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Electron and ion energization (i.e., heating and nonthermal acceleration) is a fundamental, but poorly understood, outcome of plasma turbulence. In this work, we present new results on this topic from particle-in-cell simulations of driven…

高能天体物理现象 · 物理学 2019-02-13 Vladimir Zhdankin , Dmitri A. Uzdensky , Gregory R. Werner , Mitchell C. Begelman

Limiting structure of thermodynamic functions of gaseous plasmas is under consideration in the limit of zero temperature and density. Remarkable tendency, which was claimed previously (Iosilevskiy and Gryaznov, 1985) is carried to extreme.…

等离子体物理 · 物理学 2015-05-19 Igor Iosilevskiy

Electron heating in an ultracold neutral plasma is modeled using classical molecular dynamics simulations in the presence of an externally applied magnetic field. A sufficiently strong magnetic field is found to reduce disorder induced…

等离子体物理 · 物理学 2018-02-14 Sanat Kumar Tiwari , Scott D. Baalrud

Fast, counter-streaming plasma outflows drive magnetic field amplification, plasma heating, and particle acceleration in numerous astrophysical environments, from supernova remnant shocks to active galactic nuclei jets. Understanding how,…

等离子体物理 · 物理学 2026-01-28 Alexis Marret , Frederico Fiuza

Brown, Preston, and Singleton (BPS) produced an analytic calculation for energy exchange processes for a weakly to moderately coupled plasma: the electron-ion temperature equilibration rate and the charged particle stopping power. These…

等离子体物理 · 物理学 2009-06-26 Lowell S. Brown , Robert L. Singleton

We performed numerical simulations of magnetic reconnection with different strength of magnetic fields from the solar photosphere to the upper chromosphere. The main emphasis is to identify dominant mechanisms for heating plasmas in the…

太阳与恒星天体物理 · 物理学 2025-06-24 Abdullah Zafar , Lei Ni , Kaifeng Kang , Guanchong Cheng , Jing Ye , Jun Lin , Ahmad Ali , Nadia Imtiaz

In collisionless astrophysical plasmas, turbulence mediates the partitioning of free energy among cascade channels and its dissipation into ion and electron heat. The resulting ion heating is often anisotropic, with ions observed to be…

太阳与恒星天体物理 · 物理学 2025-12-04 Zade Johnston , Jonathan Squire

We describe a hybrid molecular dynamics approach for the description of ultracold neutral plasmas, based on an adiabatic treatment of the electron gas and a full molecular dynamics simulation of the ions, which allows us to follow the…

等离子体物理 · 物理学 2009-11-11 T. Pohl , T. Pattard

Strongly magnetized plasmas, characterized by having a gyrofrequency larger than the plasma frequency ($\beta = \omega_c/\omega_p \gg 1$), are known to exhibit novel transport properties. Previous works studying pure electron plasmas have…

等离子体物理 · 物理学 2024-11-12 Louis Jose , James C. Welch , Timothy D. Tharp , Scott D. Baalrud

We study the evolution of ultracold plasmas by measuring the electron temperature. Shortly after plasma formation, competition between heating and cooling mechanisms drives the electron temperature to a value within a narrow range…

原子物理 · 物理学 2009-11-10 J. L. Roberts , C. F. Fertig , M. L. Lim , S. L. Rolston

Starting from the beginning of their research in the early 2000's, the ultracold plasmas were considered as a promising tool to achieve considerable values of the Coulomb coupling parameter for electrons. Unfortunately, this was found to be…

等离子体物理 · 物理学 2023-12-29 Yurii V. Dumin , Anastasiia T. Lukashenko

In the article an ultracold electron-ion plasma created by photoionization of cooled atoms is investigated. We obtained analitical expressions for non-ideality parameters which establish due to correlation heating. In the work the nearest…

等离子体物理 · 物理学 2011-08-01 Anatoli Gavrilyuk

Based on Magnetospheric Multiscale (MMS) observations from the Earth's bow shock, we have identified two plasma heating processes that operate at quasi-perpendicular shocks. Ions are subject to stochastic heating in a process controlled by…

空间物理 · 物理学 2020-11-03 Krzysztof Stasiewicz , Bengt Eliasson

We investigate evolution of the intracluster medium (ICM), considering the relaxation process between the ions and electrons. According to the standard scenario of structure formation, ICM is heated by the shock in the accretion flow to the…

天体物理学 · 物理学 2009-10-30 Motokazu Takizawa

Particles are heated efficiently through energy conversion processes such as shocks and magnetic reconnection in collisionless plasma environments. While empirical scaling laws for the temperature increase have been obtained, the precise…

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…

等离子体物理 · 物理学 2024-09-11 T. Q. Thelen , D. A. Rehn , C. J. Fontes , C. E. Starrett

In a plasma of multiple ion species, thermodynamic forces such as pressure and temperature gradients can drive ion species separation via inter-species diffusion. Unlike its neutral mix counterpart, plasma thermo-diffusion is found…

等离子体物理 · 物理学 2014-05-07 Grigory Kagan , Xian-Zhu Tang

In systems accreting well below the Eddington rate, the plasma in the innermost regions of the disk is collisionless and two-temperature, with the ions hotter than the electrons. Yet, whether a collisionless faster-than-Coulomb energy…

高能天体物理现象 · 物理学 2015-06-23 Lorenzo Sironi , Ramesh Narayan

The collision cross sections (CCS), momentum transfer cross sections (MTCS), or scattering cross sections (SCS) of an electron neutral pair are important components for computing the electric conductivity of a plasma gas. Larger collision…

等离子体物理 · 物理学 2023-10-18 Osama A. Marzouk

The equation of state (EOS) for partially ionized carbon, oxygen, and carbon-oxygen mixtures at temperatures 3\times10^5 K <~ T <~ 3\times10^6 K is calculated over a wide range of densities, using the method of free energy minimization in…

等离子体物理 · 物理学 2011-11-16 G. Massacrier , A. Y. Potekhin , G. Chabrier