Physical Review E (Plasma physics)

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

To avoid damage in high-power laser systems, a chirped plasma-based grating is proposed for compressing laser pulses that have been previously stretched and amplified. This chirped grating is generated through the interaction of chirped pump laser pulses in a plasma slab. Particle-in-cell (PIC) simu…

[Phys. Rev. E 110, 015209] Published Tue Jul 30, 2024

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

Bulk viscosity of a plasma consisting of strongly coupled diatomic ions is computed using molecular dynamics simulations. The simulations are based on the rigid rotor one-component plasma, which is introduced as a model system that adds two degrees of molecular rotation to the traditional one-compon…

[Phys. Rev. E 110, 015208] Published Fri Jul 26, 2024

Author(s): T. Q. Thelen, D. A. Rehn, C. J. Fontes, and C. E. Starrett

In a dense plasma environment, the energy levels of an ion shift relative to the isolated ion values. This shift is reflected in the optical spectrum of the plasma and can be measured in, for example, emission experiments. In this work we use a recently developed method of modeling electronic states…

[Phys. Rev. E 110, 015207] Published Wed Jul 24, 2024

Author(s): W. Fox, G. Fiksel, D. B. Schaeffer, and J. Griff-McMahon

Proton deflectometry is used in magnetized high-energy-density plasmas to observe electromagnetic fields. We describe a reconstruction algorithm to recover the electromagnetic fields from proton fluence data in 1-D. The algorithm is verified against analytic solutions and applied to example data. Ne…

[Phys. Rev. E 110, 015206] Published Thu Jul 18, 2024

Author(s): L. Saikia, S. Adhikari, S. R. Mohanty, and D. Bhattacharjee

Improvement in the functionality of an inertial electrostatic confinement fusion (IECF) device has been investigated through kinetic simulation. Previously, we achieved a neutron generation rate of 106 neutrons per second, but higher rates and better plasma confinement are necessary for broader appl…

[Phys. Rev. E 110, 015203] Published Mon Jul 15, 2024

Author(s): Gert Brodin and Haidar Al-Naseri

We use a recently developed a kinetic model derived from the Dirac equation to study electromagnetic wave propagation in superstrong magnetic fields, such as in magnetars, where relativistic Landau quantization is prominent. The leading contribution to the conductivity tensor in such a plasma is cal…

[Phys. Rev. E 110, 015204] Published Mon Jul 15, 2024

Author(s): Wataru Ishizaki and Kunihito Ioka

We investigate parametric decay instability (PDI) of circularly polarized Alfvén wave into daughter acoustic wave and backward Alfvén wave in magnetically dominated plasma, in which the magnetization parameter σ (energy density ratio of background magnetic field to matter) exceeds unity. We analyze …

[Phys. Rev. E 110, 015205] Published Mon Jul 15, 2024

Author(s): Hui Chen, D. T. Woods, W. A. Farmer, N. A. Aybar, D. A. Liedahl, S. A. MacLaren, M. B. Schneider, H. A. Scott, D. E. Hinkel, O. L. Landen, J. D. Moody, M. D. Rosen, J. S. Ross, S. Rogers, N. Roskopf, G. F. Swadling, and S. Vonhof

The predicted implosion performance of deuterium-tritium fuel capsules in indirect-drive inertial confinement fusion experiments relies on precise calculations of the x-ray drive in laser-heated cavities (hohlraums). This requires accurate, spectrally dependent simulations of laser to x-ray conversi…

[Phys. Rev. E 110, L013201] Published Mon Jul 15, 2024

Author(s): Cheng Gao, Yongjun Li, Fengtao Jin, Jiaolong Zeng, and Jianmin Yuan

A theoretical model for investigating the radiative transfer of an x-ray free electron laser (XFEL) pulse is developed based on a one-dimensional radiative transfer equation. The population dynamics of energy levels is obtained by rate equation approximation coupling with the Fokker-Planck equation,…

[Phys. Rev. E 110, 015201] Published Tue Jul 02, 2024

Author(s): Nadine Wetta and Jean-Christophe Pain

We present electron transport calculations of shocked argon based on an average-atom modeling of the plasma and compare them with measurements, involving both incident and reflected shock waves. Since the corresponding experiments are subject to a 5 T magnetic field, the impact of the latter on the …

[Phys. Rev. E 110, 015202] Published Tue Jul 02, 2024

Author(s): Krzysztof Dzierżęga, Franciszek Sobczuk, Tomasz Krehlik, and Evgeny Stambulchik

