2012 Fiscal Year Final Research Report
Development of single-plate, two-wavelength Mach Zehnder interferometer for the measurement of unsteady density field with ionization
| Project/Area Number |
24656519
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Aerospace engineering
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| Research Institution | Nagoya University |
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Principal Investigator |
SASOH Akihiro 名古屋大学, 工学研究科, 教授 (40215752)
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| Project Period (FY) |
2012
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| Keywords | レーザー / マッハツェンダー干渉計 / 光学可視化 / 密度場計測 / プラズマ |
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| Research Abstract |
A new Mach-Zehnder interferometer, in which two interferograms with different wavelengths are imaged onto a single plate, has been developed. As light sources, semi-conductor lasers with the respective wavelengths of 473 nm and 593 nm are used. A dual-band-path filter is used to eliminate the effect of emission from ionized gas.The two-dimensional density distributions of heavy particles and electrons are obtained through digital data processing. Demonstration measurement was conducted with laser-pulse-generated plasma in a chamber of 350 mm in diameter and 400 mm in length, thereby obtaining a heavy particle density of 5×1025m-3and a degree of ionization of 10 % in the axi-symmetric field.
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