| Budget Amount *help |
¥43,810,000 (Direct Cost: ¥33,700,000、Indirect Cost: ¥10,110,000)
Fiscal Year 2015: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Fiscal Year 2014: ¥14,040,000 (Direct Cost: ¥10,800,000、Indirect Cost: ¥3,240,000)
Fiscal Year 2013: ¥15,730,000 (Direct Cost: ¥12,100,000、Indirect Cost: ¥3,630,000)
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| Outline of Final Research Achievements |
Activities of protosun is believed to be much higher than the case of present sun and the activities would much contributed to the early solar system evolution, but the protosolar activity have not been well understand quantitatively. In order to study the protosolar activities, we have established microanalysis method for solar wind He in micro areas on materials using strong-field ionization of sputtered particles. We determined solar wind He distribution of a solar wind irradiated sample of NASA Genesis mission by the new method. We also determined quantitative 3-D distributions of solar wind He of asteroid Itokawa particles returned by JAXA Hayabusa mission. We have tried to detect solar wind He from gas-rich chondrites, but have not been detected probably because of lower concentration of the He. More development of the analysis method is required.
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