Experimental study on melting at ultrahigh pressures with intense laser for Earth science and laser fusion View Homepage


Ontology type: schema:MonetaryGrant     


Grant Info

YEARS

2011-2015

FUNDING AMOUNT

17160000.0 JPY

ABSTRACT

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. More... »

URL

https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-23340175

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