| Budget Amount *help |
¥16,380,000 (Direct Cost: ¥12,600,000、Indirect Cost: ¥3,780,000)
Fiscal Year 2017: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2016: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2015: ¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2014: ¥9,100,000 (Direct Cost: ¥7,000,000、Indirect Cost: ¥2,100,000)
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| Outline of Final Research Achievements |
We have investigated interfacial instabilities, such as Richtmyer-Meshkov instability, in magnetized plasmas by numerical simulations and laboratory laser experiments. Theoretically, it is found that the magnetic field can reduce the growth of the Richtmyer-Meshkov instability significantly. When the seed field is relatively weak, it can be amplified by the fluid motions. The critical field strength is given by the Alfven number defined by the ratio of the growth velocity and Alfven speed at the interface. To confirm these effects, we performed laser plasma experiments by using the GEKKO laser system in Osaka University. The growth of the interface fluctuations has been observed successfully by optical radiography method. In addition, the B-dot probe have measured the signals of amplified magnetic field through the turbulent motions driven by the interfacial instabilities.
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