Ergodic model for the expansion of spherical nanoplasmas

Abstract

Recently, the collisionless expansion of spherical nanoplasmas has been analyzed with a new ergodic model, clarifying the transition from hydrodynamic-like to Coulomb-explosion regimes, and providing accurate laws for the relevant features of the phenomenon. A complete derivation of the model is here presented. The important issue of the self-consistent initial conditions is addressed by analyzing the initial charging transient due to the electron expansion, in the approximation of immobile ions. A comparison among different kinetic models for the expansion is presented, showing that the ergodic model provides a simplified description, which retains the essential information on the electron distribution, in particular, the energy spectrum. Results are presented for a wide range of initial conditions (determined from a single dimensionless parameter), in excellent agreement with calculations from the exact Vlasov-Poisson theory, thus providing a complete and detailed characterization of all the stages of the expansion.

To appear on Physical Review E

References in corpus (4)

• Ionization of clusters in intense laser pulses through collective electron dynamics
• Kinetics of the collisionless expansion of spherical nanoplasmas
• Dynamics and control of the expansion of finite-size plasmas produced in ultraintense laser-matter interactions
• Controlled Shock Shells and Intracluster Fusion Reactions in the Explosion of Large Clusters

Cited by in corpus (2)

• Expansion of nanoplasmas and laser-driven nuclear fusion in single exploding clusters
• Gridless particle technique for the Vlasov Poisson system in problems with high degree of symmetry