Kinetic approach to temperature relaxation in dense plasmas

Kinetic approach to temperature relaxation in dense plasmas

The relaxation of nonideal two-temperature plasmas is investigated with a kinetic approach. First the energy transfer between the electrons and ions is described using different approximations: the energy transfer through classical collisions (Landau-Spitzer approach) is reviewed; quantum diffraction and strong collisions are included by applying the quantum Boltzmann equation; the influence of...

Relaxation of Dense, Reacting Two-Temperature-Plasmas

The driver energy in many dense plasma experiments is almost exclusively coupled into one species and, thus, a two-temperature plasma is created after a short relaxation. Beam particles or field ionization can also create a nonequilibrium charge state distribution. Although ionization kinetics and temperature equilibration usually occur on separated time scales (for solid density ≈ 100 fs and ≈...

Correlation effects on the temperature-relaxation rates in dense plasmas.

We present a model for the rate of temperature relaxation between electrons and ions in plasmas. The model includes self-consistently the effects of particle screening, electron degeneracy, and correlations between electrons and ions. We successfully validate the model over a wide range of plasma coupling against molecular-dynamics simulations of classical plasmas of like-charged electrons and ...

Kinetic temperature gradient driven modes in inhomogeneous plasmas

New unstable temperature gradient driven modes in an inhomogeneous plasma are identified. These modes represent transient ω ≃ k‖v (e,i) th sound oscillations in magnetized plasma that are kinetically destabilized via Landau interactions. Electron and ion sound branches are unstable for large values of the Larmor radius parameter k⊥ρe,i ≫ 1, respectively. The instability occurs due to a specific...

On bias of kinetic temperature measurements in complex plasmas