| Project/Area Number |
12650282
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
電力工学・電気機器工学
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| Research Institution | Ariake National College of Technology |
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Principal Investigator |
UCHIUMI Michihiro Ariake National College of Technology, Professor, 電気工学科, 教授 (10213430)
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| Project Period (FY) |
2000 – 2001
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| Project Status |
Completed (Fiscal Year 2001)
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| Budget Amount *help |
¥3,600,000 (Direct Cost: ¥3,600,000)
Fiscal Year 2001: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2000: ¥2,200,000 (Direct Cost: ¥2,200,000)
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| Keywords | Filamentary plasma / serosol / particle counter / laser-induced lightning / air-breakdown / inverse bremsstrahlung / carbon dioxide laser / discharge induction |
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| Research Abstract |
In order to induce a lightning to the tip of a tower, a long ionized channel has been studied. A high-power C02 Iaser can create a long chain of discrete plasma beads but has a problem in inducing a disoharge because its conductance is not homogenous. The short pulse laser can produce a long ionized continuous channel, i, e. filamentary plasma. The theoretical model has developed to explain the mechanism of the production of the filamentary plasma.
The optical air-breakdown mechanism was treated by enrpirical relations instead of taking inverse bremsstrahlung into cosiderations. A simple equation was newly proposed here to describe processes of growing of plasma beads. The simulation results on the density plasma beads wre qualitatively in agreement with experimental results. The model consisting of these procedures has a possibility of predict the density of plasma beads whioh are produoed in the atmosphere by a C02 Iaser owing to ignition of atmospheric aerosols.
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