Isentropic Compression of Crystal Phase of Hydrogen Isotopes in Megabar Pressure Range

The paper describes a device for isentropic compression of frozen gases by an ultra-high magnetic field pressure of a cascade magneto-cumulative generator MC-1. Experimental results on isentropic compression of hydrogen isotopes in solid state up to pressure of ~3 Mbar are presented. The experimental results are compared with a calculation. The study into thermodynamic and kinetic properties of hydrogen isotopes within a wide range of pressure and temperature is caused on one hand by their wide spread in the world, the role that they play in structure of stars and giant planets, and on the other hand by their practical importance in life of the whole mankind as future basic energy sources – thermonuclear fusion, theoretical ability for existence of superconducting metal hydrogen at room temperature, and so on. To get wide-range equations of state of hydrogen isotopes both static and dynamic methods are used, both having advantages and disadvantages.