| Budget Amount *help |
¥44,200,000 (Direct Cost: ¥34,000,000、Indirect Cost: ¥10,200,000)
Fiscal Year 2019: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2018: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Fiscal Year 2017: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2016: ¥8,840,000 (Direct Cost: ¥6,800,000、Indirect Cost: ¥2,040,000)
Fiscal Year 2015: ¥14,430,000 (Direct Cost: ¥11,100,000、Indirect Cost: ¥3,330,000)
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| Outline of Final Research Achievements |
A goal of this research is to establish a new picture of turbulence in magnetized plasma where spatial structure of plasma is not smooth but is corrugated by meso-scale bump and hole structures. In order to observe such corrugated structures, an offset frequency sweeping microwave comb reflectometry has been developed. A fixed frequency microwave comb has also used together and spatial resolution of 1 mm and temporal resolution of 1 micro second have been achieved by this new system. The system was applied to PANTA plasma diagnostics. Experimental observations show 1) bump and hole structures are formed intermittently and the radial propagation of them is ballistic and travel distance is several times longer than ion sound gyro-radius, 2) propagation of turbulence front accompanied with the propagation of the ump and hole structure and the self-organized criticality is identified. These results support a picture of plasma turbulence where multi-scale structures interact each others.
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