Meeting room "Glova", 4 floor, Integrated Research Building
Abstract
The core is metallic region in the deepest interior of the Earth with more than half of the Earth's radius. Among the physical parameters of the core, sound velocity is the most important parameter because it can be directly compared with tons of seismological data. In these years, we have developed a novel type of measurement to obtain the sound velocity and other important parameters of shock-compressed matter using Gekko-XII Hyper Laser system at Institute of Laser Engineering, Osaka University. From time-resolved side-on x-ray radiograph, it is possible to obtain the trajectories of the both surfaces of thin sample. The kink of the trajectories gives us the travel time of the elastic wave in the shocked sample. This measurement also provides a lot of physical parameters of the shocked region. We recently measured the sound velocity of pure iron using this technique up to 800 GPa. In this seminar, I will present the experimental setup of laser shock, new sound velocity data on molten iron and also application to the deep interior of the giant planets.
For inquiry：Taku Tsuchiya TEL:（089）927-8198
E-mail takut@sci.ehime-u.ac.jp
