Physical Review E (Plasma physics)

Author(s): Swati Swagatika Mishra, Sudeep Bhattacharjee, and Pascal Brault

Atmospheric pressure helium plasmas are investigated through molecular dynamics simulations at room temperature (300 K) for various ionization fractions (χi=10−1−10−5) in the strongly coupled regime (ion coupling parameter, Γi∼1−10) employing Coulomb and Yukawa interaction potentials. The role of el…

[Phys. Rev. E 111, 015208] Published Wed Jan 22, 2025

Author(s): B. Clavier, D. Zarzoso, D. del-Castillo-Negrete, and E. Frénod

Generative artificial intelligence methods are employed for the first time to construct a surrogate model for plasma turbulence that enables long-time transport simulations. The proposed GAIT (Generative Artificial Intelligence Turbulence) model is based on the coupling of a convolutional variationa…

[Phys. Rev. E 111, L013202] Published Wed Jan 22, 2025

Author(s): Shipra Verma and Kannabiran Seshasayanan

We study the effects of conductivity variation on the Ponomarenko dynamo. Taking monotonically increasing, decreasing and sinusoidally varying radial profiles, we study the kinematic dynamo problem. The threshold of the dynamo, given by the critical magnetic Reynolds number Rmc, is found to strongly…

[Phys. Rev. E 111, 015207] Published Tue Jan 21, 2025

Author(s): Augustin Blanchet, François Soubiran, Marc Torrent, and Jean Clérouin

We computed the equation of state of iron using extended first-principles molecular dynamics simulations, ranging from 7.874g/cm3 and 5500 K up to 47.2g/cm3 and 109K. We compared the principal Hugoniot curve with semiempirical models, average atom-based model predictions, and shock experiment result…

[Phys. Rev. E 111, 015206] Published Thu Jan 16, 2025

Author(s): A. Curcio, M. L. Berlanga, N. Boudjema, E. Chiadroni, A. Cianchi, A. Del Dotto, D. Francescone, M. Galletti, V. Horny, A. Huerta, A. Mostacci, J. A. Pérez-Hernández, M. Petrarca, I. Rodriguez, C. Salgado-López, F. Stocchi, P. Tomassini, I. Vladisavlevici, M. D. Frias, M. Ferrario, and G. Gatti

The duration of incoherent XUV pulses down to the femtoseconds (fs) can be retrieved through a statistical analysis of the modulations on the observed radiation spectrum. Uncorrelated shot-noise fluctuations in the pulse temporal profile result in incoherent radiation showing a multispike spectrum w…

[Phys. Rev. E 111, L013201] Published Wed Jan 15, 2025

Author(s): M. W. C. Dharma-wardana, Dennis D. Klug, Hannah Poole, and G. Gregori

Recent cutting-edge experiments have provided in situ structure characterization and measurements of the pressure (P), density (ρ¯), and temperature (T) of shock compressed silicon in the 100 GPa range of pressures and up to ∼10000K. We present first-principles calculations in this P,T,ρ¯ regime to …

[Phys. Rev. E 111, 015205] Published Tue Jan 14, 2025

Author(s): Daniel Plummer, Pontus Svensson, Dirk O. Gericke, Patrick Hollebon, Sam M. Vinko, and Gianluca Gregori

By performing an ensemble of molecular dynamics simulations, the model-dependent ionization state is computed for strongly interacting systems self-consistently. This is accomplished through a free energy minimization framework based on the technique of thermodynamic integration. To illustrate the m…

[Phys. Rev. E 111, 015204] Published Mon Jan 13, 2025

Author(s): Vladimir I. Kolobov and Robert R. Arslanbekov

A hybrid kinetic-fluid model is used to study plasma stratification in alternating current (ac) discharges in noble gases at low plasma densities. Self-consistent coupled solutions of a nonlocal kinetic equation for electrons, a drift-diffusion equation of ions, and a Poisson equation for the electr…

[Phys. Rev. E 111, 015203] Published Fri Jan 10, 2025

Author(s): Jarett LeVan and Scott D. Baalrud

The intrinsic bulk viscosity of the one-component plasma (OCP) is computed and analyzed using equilibrium molecular dynamics simulations and the Green-Kubo formalism. It is found that bulk viscosity exhibits a maximum at Γ≈1, corresponding to the condition that the average kinetic energy of particle…

[Phys. Rev. E 111, 015202] Published Tue Jan 07, 2025