| Budget Amount *help |
¥20,670,000 (Direct Cost: ¥15,900,000、Indirect Cost: ¥4,770,000)
Fiscal Year 2018: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2017: ¥5,850,000 (Direct Cost: ¥4,500,000、Indirect Cost: ¥1,350,000)
Fiscal Year 2016: ¥5,330,000 (Direct Cost: ¥4,100,000、Indirect Cost: ¥1,230,000)
Fiscal Year 2015: ¥6,240,000 (Direct Cost: ¥4,800,000、Indirect Cost: ¥1,440,000)
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| Outline of Final Research Achievements |
We investigated the formation mechanism for "fuzz" which is a fuzzy nanostructure induced on the tungsten surface by helium plasma irradiation. We developed the BCA-MD-KMC triple hybrid method, the method to find automatically path of the impurity atom in material, the meta-compiler to generation the simulation code for potential model in molecular dynamics from mathematical expressions. Using these, we succeeded in reproducing the growth of fuzz by simulation. As a growth mechanism, it has come to discover an unexpected mechanism in which repeated sputtering and re-deposition phenomena cause transport of tungsten atoms after burst of helium bubbles.
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