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Study on Structural Change of Coulomb Crystals in Plasmas

Research Project

Project/Area Number 09680464
Research Category

Grant-in-Aid for Scientific Research (C)

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

Principal Investigator

HAYASHI Yasuaki  Kyoto Institute of Technology, Faculty of Engineering and Design, Associate Professor, 工芸学部, 助教授 (30243116)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥3,400,000 (Direct Cost: ¥3,400,000)
Fiscal Year 1998: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1997: ¥2,700,000 (Direct Cost: ¥2,700,000)
KeywordsCoulomb Crystal / Fine-Particle / Fine-Particle Plasma / Mie Scattering / Ellipsometry / Crystal Structure / Phase Transition / Radiation Pressure / ミ-散乱
Research Abstract

Structural change of Coulomb crystals, which were formed by growing carbon particles in a methane plasma, have been analyzed with the use of 2 CCD video cameras and Mie-scattering ellipsometry. Three dimensional structures of the crystals were observed from the top and the side at the same time and at the same position. As a result, it has been understood that the structure was three-dimensional like face-centered or body-centered for smaller particles (1.2-1.5 mu m) while two-dimensional of simple hexagonal one for larger particles (>1.8 mu m). It has bee also found that the three-dimensional crystal once became in the liquid phase before changing to two-dimensional one and that transition to three-dimensional structure occurred from the lower region while the particle alignment , 1. e., transition to two-dimensional one from the upper.
The three-dimensional structure of a three-dimensional Coulomb crystal was precisely analyzed and proved to be strictly face-centered orthorohmbic. It was understood that the structure was formed from the slip of (111) plane of a face-centered cubic structure and the reconstruction of particles for minimum Coulomb energy in the plane.
The force of aligning particles in the direction perpendicular to an electrode in the two-dimensional Coulomb crystal was investigated by the application of radiation pressure or photophoretic force of laser light and the decrease of particle density. Consequently it has been found that the particle alignment is caused by the resultant of an attractive and the Coulomb repulsive forces.

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (22 results)

All Other

All Publications (22 results)

  • [Publications] Y.Hayashi: "Structure Changes of Coulomb Crystals in a Fine-Particle Plasma" Jpn.J.Appl.Phys.36. 4976-4979 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 林康明: "強結合ダストプラズマの結晶化と遷移" プラズマ・核融合学会誌. 73. 1230-1234 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 林康明: "プラズマ中のダスト挙動の解析とクーロン結晶の形成" 真空. 41. 782-789 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 林康明: "グロー放電プラズマ中での微粒子成長とクーロン結晶の形成" エアロゾル研究. 13. 209-214 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Takahashi: "Analyses of attractive forces between particles in Coulomb crystal of dusty plasmas by optical manipulations" Phys.Rev.E. 58. 7805-7811 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Takahashi: "Simple Hexagonal Coulomb Crystal near a Deformed Plasma Sheath Boundary in a Dusty Plasma" Jpn.J.Appl.Phys.37. 6609-6614 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Hayashi: "Strongly Coupled Coulomb Systems" Plenum Press, 4 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Hayashi and K.Takahashi: "Structure Changes of Coulomb Crystals in a Fine-Particle Plasma" Jpn.J.Appl.Phys.36 (7B). 4976-4979 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Hayashi: "Crystallization and Transition on Strongly Coupled Dusty Plasmas" J.Plasma Fusion Res.73 (11). 1230-1234 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Hayashi, K.Takahashi and H.Sato: "Analyses of Particle Behaviors and Formation of Coulomb Crystals in Plasmas" J.Vac.Soc.Jpn.41 (9). 782-789 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Hayashi: "Growth of Fine-Particles and Formation of Coulomb Crystals Glow Discharge Plasmas" J.Aerosol Res.Jpn.13 (3). 209-214 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Takahashi, T.Oishi, K.Shimomai, Y.Hayashi and S.Nishino: "Analyses of attractive forces between particles in Coulomb crystal of dusty plasmas by optical manipulations" Phys.Rev.E. 58 (6). 7805-7811 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] K.Takahashi, T.Oishi, K.Shimomai, Y.Hayashi and S.Nishino: "Simple Hexagonal Coulomb Crystal near a Deformed Plasma Sheath Boundary in a Dusty Plasma" Jpn.J.Appl.Phys.37 (12A). 6609-6614 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] Y.Hayashi: Strongly Coupled Coulomb Systems. Plenum Press, 207-210 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] 林康明: "強結合ダストプラズマの結晶化と遷移" プラズマ・核融合学会誌. 73,11. 1230-1234 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] 林康明: "プラズマ中のダスト挙動の解析とクーロン結晶の形成" 真空. 41,9. 782-789 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] 林康明: "グロー放電プラズマ中での微粒子成長とクーロン結晶の形成" エアロゾル研究. 13,3. 209-214 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Takahashi: "Analyses of attractive forces between particles in Coulomb crystal of dusty plasmas by optical manipulations" Phys.Rev.E. 58,6. 7805-7811 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Takahashi: "Simple Hexagonal Coulomb Crystal near a Deformed Plasma Sheath Boundary in a Dusty Plasma" Jpn.J.Appl.Phys.37,12A. 6609-6614 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Hayashi: "Strongly Coupled Coulomb Systems" Plenum Press, 4 (1998)

    • Related Report
      1998 Annual Research Report
  • [Publications] Y.Hayashi: "Structure Changes of Coulomb Crystal in a Carbon Fine-Particle Plasma" Jpn.J.Appl.Phys.36,7B. 4976-4979 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] Y.Hayashi: "Advances in Dusty Plasmas" World Scientific, 10 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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