Dynamical properties of inertial confinement fusion plasmas

Study of the interaction processes of ion beams with dense plasmas is one of the important problems in the physics of inertial confinement fusion (ICF), warm dense matter and highpower lasers physics. Nowadays, a state of matter under extremely high pressure is an object of high interest..

Ion core effect on transport characteristics in warm dense matter

An effective potential approach in combination with the molecular dynamics (MD) method was used to study the effect of the ionic core on the transport properties of ions in the warm dense matter regime. As an example, we considered shocked silicon. The results of MD simulations within microcanonical ensemble were analyzed by computing the mean squared displacement (MSD) and the velocity autocorrelation function (VAF) of particles. The MSD and VAF are used to compute the diffusion coefficient of ions. The results are compared with the data computed neglecting the ion core effect. It is found that the ion core effect leads to a significant decrease of the diffusion coefficient. Additionally, we computed the viscosity coefficient of ions using the Green-Kubo relation connecting viscosity and the stress autocorrelation function. It is revealed that the ion core effect can cause increase or reduction of the viscosity coefficient depending on the strength of inter-ionic coupling

Influence of the ion core on relaxation processes in dense plasmas

The effect of an ionic core on the temperature relaxation in dense hot plasma of beryllium is studied using the pseudpotential model by Gericke et al [Phys. Rev. E 2010, 81, 065401(R)]. Employing the screened version of the ion pseudpotential [by Ramazanov et al, Phys. Plasmas 2021, 28 (9), 092702], we computed the quantum transport cross-section for the electron-ion collisions in dense beryllium plamsas, where screening is taking into account using the density response function in the long wavelength regime. The results for the transport cross-section are used to compute a generalised Coulomb logarithm and electron-ion collision frequency. Utilizing the latter, we show the effect of the ionic core on the temperature relaxation. To understand the role of the ionic core, we compare the results with the data computed considering ions as point-like charges

Experimental investigation of the interaction of plasma flow with the wall of fusion reactor

One of the problems of controlled fusion physics related to the control of the plasma flow is minimization of erosion of intrachamber components, in particular, the first wall of the reactor, which leads to formation of dust (micron- sized particles) and nanostructured products..

Experimental investigation of the interaction of plasma flow with the wall of fusion reactor

One of the problems of controlled fusion physics related to the control of the plasma flow is minimization of erosion of intrachamber components, in particular, the first wall of the reactor, which leads to formation of dust (micron- sized particles) and nanostructured products..

Microscopic and Dynamical Properties of ICF/WDM Plasmas

Investigation of physical properties of dense plasmas is one of the important topics in the physics of inertial confinement fusion, warm dense matter and high-power lasers physics. Due to the big difference between the mass of ions and electrons the considered plasma is dense and non-isothermal. It is known that the interaction potentials between particles are also of importance for correctly calculation of plasma properties taking into account peculiarities and parameters of investigated plasma [1]..

Microscopic and Dynamical Properties of ICF/WDM Plasmas

Investigation of physical properties of dense plasmas is one of the important topics in the physics of inertial confinement fusion, warm dense matter and high-power lasers physics. Due to the big difference between the mass of ions and electrons the considered plasma is dense and non-isothermal. It is known that the interaction potentials between particles are also of importance for correctly calculation of plasma properties taking into account peculiarities and parameters of investigated plasma [1]..

Cluster virial expansion for the equation of state of partially ionized hydrogen plasma

We study the contribution of electron-atom interaction to the equation of state for partially ionized hydrogen plasma using the cluster-virial expansion. For the first time, we use the Beth-Uhlenbeck approach to calculate the second virial coefficient for the electron-atom (bound cluster) pair from the corresponding scattering phase-shifts and binding energies. Experimental scattering cross-sections as well as phase-shifts calculated on the basis of different pseudopotential models are used as an input for the Beth-Uhlenbeck formula. By including Pauli blocking and screening in the phase-shift calculation, we generalize the cluster-virial expansion in order to cover also near solid density plasmas. We present results for the electron-atom contribution to the virial expansion and the corresponding equation of state, i.e. pressure, composition, and chemical potential as a function of density and temperature. These results are compared with semi-empirical approaches to the thermodynamics of partially ionized plasmas. Avoiding any ill-founded input quantities, the Beth-Uhlenbeck second virial coefficient for the electron-atom interaction represents a benchmark for other, semi-empirical approaches.Comment: 16 pages, 10 figures, and 5 tables, resubmitted to PR