Recent developments in neutron diffraction experiments at high pressure and high temperature and application to Earth science

Sano, Asami   ; Kakizawa, Sho*; Mori, Yuichiro*; Kagi, Hiroyuki*; Abe, Jun*; Funakoshi, Kenichi*; Hattori, Takanori   

Neutron scattering with high sensitivity to hydrogen can be a powerful tool in the investigation of hydrogen in the Earth's material. In the high-pressure neutron diffractometer PLANET at MLF in J-PARC, a large volume 6-axis multi-anvil press, and precise optics have enabled stable neutron diffraction experiments at high pressure and high temperature. This sample environment has promoted unique research, as exemplified by determining the amount of hydrogen in the iron alloys that form the Earth's core. In this presentation, recent results of neutron experiments at PLANET will be presented, as well as the on-going developments.