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1988 Fiscal Year Final Research Report Summary

Study on the Dual-Element Meteoroid-Shield Structure of Space Experiment Free Flyer

Research Project

Project/Area Number 62460073
Research Category

Grant-in-Aid for General Scientific Research (B)

Allocation TypeSingle-year Grants
Research Field Aerospace engineering
Research InstitutionTokyo Institute of Technology

Principal Investigator

SAWAOKA Akira  Research Laboratory of Enigeering Matorials, TIT, Professor, 工業材料研究所, 教授 (40029468)

Co-Investigator(Kenkyū-buntansha) TAMURA Hideki  Research Laboratory of Enigeering Matorials, TIT, Assistant, 工業材料研究所, 助手 (30188437)
Project Period (FY) 1987 – 1988
KeywordsPlasma gun / Shied structure / Debris / Micro-meteoroid / Impact / 二重防護板
Research Abstract

A new two-stage plasma accelerator was developed for conducting the hypervelocity acceleration of microprojectiles. The accelerator consisted of a gas gun as a first stage and a plasma accelerator as the second stage. It was confirmed that the two-stage operation performed well at any timing started by the laser trigger system. It was found that the velocity of projectiles was increased in the two-stage operation and that the velocity greatly depended on the position at the beginning of acceleration. The impact rate of projectiles on a target was also markedly increased. A glass beads with 500 mum in diameter has been accelerated up to 10 km/sec. A transition from plastic to hydrodynamic regime on 5052 aluminum alloy target occurs at about 5 km/sec for submillimeter-sized glass projectiles. Relation between crater size and projectile velocity-mass was studied. Protection form the hypervelocity impact of small size projectile to space experiment free-flyer was also investigated on the basis of the dual-element meteoroid-shield structure.

  • Research Products

    (10 results)

All Other

All Publications (10 results)

  • [Publications] 曽我眞二: 圧力技術. 25. 120-126 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] S.Soga: Report of Research Laboratory of Engineering Materials,TIT. 12. 113-123 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] 臼井俊央: 圧力技術. 25. 307-312 (1987)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] T.Usui: Report of Research Laboratory of Engineering Materials,TIT. 13. 95-105 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] H.Tamura: Japanese J.Appl.Phys.27. L1986-L1988 (1988)

    • Description
      「研究成果報告書概要(和文)」より
  • [Publications] SOGA, Shinji: "Performance Test of Plasma Gun as Small Sphere Accelerator" High Pressure Technology. 25. 120-126 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] SOGA, Shinji: "Velocity Dependencies of Glass Beads on the Impact Phenomena using a Plasme Accelerator" Report of Research Laboratory of Engineering Materials, TIT. 12. 111-123 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] USUI, Toshichika: "Experimental Studies for a Dual Element Meteoroid Shield Structure" High Pressure Technology. 25. 307-312 (1987)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] USUI, Toshichika: "Study on the Development of a Dual-Element Meteoroid-Shield Structure" Report of the Research Laboratory of Engieering Materials, TIT. 13. 95-105 (1988)

    • Description
      「研究成果報告書概要(欧文)」より
  • [Publications] TAMURA, Hideki: "Improvement of Projectile Velocity and Impact Rate on a Target by Two-Stage Plasma Accelerator" Japanese J. Appl. Phys.27. 1986-1988 (1988)

    • Description
      「研究成果報告書概要(欧文)」より

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Published: 1990-03-20  

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