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We briefly review the recent developments in magnetohydrodynamics, which in particular deal with the evolution of magnetic fields in turbulent plasmas. We especially emphasize (i) the necessity of renormalizing equations of motion in…

等离子体物理 · 物理学 2025-05-01 Amir Jafari

In magnetohydrodynamic (MHD) turbulence, the large-scale magnetic field sets a preferred local direction for the small-scale dynamics, altering the statistics of turbulence from the isotropic case. This happens even in the absence of a…

等离子体物理 · 物理学 2017-05-10 Vladimir Zhdankin , Stanislav Boldyrev , Joanne Mason

We present a general expression for the probability distribution function of electric field in a plasma cloud formed by the impact of a laser pulse on a gas or a solid body. We also present the results of numerical calculation of this…

等离子体物理 · 物理学 2022-04-21 S. Ya. Bronin , E. V. Vikhrov , B. B. Zelener , B. V. Zelener

The efficiency of particle acceleration at shock waves in relativistic, magnetized astrophysical outflows is a debated topic with far-reaching implications. Here, for the first time, we study the impact of turbulence in the pre-shock…

高能天体物理现象 · 物理学 2023-07-06 Virginia Bresci , Martin Lemoine , Laurent Gremillet

It is known that a plasma in a magnetic field, conceived microscopically as a system of point charges, can exist in a magnetized state, and thus remain confined, inasmuch as it is in an ordered state of motion, with the charged particles…

数学物理 · 物理学 2015-06-04 A. Carati , M. Zuin , A. Maiocchi , M. Marino , E. Martines , L. Galgani

A complete theory for the complex interaction between solar energetic particles and the turbulent interplanetary magnetic field remains elusive. In this work we aim to contribute towards such a theory by modelling the propagation of solar…

空间物理 · 物理学 2019-02-27 R. D. Strauss , J. A. le Roux

Plasma turbulence is the dominant transport mechanism for heat and particles in magnetized plasmas in linear devices and tokamaks, so the study of turbulence is important in limiting and controlling this transport. Linear devices provide an…

等离子体物理 · 物理学 2017-11-17 Jarrod Leddy , Ben Dudson

One of the main applications in plasma physics concerns the energy production through thermo-nuclear fusion. The controlled fusion is achieved by magnetic confinement i.e., the plasma is confined into a toroidal domain (tokamak) under the…

偏微分方程分析 · 数学 2015-06-05 Mihai Bostan , Irene M. Gamba

In this study, we utilize intense laser pulses and advanced quantum mechanical frameworks to investigate the behavior of high-velocity electrons within magnetized plasma environments. The focus of our research is placed within the context…

等离子体物理 · 物理学 2024-12-31 B. S. Sharma , Garima Yadav , N. K. Jaiman , D. N. Gupta

The energy production through thermo-nuclear fusion requires the confinement of the plasma into a bounded domain. In most of the cases, such configurations are obtained by using strong magnetic fields. Several models exist for describing…

偏微分方程分析 · 数学 2012-07-11 Mihai Bostan

The propagation of surface electromagnetic waves along a uniform magnetic field is studied in a quantum electron-hole semiconductor plasma. A new forward propagating mode, not reported before, is found by the effect of quantum tunneling,…

等离子体物理 · 物理学 2015-03-19 A. P. Misra

The spin effects on electromagnetic waves in a strongly magnetized plasma with rare collisions is considered with the help of relativistic kinetic equations, which takes into account the electron spin dynamics in the selfconsistent electric…

高能物理 - 唯象学 · 物理学 2007-05-23 V. N. Oraevsky , V. B. Semikoz , A. S. Volokitin

Electromagnetic (EM) waves/disturbances are typically the best means to understand and analyze an ionized medium like plasma. However, the propagation of electromagnetic waves with frequency lower than the plasma frequency is prohibited by…

等离子体物理 · 物理学 2020-02-25 Sharad Kumar Yadav , Ratan Kumar Bera , Deepa Verma , Amita Das , Predhiman Kaw

We consider a stochastic differential equation for a charged particle in a stochastic magnetic field, known as A-Langevin equation. The solution of the equation is found, and the Lagrange velocity correlation function is calculated in…

混沌动力学 · 物理学 2007-05-23 D. Lesnik , S. Gordienko , M. Neuer , K. -H. Spatschek

The author presents a model for variability of the flux and polarization of blazars in which turbulent plasma flowing at a relativistic speed down a jet crosses a standing conical shock. The shock compresses the plasma and accelerates…

高能天体物理现象 · 物理学 2015-06-18 Alan P. Marscher

Using in situ data, accumulated in the turbulent magnetosheath by the Magnetospheric Multiscale (MMS) Mission, we report a statistical study of magnetic field curvature and discuss its role in the turbulent space plasmas. Consistent with…

Numerical simulations of dispersive turbulence in magnetized plasmas based on the Hall-MHD description are presented, assuming spatial variations along a unique direction making a prescribed angle with the ambient magnetic field. Main…

地球与行星天体物理 · 物理学 2015-05-18 D. Laveder , L. Marradi , T. Passot , P. L. Sulem

We present a phenomenological and numerical study of strong Alfv\'enic turbulence in a magnetically dominated collisionless relativistic plasma with a strong background magnetic field. In contrast with the non-relativistic case, the energy…

等离子体物理 · 物理学 2023-06-06 Cristian Vega , Stanislav Boldyrev , Vadim Roytershteyn

By means of a fully kinetic simulation of freely decaying plasma turbulence, we study the spectral properties and the energy exchanges characterizing the turbulent cascade in the kinetic range. We find that the magnetic field spectrum…

等离子体物理 · 物理学 2022-11-30 Giuseppe Arrò , Francesco Califano , Giovanni Lapenta

Tokamak disruptions are associated with breaking magnetic surfaces, which makes magnetic field lines chaotic in large regions of the plasma. The enforcement of quasi-neutrality in a region of chaotic field lines requires an electric…

等离子体物理 · 物理学 2024-09-04 Allen H Boozer