Physical Review E (Plasma physics)

Author(s): Amir Jafari, Ethan Vishniac, and Vignesh Vaikundaraman

We develop a quantitative relationship between magnetic diffusion and the level of randomness, or stochasticity, of the diffusing magnetic field in a magnetized medium. A general mathematical formulation of magnetic stochasticity in turbulence has been developed in previous work in terms of the Lp n...

[Phys. Rev. E 100, 043205] Published Fri Oct 18, 2019

Author(s): Yuan Ping, Heather D. Whitley, Andrew McKelvey, Gregory E. Kemp, Phillp A. Sterne, Ronnie Shepherd, Marty Marinak, Rui Hua, Farhat N. Beg, and Jon H. Eggert

Warm dense carbon is generated at 0.3–2.0 g/cc and 1–7 eV by proton heating. The release equation of state (EOS) after heating and thermal conductivity of warm dense carbon are studied experimentally in this regime using a Au/C dual-layer target to initiate a temperature gradient and two picosecond ...

[Phys. Rev. E 100, 043204] Published Thu Oct 17, 2019

Author(s): Yitong Wu, Liangliang Ji, Xuesong Geng, Qin Yu, Nengwen Wang, Bo Feng, Zhao Guo, Weiqing Wang, Chengyu Qin, Xue Yan, Lingang Zhang, Johannes Thomas, Anna Hützen, Alexander Pukhov, Markus Büscher, Baifei Shen, and Ruxin Li

We investigate the precession of electron spins during beam-driven plasma-wakefield acceleration based on density down-ramp injection by means of full three-dimensional (3D) particle-in-cell (PIC) simulations. A relativistic electron beam generated via, e.g., laser wakefield acceleration, serves as ...

[Phys. Rev. E 100, 043202] Published Fri Oct 11, 2019

Author(s): Wei Lin, M. S. Murillo, and Yan Feng

What happens in plasmas after a compressional shock wave? In this paper, the authors perform numerical simulations to investigate the thermodynamic properties of the postshock region in two-dimensional Yukawa systems to mimic shocks in two-dimensional dusty plasmas.

[Phys. Rev. E 100, 043203] Published Fri Oct 11, 2019

Author(s): Jérôme Daligault and Jacopo Simoni

We present a theory for the rate of energy exchange between electrons and ions—also known as the electron-ion coupling factor—in physical systems ranging from hot solid metals to plasmas, including liquid metals and warm dense matter. The paper provides the theoretical foundations of a recent work [...

[Phys. Rev. E 100, 043201] Published Wed Oct 09, 2019

Author(s): H. Wen, A. V. Maximov, R. Yan, J. Li, C. Ren, and F. S. Tsung

The nonlinear regime of laser-plasma interactions including both two-plasmon decay (TPD) and stimulated Raman scattering (SRS) instabilities has been studied in three-dimensional (3D) particle-in-cell simulations with parameters relevant to the inertial confinement fusion (ICF) experiments. SRS and ...

[Phys. Rev. E 100, 041201(R)] Published Fri Oct 04, 2019

Author(s): A. J. White, C. Ticknor, E. R. Meyer, J. D. Kress, and L. A. Collins

We present the formulation, simulations, and results for multicomponent mutual diffusion coefficients in the warm, dense matter regime. While binary mixtures have received considerable attention for mass transport, far fewer studies have addressed ternary and more complex systems. We therefore expli...

[Phys. Rev. E 100, 033213] Published Mon Sep 30, 2019

Author(s): Zhao-Qi Wang, Zhi-Guo Li, Yu-Feng Wang, Lei Liu, Yun-Jun Gu, Qi-Feng Chen, and Xiang-Rong Chen

Extensive quantum molecular dynamics (QMD) simulations are performed to determine the equation of state, sound velocity, and phase diagram of middle-Z krypton in a warm dense regime where the pressure (P) is up to 300 GPa and the temperature is up to 60 kK. The shock wave experimental data are used ...

[Phys. Rev. E 100, 033214] Published Mon Sep 30, 2019

Author(s): Y. Lang, Z. B. Guo, X. G. Wang, and B. Li

A profile-evolving simulation of the Controlled Shear Decorrelation Experiment (CSDX) linear device is performed with our newly developed code. The simulation result shows an excellent agreement with the experimental observations of profiles and fluctuations of plasma density and electric potential ...

[Phys. Rev. E 100, 033212] Published Thu Sep 26, 2019

Author(s): Zahra Ghannad

We investigate Fickian diffusion in two-dimensional (2D) Yukawa liquids using molecular dynamics simulations. We compute the self–van Hove correlation function Gs(r,t) and the self-intermediate scattering function Fs(k,t), and we compare these functions with those obtained from mean-squared displace...

