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Electromagnetic field configurations with vanishing Lorentz force density are known as force-free and appear in terrestrial, space, and astrophysical plasmas. We explore a general method for finding such configurations based on formulating…

Mathematical Physics · Physics 2017-10-31 Geoffrey Compère , Samuel E. Gralla , Alexandru Lupsasca

In diffuse molecular clouds, possible precursors of star-forming clouds, the effect of the magnetic field is unclear. In this work we compare the orientations of filamentary structures in the Polaris Flare, as seen through dust emission by…

Astrophysics of Galaxies · Physics 2016-08-24 G. V. Panopoulou , I. Psaradaki , K. Tassis

We measured polarized dust emission at 350um towards the high-mass star forming massive dense clump IRAS 20126+4104 using the SHARC II Polarimeter, SHARP, at the Caltech Submillimeter Observatory. Most of the observed magnetic field vectors…

Magnetic fusion devices operate at regimes characterized by extremely high temperatures and low densities, for which the charged particles motion is well described by classical mechanics. This is not true, however, for solid-state metallic…

Plasma Physics · Physics 2015-06-23 Giovanni Manfredi , Jérôme Hurst

Relativistic magnetic turbulence has been proposed as a process for producing nonthermal particles in high-energy astrophysics. Particle energization may be contributed by both magnetic reconnection and turbulent fluctuations, but their…

High Energy Astrophysical Phenomena · Physics 2024-12-18 Divjyot Singh , Omar French , Fan Guo , Xiaocan Li

Plasmas that are strongly magnetized in the sense that the gyrofrequency exceeds the plasma frequency exhibit novel transport properties that are not well understood. As a representative example, we compute the friction force acting on a…

Plasma Physics · Physics 2021-08-11 Louis Jose , Scott D. Baalrud

It is the purpose of this paper to give a characterisation of circular light rays in a plasma on an axially symmetric and stationary spacetime. We restrict to the case of an unmagnetised, pressure-free electron-ion plasma and we assume that…

General Relativity and Quantum Cosmology · Physics 2025-10-30 Volker Perlick

We report the highest spatial resolution measurement of magnetic fields in M17 using thermal dust polarization taken by SOFIA/HAWC+ centered at 154 $\mu$m wavelength. Using the Davis-Chandrasekhar-Fermi method, we found the presence of…

It is demonstrated that targets with a broken rotational symmetry may facilitate generation of a strong axial (poloidal) magnetic field. An intense laser beam irradiating such a target creates intense electron currents carrying vorticity…

Plasma Physics · Physics 2017-04-05 Ph. Korneev , V. Tikhonchuk , E. d'Humières

Magnetic particles underpin a broad range of technologies, from water purification and mineral processing to bioseparations and targeted drug delivery. The dynamics of magnetic particles in high-gradient magnetic fields-encompassing both…

Statistical Mechanics · Physics 2026-05-14 Marko Tesanovic , Daniel M. Markiewitz , Marcus L. Popp , Martin Z. Bazant , Sonja Berensmeier

Relativistic collisionless shocks are associated with efficient particle acceleration when propagating into weakly magnetized homogeneous media; as the magnetization increases, particle acceleration becomes suppressed. We demonstrate that…

High Energy Astrophysical Phenomena · Physics 2023-04-26 Camilia Demidem , Joonas Nättilä , Alexandra Veledina

Magnetic reconnection is a process whereby magnetic field lines in different directions "reconnect" with each other, resulting in the rearrangement of magnetic field topology together with the conversion of magnetic field energy into the…

In this paper, the central concern is to analyze the influence of the forces that controls the ion dynamics inside a magnetized plasma sheath under collisionless conditions. The ionization effects are considered within the sheath. The…

Plasma Physics · Physics 2022-05-16 S. Adhikari , R. Moulick , K. S. Goswami

We present a theory for the estimation of a scalar or a vector magnetic field by its influence on an ensemble of trapped spin polarized atoms. The atoms interact off-resonantly with a continuous laser field, and the measurement of the…

Quantum Physics · Physics 2009-11-10 Vivi Petersen , Lars Bojer Madsen , Klaus Molmer

We develop protocols to confine charged particles using time-varying magnetic fields and demonstrate the possible non-torus configuration resulting from the distribution of single-particle motion orbits. A two-step strategy is proposed to…

Plasma Physics · Physics 2023-11-30 Shao-Wu Yao , Bo You , Yue-Hao Yin , Zhi-Yong Wu , Li-Xiang Cen

A novel plasma state has been found in the presence of a uniform applied axial magnetic field in periodic cylindrical geometry. This state is driven electrostatically by helical electrodes, providing a driving field that depends on radius…

Plasma Physics · Physics 2017-08-15 Cihan Akçay , John M. Finn , Richard A. Nebel , Daniel C. Barnes

A stationary self-consistent outflow of a magnetised relativistic plasma from a rotating object with an initially monopole-like magnetic field is investigated in the ideal MHD approximation under the condition $\sigma/U_0^2 >1$, where…

Astrophysics · Physics 2009-11-06 S. Bogovalov

A tens of Tesla quasi-static axial magnetic field can be produced in the interaction of a short intense laser beam carrying an Orbital Angular Momentum with an underdense plasma. Three-dimensional "Particle In Cell" simulations and…

Plasma Physics · Physics 2018-10-03 R. Nuter , Ph. Korneev , I. Thiele , V. Tikhonchuk

In a classical ideal plasma, a magnetic field is known to reduce the heat conductivity perpendicular to the field whereas it does not alter the one along the field. Here we show that, in strongly correlated plasmas that are observed at high…

Plasma Physics · Physics 2015-12-16 Torben Ott , Michael Bonitz , Zoltan Donko

Relativistic plasmas in strong electromagnetic fields exhibit distinct properties compared to classical plasmas. In astrophysical environments, such as neutron stars, white dwarfs, AGNs, and shocks, relativistic plasmas are pervasive and…

Plasma Physics · Physics 2025-04-15 Pablo J. Bilbao , Thales Silva , Luis O. Silva
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