| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2017: ¥650,000 (Direct Cost: ¥500,000、Indirect Cost: ¥150,000)
Fiscal Year 2016: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
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| Outline of Final Research Achievements |
To investigate the propagation and absorption of lower-hybrid waves in the spherical tokamak plasma, we attempted to developed a microwave scattering diagnostic which can measure small density fluctuations of the lower-hybrid waves. We have newly developed a microwave scattering simulation to analyze the measurement result quantitatively, and to optimize the scattering diagnostic design. We have built two scattering diagnostics which are sensitive to different parameter spaces and attempted to detect LH waves, but we were not able to measure any signal above the noise floor during the project period. We will continue to improve the accuracy of our numerical simulations and develop a microwave diagnostic which can measure LH waves directly.
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