Optical investigations in the megabar range using a chamber consisting of a rounded cone and a flat foundation
Eremets M. I. , Itskevich E. S. , Shirokov A. M. , Yakovlev E. N.
A system of diamond punching dies with a rounded cone-flat plane geometry is used for optical studies of the R luminescence line shift in ruby under pressure and of the pressure distribution in the system. The largest shift occurs at 0.7 Mbar.