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Recent work has made it clear that the ``standard model'' of pulsar radio emission cannot be the full answer. Some fundamental assumptions about the magnetic field and plasma flow in the radio-loud region have been called into question by…

天体物理学 · 物理学 2007-05-23 J. A. Eilek , T. H. Hankins , A. Jessner

Particle acceleration in collisionless plasma systems is a central question in astroplasma and astroparticle physics. The structure of the acceleration regions, electron-ion energy equilibration, preacceleration of particles at shocks to…

高能天体物理现象 · 物理学 2020-02-19 Martin Pohl , Masahiro Hoshino , Jacek Niemiec

Self-consistent multi-particle simulation plays an important role in studying beam-beam effects and space charge effects in high-intensity beams. The Poisson equation has to be solved at each time-step based on the particle density…

加速器物理 · 物理学 2014-10-15 J. Qiang , S. Paret

The quasistatic approximation (QSA) is an efficient method of simulating laser- and beam-driven plasma wakefield acceleration, but it becomes imprecise if some plasma particles make long longitudinal excursions in a strongly nonlinear wave,…

等离子体物理 · 物理学 2023-05-03 P. V. Tuev , R. I. Spitsyn , K. V. Lotov

We study field configurations in a hot quark-gluon plasma with spherical symmetry. We show that the electric fields point into radial direction and solve the effective non-abelian equations of motions. The corresponding charge density has a…

高能物理 - 唯象学 · 物理学 2007-05-23 Herbert Nachbagauer

Plasma instabilities can be encountered in many branches of physics. This work focuses on relativistic plasmas with applications in theoretical astrophysics and particle accelerator physics. Even though these fields seem to be unrelated the…

高能天体物理现象 · 物理学 2009-04-20 Bjoern S. Schmekel

The problem of formulating a thermodynamically-consistent finite internal partition function (IPF) in nonideal hydrogen plasma systems is investigated and analyzed within the chemical picture revealing inaccuracies and inconsistencies…

等离子体物理 · 物理学 2010-10-07 Mofreh R. Zaghloul

Self-consistent approximations in terms of fully dressed propagators provide a simple expression for the entropy of an ultrarelativistic plasma, which isolates the contribution of the elementary excitations as a leading contribution.…

高能物理 - 唯象学 · 物理学 2009-10-31 J. -P. Blaizot , E. Iancu , A. Rebhan

The purpose of the present paper is to provide an overview of Asymptotic-Preserving methods for multiscale plasma simulations by addressing three singular perturbation problems. First, the quasi-neutral limit of fluid and kinetic models is…

等离子体物理 · 物理学 2017-04-05 Pierre Degond , Fabrice Deluzet

The spectral function for an electron one-component plasma is calculated self-consistently using the GW0 approximation for the single-particle self-energy. In this way, correlation effects which go beyond the mean-field description of the…

等离子体物理 · 物理学 2009-11-13 Carsten Fortmann

Plasma impedance probes (PIPs) are a type of RF probe that primarily measure electron density. This work introduces two advancements: a streamlined analytical model for interpreting PIP-monopole measurements and techniques for achieving…

等离子体物理 · 物理学 2023-07-27 John W. Brooks , Erik M. Tejero , Matthew C. Paliwoda , Michael S. McDonald

We point out an important hidden inconsistency in Fermi's probability of the quantum states that engendered inconsistent/inaccurate equations-of-state extensively used in the literature to model nonideal plasma systems. The importance of…

等离子体物理 · 物理学 2015-05-30 Mofreh R. Zaghloul

Scalar cosmological perturbations of a weakly self-interacting plasma mixed with a perfect radiation fluid are investigated. Effects of this plasma are considered through order $\lambda^{3/2}$ of perturbative thermal-field-theory in the…

广义相对论与量子宇宙学 · 物理学 2011-04-15 Dominik J. Schwarz

We study smooth, spherically-symmetric solutions to the Vlasov-Poisson system and relativistic Vlasov-Poisson system in the plasma physical case. In particular, we construct solutions that initially possess arbitrarily small charge…

偏微分方程分析 · 数学 2023-12-05 Kaiwen Tan

Modeling plasmas in terms of atoms or ions is theoretically appealing for several reasons. When it is relevant, the notion of atom or ion in a plasma provides us with an interpretation scheme of the plasma's microscopic structure. From the…

等离子体物理 · 物理学 2024-12-18 Robin Piron

We have obtained the solutions of linearized Shr{\"o}dinger equation for spherically and axially symmetrical electrons density oscillations in plasma in the approximation of the self-consistent field. It was shown that in the center or on…

等离子体物理 · 物理学 2007-05-23 M. Dvornikov , S. Dvornikov , G. Smirnov

A new framework is presented for evaluating the performance of self-consistent field methods in Kohn-Sham density functional theory. The aims of this work are two-fold. First, we explore the properties of Kohn-Sham density functional theory…

计算物理 · 物理学 2019-07-18 Nick Woods , Phil Hasnip , Mike Payne

Plasma wakefield acceleration studies currently rely considerably on simulating this effect numerically using highly specialized software. Exorbitant computational difficulty of the problem requires simplifying models and methods,limiting…

等离子体物理 · 物理学 2017-12-05 P. V. Tuev , A. P. Sosedkin , K. V. Lotov

We study the expansion of ultracold neutral plasmas in the regime in which inelastic collisions are negligible. The plasma expands due to the thermal pressure of the electrons, and for an initial spherically symmetric Gaussian density…

等离子体物理 · 物理学 2009-11-13 S. Laha , P. Gupta , C. E. Simien , H. Gao , J. Castro , T. Pohl , T. C. Killian

A self-consistent determination of the spectral function and the self-energy of electrons in a hot and dense plasma is reported. The self-energy is determined within the approximation of the screened potential. It is shown, that the…

等离子体物理 · 物理学 2009-10-30 A. Wierling , G. Röpke