| Project/Area Number |
20760584
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Nuclear fusion studies
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| Research Institution | National Institute for Fusion Science |
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Principal Investigator |
AKIYAMA Tsuyoshi National Institute for Fusion Science, 大型ヘリカル研究部, 助教 (80370138)
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| Project Period (FY) |
2008 – 2009
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| Project Status |
Completed (Fiscal Year 2009)
|
| Budget Amount *help |
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2009: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Fiscal Year 2008: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Keywords | プラズマ計測 / Dispersion干渉計 / 振動補正 / 光弾性変調器 |
|---|
| Research Abstract |
In order to improve the measurement resolution of a dispersion interferometer, which is free from mechanical vibrations, the phase modulation method using a ratio of modulation amplitudes is proposed and adopted. The enough power of the second harmonic can be generated with a nonlinear crystal AgGaSe_2, although the generation is usually difficult for a frequency-stabilized continuous-wave laser. The feasibility of the proposed method is demonstrated by the phase shift measurement of the ZnSe plate, which simulates a plasma. It is confirmed that the mechanical vibrations are cancelled optically and gives no phase errors.
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