Development of the New Double-Path Interferometer for the Measurements of Electron Density and Conductivity in the MHD Plasma
| Project/Area Number |
06650210
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
Fluid engineering
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| Research Institution | KYUSHU UNIVERSITY |
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Principal Investigator |
MASUDA Mitsuharu KYUSHU UNIVERSITY,Interdisciplinary Graduate School of Engineering Sciences, Professor, 大学院・総合理工学研究科, 教授 (40038097)
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| Project Period (FY) |
1994 – 1995
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥2,000,000 (Direct Cost: ¥2,000,000)
Fiscal Year 1995: ¥800,000 (Direct Cost: ¥800,000)
Fiscal Year 1994: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | MAGNETOHYDRODYNAMICS / MHD / FAR-INFRARED / LASER |
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| Research Abstract |
In a large scale MHD channel, it will become important to get information on the fluctuations of the electron density and electrical conductivity, and on the correlation between them. The far-infrared (FIR) laser has offered a powerful diagnostic tool for this purpose, and the method was establish by this research that enabled the simultaneous measurements of electron density and conductivity. In the present research project, the new interferometer is proposed that could measure the large fluctuation of the electron density and conductivity with high temporal and spacial resolution. This interferometer adds another interferometric path to the conventional Michelson interferometer, and is capable of measuring the large fluctuation with the fringe shifts over 2pi. This system was constructed and tested with the experimental MHD channel operated by the combustion of kerosene. The results are summarized as follows.
1. To establish the stable FIR interferometer, the new HCN laser was designed and made. This laser was proved to operate successfully and shown to be used in the interferometer system.
2. The interferometer based on the entirely new concept was designed and made. This has one more interferometer path in the conventional Michelson interferometer. Also, the Schottky-barrier-diode was used to detect the fluctuation. The software that took into account the multiple interferometer path was made. It was shown that the present new system could successfully measure the fluctuations of the electron density and conductivity with high temporal and spatial resolution.
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Report
(3 results)
Research Products
(14 results)
