| Budget Amount *help |
¥15,340,000 (Direct Cost: ¥11,800,000、Indirect Cost: ¥3,540,000)
Fiscal Year 2017: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2016: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
Fiscal Year 2015: ¥7,540,000 (Direct Cost: ¥5,800,000、Indirect Cost: ¥1,740,000)
Fiscal Year 2014: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
Deuterium (D) retention in tungsten (W) irradiated with 2.4 MeV Cu2+ ions under various conditions has been investigated. A new desorption peak appeared at ~830 K in thermal desorption spectra due to the heavy ion irradiation, which is attributed to nano-voids and vacancy clusters. The D retention in W irradiated with 2.4 MeV Cu2+ ions increased with the damage dose up to 0.4 dpa and then saturated in the case of high dose rate. On the other hand, the D retention increased with the damage dose in the case of low dose rate. The D retention in the irradiated W significantly reduced by simultaneous annealing with irradiation. Deuterium retention in W deposited with Cr and W has been investigated.
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