| Budget Amount *help |
¥19,760,000 (Direct Cost: ¥15,200,000、Indirect Cost: ¥4,560,000)
Fiscal Year 2014: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2013: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2012: ¥13,520,000 (Direct Cost: ¥10,400,000、Indirect Cost: ¥3,120,000)
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| Outline of Final Research Achievements |
The fusion output will be controlled by measuring the electron density in the future fusion reactors. Therefore, high reliability and density resolution are required to the electron density measurement. We have been developed a dispersion interferometer, which is insensitive to the mechanical vibrations and can suppress fringe jump errors. In this research, we designed the optical system of short wavelength laser Nd:YAG laser dispersion interferometer, which is suitable to conditions of future fusion reactors. A bench-testing is conducted and an electron density resolution of 2×10＾18 m＾(-3) is obtained in the reactor conditions such as ITER and helical reactor FFHR-d1. It is demonstrated that the temperature control of nonlinear crystals, which is used to generate the second harmonic component, will be effective to improve the density resolution.
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