Laser Radiation Plasma Dynamics and Momentum Coupling

摘要

The concept of high energy density (HED) radiation driven momentum coupling (momentum transfer), CM, to a targets in a vacuum is analytically developed and applied via successive plasma, ablative, and hydrodynamic interfaces undergoing both weak and strong shocks. C_M are derived from equations of state (EOS) variables and serve as figures of merit to determine energy efficiency conversion into target momentum. Generally, C_M are proportional to the inverse of the interaction speed and related variables for each interaction regime. This approach provides a formalism allowing computation of hitherto intractable HED radiation and mechanical momentum coupling interactions encountered in astrophysics, planetary physics, inertial confinement fusion, near-Earth object hazard mitigation, and HED explosives modeling. C_M is generally not scale invariant as are the hydrodynamic Euler equations. This analytic procedure supports interpretation of experiments using EOS response of material targets to HED interactions on the meso - and macro-scales to describe C_M .