We report on experimental and theoretical studies on the Stark profile of the He ii Paschen-α line over a wide range of plasma parameters. This line was emitted from a laser-induced plasma with electron densities in the range of 8.1×1022–4.46×1024m−3 and electron temperatures of 1.2–7.6eV as indepen…

[Phys. Rev. E 109, 065214] Published Thu Jun 27, 2024

Author(s): Tian-Xing Hu, Dong Wu, Z. M. Sheng, and J. Zhang

The normal modes, i.e., the eigensolutions to the dispersion relation equation, are the most fundamental properties of a plasma. The real part indicates the intrinsic oscillation frequency while the imaginary part the Landau damping rate. In most of the literature, the normal modes of quantum plasma…

[Phys. Rev. E 109, 065213] Published Mon Jun 24, 2024

Author(s): Da-Chao Deng and Hui-Chun Wu

An efficient plasma compression scheme using azimuthally polarized light is proposed. Azimuthally polarized light possesses a donutlike intensity pattern, enabling it to compress and accelerate ions toward the optical axis across a wide range of parameters. When the light intensity reaches the relat…

[Phys. Rev. E 109, 065211] Published Thu Jun 20, 2024

Author(s): Nichen Yu, Dong Huang, and Yan Feng

The analytical expression for the conditions of the solid-fluid phase transition, i.e., the melting curve, for two-dimensional (2D) Yukawa systems is derived theoretically from the isomorph theory. To demonstrate that the isomorph theory is applicable to 2D Yukawa systems, molecular dynamical simula…

[Phys. Rev. E 109, 065212] Published Thu Jun 20, 2024

Author(s): S. Yu. Gus'kov and G. A. Vergunova

Shock-ignition effect in indirect-drive thermonuclear target is demonstrated on the base of numerical simulations. Thermonuclear gain (in relation to laser pulse energy) of a shock-ignited indirect-drive thermonuclear capsule is obtained, which is 22.5 times higher than that at a traditional spark i…

[Phys. Rev. E 109, 065209] Published Fri Jun 14, 2024

Author(s): Michael L. Nastac, Robert J. Ewart, Wrick Sengupta, Alexander A. Schekochihin, Michael Barnes, and William D. Dorland

This paper investigates, by means of an analytically solvable one-dimensional model, the dissipation in a turbulent, nearly collisionless plasma. When applying a stochastic, external electric field, it is reported that the generalized entropy of the distribution function cascades from large to small scales in position and velocity space, rendering the stochastic heating irreversible.

[Phys. Rev. E 109, 065210] Published Fri Jun 14, 2024

Author(s): Jiajun Li, Hanchen Xue, Zhaohua Wang, Xianzhi Wang, Jiawen Li, Yingfeng Li, Guodong Zhao, and Zhiyi Wei

Here a mechanism for self-compression of laser pulses is presented, based on period density-modulated plasma. In this setup, two pump beams intersect at a small angle within the plasma. This interaction is facilitated by the ponderomotive ion mechanism, which causes a modulation in the density of pl…

[Phys. Rev. E 109, 065208] Published Thu Jun 13, 2024

Author(s): R. Liotard, B. Canaud, A. Pineau, A. Sollier, E. Lescoute, A. Colaïtis, and G. Duchateau

Laser direct drive (LDD) inertial confinement fusion (ICF) involves irradiating a spherical target of thermonuclear fuel coated with an ablator, usually made of polystyrene. Laser energy absorption near the target surface leads to matter ablation, hydrodynamic shocks, and ultimately capsule implosio…

[Phys. Rev. E 109, 065207] Published Wed Jun 12, 2024

Author(s): F. Garcia-Rubio, V. Tranchant, E. C. Hansen, A. Reyes, R. Tabassum, H. U. Rahman, P. Ney, E. Ruskov, and P. Tzeferacos

The temporal evolution of weak shocks in radiative media is theoretically investigated in this work. The structure of radiative shocks has traditionally been studied in a stationary framework. Their systematic classification is complex because layers of optically thick and thin regions alternate to …

[Phys. Rev. E 109, 065206] Published Mon Jun 10, 2024

Author(s): Qianyi Ma, Jiaxin Liu, Zhuo Pan, Xuezhi Wu, Huangang Lu, Zhenan Wang, Yuhui Xia, Yuekai Chen, Kyle G. Miller, Xinlu Xu, and Xueqing Yan

Collision between relativistic electron sheets and counterpropagating laser pulses is recognized as a promising way to produce intense attosecond x rays through coherent Thomson backscattering (TBS). In a double-layer scheme, the electrons in an ultrathin solid foil are first pushed out by an intens…

[Phys. Rev. E 109, 065205] Published Thu Jun 06, 2024