Dynamic compression: what it is, making metallic H and magnetic fields of Uranus and Neptune

作者：Nellis W J^*

来源：High Pressure Research, 2017, 37(2): 119-136.

DOI：10.1080/08957959.2017.1303493

• Dynamic compression
• metallic hydrogen
• magnetic fields of Uranus
• Neptune
• shock dissipation
• thermal equilibrium

Static compression is a well-known method to achieve very high pressures in cold' (degenerate) condensed matter. Because dynamic compression is adiabatic, it achieves both high pressures and temperatures, which are tunable by choice of pressure-pulse shape. Dynamic compression uses supersonic hydrodynamic variables, which are straight forward to measure, to achieve a wide range of extreme thermodynamic states in degenerate condensed matter. Because dynamic compression developed primarily in national laboratories, it is relatively unknown to a significant portion of the high pressure community. This paper is a brief review of (i) dynamic compression itself, (ii) its application to making metallic fluid H (MFH) and (iii) implications of data generated at extreme conditions with dynamic compression for understanding the unusual magnetic fields of Uranus and Neptune, which are made primarily by convection of semiconducting and MFH. Metallic hydrogen made under dynamic and static compression is compared.

• 出版日期2017-6