[Phys. Rev. E 100, 033211] Published Wed Sep 25, 2019

Author(s): M. F. Kasim, A. F. A. Bott, P. Tzeferacos, D. Q. Lamb, G. Gregori, and S. M. Vinko

Proton radiography is a technique in high-energy density science to diagnose magnetic and/or electric fields in a plasma by firing a proton beam and detecting its modulated intensity profile on a screen. Current approaches to retrieve the integrated field from the modulated intensity profile require...

[Phys. Rev. E 100, 033208] Published Tue Sep 24, 2019

Author(s): Martin Lemoine, Arno Vanthieghem, Guy Pelletier, and Laurent Gremillet

In this second paper of a series, we discuss the dynamics of a plasma entering the precursor of an unmagnetized, relativistic collisionless pair shock. We discuss how this background plasma is decelerated and heated through its interaction with a microturbulence that results from the growth of a cur...

[Phys. Rev. E 100, 033209] Published Tue Sep 24, 2019

Author(s): Martin Lemoine, Guy Pelletier, Arno Vanthieghem, and Laurent Gremillet

In this third paper of a series, we discuss the physics of the population of accelerated particles in the precursor of an unmagnetized, relativistic collisionless pair shock. In particular, we provide a theoretical estimate of their scattering length lscatt(p) in the self-generated electromagnetic t...

[Phys. Rev. E 100, 033210] Published Tue Sep 24, 2019

Author(s): W. Li, K. Wang, C. Reichhardt, C. J. O. Reichhardt, M. S. Murillo, and Yan Feng

We investigate the depinning dynamics of two-dimensional dusty plasmas driven over one-dimensional periodic substrates using Langevin dynamical simulations. We find that, for a specific range of substrate strengths, as the external driving force increases from zero, there are three different states,...

[Phys. Rev. E 100, 033207] Published Fri Sep 20, 2019

Author(s): James D. Sadler, Yingchao Lu, Benjamin Spiers, Marko W. Mayr, Alex Savin, Robin H. W. Wang, Ramy Aboushelbaya, Kevin Glize, Robert Bingham, Hui Li, Kirk A. Flippo, and Peter A. Norreys

Inertial confinement fusion fuel suffers increased x-ray radiation losses when carbon from the capsule ablator mixes into the hot-spot. Here, we present one- and two-dimensional ion Vlasov-Fokker-Planck simulations that resolve hot-spot self-heating in the presence of a localized spike of carbon mix...

[Phys. Rev. E 100, 033206] Published Mon Sep 09, 2019

Author(s): Seth Pree, Seth Putterman, and John P. Koulakis

We present a method of sound amplification and self-oscillation in high pressure partially ionized gas. Continuous microwaves incident on partially ionized gas may sustain and amplify an acoustic field if increased ionization during the sound field's adiabatic compression enhances rf power absorptio...

[Phys. Rev. E 100, 033204] Published Fri Sep 06, 2019

Author(s): G. Lehmann and K. H. Spatschek

Beating of a broad laser reference beam with a quite general focused object beam inside a plasma volume generates a dynamic plasma hologram. Both beams may be of moderate intensity. The volume hologram can be read out by an ultraintense main beam (of similar structure as the reference beam) producin...

[Phys. Rev. E 100, 033205] Published Fri Sep 06, 2019

Author(s): Sung Min Jo, Oh Joon Kwon, and Jae Gang Kim

In the present study, three different electronic state-to-state methods are proposed to analyze nonequilibrium air plasma flows behind a strong shock wave. In the first approach representing the conventional method, a two-temperature model combined with the electronic quasi-steady-state assumption i...

[Phys. Rev. E 100, 033203] Published Thu Sep 05, 2019

Author(s): Gérald Faussurier and Christophe Blancard

We present calculations of electrical resistivity in dense plasmas using the average-atom model. The Born approximation is proposed to improve the computations especially in the hot domain of the density and temperature plane. Both the nonrelativistic and relativistic regimes are considered. Numeric...

[Phys. Rev. E 100, 033202] Published Wed Sep 04, 2019

Author(s): G. Duchateau, S. X. Hu, A. Pineau, A. Kar, B. Chimier, A. Casner, V. Tikhonchuk, V. N. Goncharov, P. B. Radha, and E. M. Campbell

Laser imprinting possesses a potential danger for low-adiabat and high-convergence implosions in direct-drive inertial confinement fusion (ICF). Within certain direct-drive ICF schemes, a laser picket (prepulse) is used to condition the target to increase the interaction efficiency with the main pul...

[Phys. Rev. E 100, 033201] Published Tue Sep 03, 2019