1. Center for High Pressure Science and Technology Advanced Research, Beijing, 100094, China
2. Geophysical Laboratory, Carnegie Institution of Washington, Washington, District of Columbia 20015, United States
3. Japan Proton Accelerator Research Complex
Center, Japan Atomic Energy Agency, Tokai, Ibaraki 319-1195, Japan
4. HPSynC,
Geophysical Laboratory, Carnegie Institution of Washington, Argonne, Illinois 60439, United States