| Budget Amount *help |
¥17,160,000 (Direct Cost: ¥13,200,000、Indirect Cost: ¥3,960,000)
Fiscal Year 2014: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2013: ¥3,770,000 (Direct Cost: ¥2,900,000、Indirect Cost: ¥870,000)
Fiscal Year 2012: ¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2011: ¥5,590,000 (Direct Cost: ¥4,300,000、Indirect Cost: ¥1,290,000)
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| Outline of Final Research Achievements |
This experimental study is to melting phenomena at ultrahigh pressures with intense laser. In inertial confinement fusion, hydrodynamic instabilities are of great importance for high density compression. In order to mitigate these instabilities, we focus on stiffness on target material. Experiments were carried out to explore melting issues on ultrahigh pressure region with x-ray radiography technique. We found that the melting at ultrahigh-pressure is "simple" melting from diamond structure into liquid phase. Also found that the stiffness of diamond can mitigate the initial imprinting with its low compressibility.
The melting issue at ultrahigh pressures are also of great important on Earth science. We carried out measurements of sound velocity of iron and iron mixture in order to determine the effects on composition of outer core of the Earth. We obtained the experimental data, suggesting the sound velocity shows good agreements with Birch's low at ultrahigh pressure up to 1 TPa.
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