (2004)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Kiwamoto, A.Mohri, M.Fvjiwara: "Equilibrium Density Distribution of a Two-Species Plasma with a Single Sign of Charge"J.Phys.Soc.Jpn.. 73, No.1. 102-106 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Kiwamoto: "What we can do with nonneutral plasma (in Japanese)"J.Plasma Phys.Fusion Res.. 79, No.12. 1249-1258 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Soga, Y.Kiwamoto, A.Sanpei, J.Aoki: "Merger and binary structure formation of two discrete vortices in a background vorticity distribution of a pure electron plasma"Physics of Plasmas. 10, No.10. 3922-3926 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] A.Sanpei, Y.Kiwamoto, K.Ito, Y.Soga: "Formation of a Vortex Crystal Cell Assisted by a Background Vorticity Distribution"Physical Review E. 68, No.1-2. 016404

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Yatsuyanagi, Y.Kiwamoto, T.Ebisuzaki, T.Hatori, T.Iato: "Simulations of diocotron instability using a special-purpose computer, MDGRAPE-2"Physics of Plasmas. 10, No.8. 3188-3195 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Kiwamoto, A.Sanpei, Y.Soga, J.Aoki, Y.Yatsuyanagi, T.Ozawa: "Critical Contribution of Low-Density Background Particles in the Formation of Ordered Structures in a Pure Electron Plasma"to be pubhshed, J.Plasma Phys.Fusion Res.. SERIES 6. (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Kiwamoto: ""Nonsutral Plasma", in Sec 7.3 of the monograph Production and Diagnostics of Plasma"Corona-sha, The Japanese Society of Plasma Science and Nuclear Fusion Research. 433-440 (2004)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Y.Kiwamoto, A.Mohri, M.Fujiwara: "Equilibrium Density Distribution of a Two-Species Plasma with a Single Sign of Charge"J.Phys.Soc.Jpn.. Vol.73,No.1. 102-106 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 際本泰士: "非中性プラズマ科学への期待"プラズマ・核融合学会誌. Vol.79,No12. 1249-1258 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Soga, Y.Kiwamoto, A.Sanpei, J.Aoki: "Merger and binary structure formation of two discrete vortices in a background vorticity distribution of a pure electron plasma"Phys.Plasmas. Vol.10,No.10. 3922-3926 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Akio Sanpei, Y.Kiwamoto, K.Ito, Y.Soga: "Formation of a Vortex Crystal Cell Assisted by a Background Vorticity Distribution"Phys.Rev.E.. Vol.68,No.1-2. 016404 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Yatsuyanagi, Y.Kiwamoto, T.Ebisuzaki, T.Hatori, T.Kato: "Simulations of diocotron instability using a special-purpose computer, MDGRAPE-2"Phys.Plasmas. Vol.10,No.8. 3188-3195 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Kiwamoto, A.Sanpei, Y.Soga, J.Aoki, Y.Yatsuyanagi, T.Ozawa: "Critical Contribution of Low-Density Background Particles in the Formation of Ordered Structures in a Pure Electron Plasma"J.Plasma and Fusion Research SERIES. Vol.6. (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] 際本泰士: "「プラズマの生成と診断」の中で7・3節「非中性プラズマ」を分担"コロナ社(プラズマ核融合学会編). 433-440 (2004)

    • Related Report
      2003 Annual Research Report
  • [Publications] Y.Kiwamoto, K.Ito, A.Sanpei, Y.Soga: "Strong Effects of Background Vorticity Distribution on the Dynamics of Coherent Vortices in Electron Plasma"Physica Scripta. T98. 34-37 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Kiwamoto, K.Ito, A.Sanpei, Y.Soga, T.Yuyama, T.Michishita: "Interaction of Electron Vortices under Strong Influence of Background Vorticity Distribution"Non-Neutral Plasma Physics IV (AIP Press, ISBN 0-7354-0050-4). 464-473 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] K.Ito, A.Sanpei, Y.Kiwamoto: "Electron Vortex Dynamics and Two-Dimensional Field Analysis"Non-Neutral Plasma Physics IV (AIP Press, ISBN 0-7354-0050-4). 474-479 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] A.Sanpei, K.Ito, Y.Soga, Y.Kiwamoto: "Characteristics and Generation Mechanism of Holes in an Extended Vortex"Non-Neutral Plasma Physics IV (AIP Press, ISBN 0-7354-0050-4). 480-485 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Y.Kiwamoto, K.Ito, A.Sanpei, Y.Soga: "Bifurcation in the Evolution of Vortex Structure in a Magnetized Pure Electron Plasma"Bifurcation Phenomena in Plasmas (Kyushu University Press ISBN 4-9901142-5-6). 114-127 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 際本泰士: "非中性プラズマ中の渦運動"日本物理学会誌. 56・4. 253-261 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 際本泰士: "非中性プラズマの渦"プラズマ・核融合学会誌. 77・4. 338-347 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Kite, Y.Kiwamoto, A.Sanpei: "Field Analysis of Two Dimensional Dynamics of Non-neutral Plasma by Imaging Diagnostics and Examination by Sector Probing"Jpn. J. Applied Physics. Vol.40 No.4A. 2558-2565 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Sanpei, Y.Kiwamoto, K.Ito: "Generation of Vorticity Holes Surrounding a Point Vortex in a Nonneutral Plasma"J. Phys. Soc. Jpn., (Lett.). Vol.70, No.10. 2813-2816 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Kiwamoto, K.Ito, A.Sanpei, Y.Soga: "Strong Effects of Background Vorticity Distribution on the Dynamics of Coherent Vortices in Electron Plasma"Invited Talk at International Topical Conference on Plasma Physicsheld at Univ. Algarve, Faro, Portugal on 3-7 September, 2001;to be published in Physica Scripta. 10 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Kiwamoto, K.Ito, A.Sanpei, Y.Soga, T.Yuyama, T.Michishita: "Interaction of Electron Vortices under Strong Influence of Background Vorticity Distribution"Invited Talk, at 2001 Workshop on Non-Neutral Plasmas held at UCSD, July 30-Aug 2, 2001. published in Non-Neutral Plasma Physics IV (AIP Press). 464-473 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] A.Sanpei, K.Ito, Y.Soga, Y.Kiwamoto: "Characteristics and Generation Mechanism of Holes in an Extended Vortex"Presented at 2001 Workshop on Non-Neutral Plasmas held at UCSD, July 30-Aug 2, 2001. published in Non-Neutral Plasma Physics IV (AIP Press). 480-485 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Y.Kiwamoto, K.Ito, A.Sanpei, Y.Soga: "Bifurcation in the Evolution of Vortex Structure in a Magnetized Pure Electron Plasma"Invited Talk at the International Workshop on Bifurcation Phenomena in Plasmas, held at Fukuoka on Dec. 2-5, 2001;to be published in a monograph from Elsevier Science. 13 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 際本泰士: "非中性プラズマで明らかにされる渦のダイナミクス"パリティ(「物理化学この1年」特集号にニュースとして選出された). Vol.17, No.1. 12-14 (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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