| Budget Amount *help |
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2017: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2016: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
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| Outline of Final Research Achievements |
We have developed a new method for calculating steady states of magnetohydrodynamics (MHD) model that describes macroscopic motion of magnetized plasmas. The new method, named simulated annealing, enables us to obtain a wider class of equilibria that we have not be able to calculate by existing methods. We have applied the simulated annealing to low-beta reduced MHD, and have obtained steady states of cylindrical plasmas where magnetic islands and/or helical deformations exist inside the plasmas as lower energy states. Furthermore, we have extended the method to high-beta reduced MHD, and have succeeded to obtain equilibria of toroidal plasmas. In addition, this research required advanced numerical technique suitable for the Hamiltonian systems. Thus we have advanced research on structure-preserving numerical algorithms for Hamiltonian systems including charged particle dynamics.
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