EOS Measurements for Hydrogen by Laser-Induced Shock Compression and the Internal Structure of Gas Giant Planets

Abstract

Equation of state (EOS) for hydrogen under high pressure is a key quantity in un-derstanding the internal structures of gas giant planets like Jupiter. We just started laser experiments using the Gekko XII system in ILE, Osaka University to determine the EOS for hydrogen under high pressure around 2 Mbar. Our goal is to reveal the transition phase from the molecular form to metallic hydrogen. We will show the current status of our experiment, which will be able to give a constraint on the formation scenario of Jovian planets.