Partially Ionized Plasmas in Astrophysics

Quantum Molecular Dynamics of Partially Ionized Plasmas

We study a partially ionized hydrogen plasma by means of quantum molecular dynamics, which is based on wave packets. We introduce a new model which distinguishes between free and bound electrons. The free electrons are modelled as Gaussian wave packets with fixed width. For the bound states the 1s-wave function of the hydrogen atom is assumed. In our simulations we obtain thermodynamic properti...

Hall magnetohydrodynamics of partially ionized plasmas

The Hall effect arises in a plasma when electrons are able to drift with the magnetic field but ions cannot. In a fully-ionized plasma this occurs for frequencies between the ion and electron cyclotron frequencies because of the larger ion inertia. Typically this frequency range lies well above the frequencies of interest (such as the dynamical frequency of the system under consideration) and c...

Multicomponent Transport Algorithms for Partially Ionized Plasmas

We investigate iterative methods for solving transport linear systems of partially ionized plasmas. We consider the situations of weak and strong magnetic fields as well as nonequilibrium and the linear systems are investigated in their natural constrained singular symmetric form. Stationary iterative techniques are considered with a new more singular formulation of the transport linear systems...

Stopping power for deuterons in partially ionized Al plasmas

A hierarchy of diffusion models for partially ionized plasmas

Partially ionized plasmas corresponding to different ionization degrees are derived and connected one with each other by the diffusion approximation methodology. These plasmas are the following electrical discharges: a thermal arc discharge, glow discharges in local thermodynamic equilibrium -LTEand in non-LTE, and a non-LTE glow discharge interacting with an electron beam (or flow).