| Project/Area Number |
62460073
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Aerospace engineering
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
SAWAOKA Akira Research Laboratory of Enigeering Matorials, TIT, Professor, 工業材料研究所, 教授 (40029468)
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| Co-Investigator(Kenkyū-buntansha) |
TAMURA Hideki Research Laboratory of Enigeering Matorials, TIT, Assistant, 工業材料研究所, 助手 (30188437)
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| Project Period (FY) |
1987 – 1988
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| Project Status |
Completed (Fiscal Year 1988)
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| Budget Amount *help |
¥7,000,000 (Direct Cost: ¥7,000,000)
Fiscal Year 1988: ¥1,800,000 (Direct Cost: ¥1,800,000)
Fiscal Year 1987: ¥5,200,000 (Direct Cost: ¥5,200,000)
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| Keywords | Plasma gun / Shied structure / Debris / Micro-meteoroid / Impact / 二重防護板 |
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| 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.
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