Direct laser-driven ramp compression studies of iron: A first step toward the reproduction of planetary core conditions

作者：Amadou N^*; Brambrink E; Benuzzi Mounaix A; Huser G; Guyot F; Mazevet S; Morard G; de Resseguier T; Vinci T; Myanishi K; Ozaki N; Kodama R; Boehly T; Henry O; Raffestin D; Koenig M

来源：High Energy Density Physics, 2013, 9(2): 243-246.

DOI：10.1016/j.hedp.2013.01.003

• Isentropic compression
• Iron
• Planet interior
• Laser
• Shock compression

The study of iron under quasi-isentropic compression using high energy lasers, might allow to understand its thermodynamical properties, in particular its melting line in conditions of pressure and temperature relevant to Earth-like planetary cores (330-1500 GPa, 5000-8000 K). However, the iron alpha-epsilon solid solid phase transition at 13 GPa favors shock formation during the quasi-isentropic compression process which can depart from the appropriate thermodynamical path. Understanding this shock formation mechanism is a key issue for being able to reproduce Earth-like planetary core conditions in the laboratory by ramp compression. In this article, we will present recent results of direct laser-driven quasi-isentropic compression experiments on iron samples obtained on the LULI 2000 and LIL laser facilities.

• 出版日期2013-6
• 单位中国地震局