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The electron temperature of the plasma is one important aspect of the environment. Electrons created by photoionization or impact ionization of atmospheric gas have energies $\sim$10 eV. In an active comet coma, the gas density is high…

Earth and Planetary Astrophysics · Physics 2018-08-15 Ilka A. D. Engelhardt , Anders I. Eriksson , Erik Vigren , Xavier Valiières , Martin Rubin , Nicholas Gilet , Pierre Henri

If the electrons in a plasma are suddenly heated, the resulting change in Debye shielding causes the ion kinetic energy to quickly increase. For the first time, this correlation heating, which is much faster than collisional energy…

Plasma Physics · Physics 2023-05-08 Thomas E. Foster , Henry Fetsch , Nathaniel J. Fisch

The structure of the hot downstream region below a radiative accretion shock, such as that of an accreting compact object, may oscillate due to a global thermal instability. The oscillatory behaviour depends on the functional forms of the…

Astrophysics · Physics 2009-10-31 Curtis J. Saxton , Kinwah Wu

We use a statistically significant set of measurements to show that the field-aligned electron heat flux $q_\parallel$ in the solar wind at 1 AU is consistent with the Spitzer-H\"{a}rm collisional heat flux $q_{sh}$ for temperature gradient…

Solar and Stellar Astrophysics · Physics 2015-06-15 S. D. Bale , M. Pulupa , C. Salem , C. H. K. Chen , E. Quataert

Hot-cold ablative mixing plasmas are ubiquitous in astrophysical and laboratory systems, where a cold/dense plasma is roughly in pressure balance with a hot/dilute plasma. Examples include the plasma thermal quench during major disruptions…

Plasma Physics · Physics 2025-04-01 Yanzeng Zhang , Xian-Zhu Tang

We present measurements from the ESA/NASA Cluster mission that show in situ acceleration of ions to energies of 1 MeV outside the bow shock. The observed heating can be associated with the presence of electromagnetic structures with strong…

Solar and Stellar Astrophysics · Physics 2013-07-08 K. Stasiewicz , S. Markidis , B. Eliasson , M. Strumik , M. Yamauchi

Context. Photospheric motions shuffle the footpoints of the strong axial magnetic field that threads coronal loops giving rise to turbulent nonlinear dynamics characterized by the continuous formation and dissipation of field-aligned…

Solar and Stellar Astrophysics · Physics 2012-08-14 R. B. Dahlburg , G. Einaudi , A. F. Rappazzo , M. Velli

A statistical-type model is developed to describe the ion production and electron emission in collisions of (molecular) ions with atoms. The model is based on the Boltzmann population of the bound electronic energy levels of the quasi…

Atomic Physics · Physics 2016-08-19 Zoltán Juhász

We report on the experimental observation of electron heating in electron-only magnetic reconnection in laser-driven laboratory mini-magnetospheres on the Large Plasma Device (LAPD) at the University of California, Los Angeles. In this…

We report on the direct observation of the thermoelectric transport in a nondegenerate correlated electron system formed on the surface of liquid helium. We find that the microwave-induced excitation of the vertical transitions of electrons…

Other Condensed Matter · Physics 2021-11-10 Ivan Kostylev , A. A. Zadorozhko , M. Hatifi , Denis Konstantinov

A 2D slab approximation of the interactions of electrons with intense linearly polarized laser radiation and static electric and magnetic fields is widely used for both numerical simulations and simplified semi-analytical models. It is…

Plasma Physics · Physics 2018-02-02 Yanzeng Zhang , S. I. Krasheninnikov

Density and temperature conditions in the solar core suggest that the microscopic diffusion of electrons and ions could be nonstandard: Diffusion and friction coefficients are energy dependent, collisions are not two-body processes and…

Astrophysics · Physics 2015-06-24 G. Kaniadakis , A. Lavagno , M. Lissia , P. Quarati

The dynamics of relativistic electrons in the intense laser radiation and quasi-static electromagnetic fields both along and across to the laser propagating direction are studied in the 3/2 dimensional Hamiltonian framework. It is shown…

Plasma Physics · Physics 2022-11-01 Yanzeng Zhang , S. I. Krasheninnikov , Alexey Knyazev

Nonrelativistic electrostatic unmagnetized shocks are frequently observed in laboratory plasmas and they are likely to exist in astrophysical plasmas. Their maximum speed, expressed in units of the ion acoustic speed far upstream of the…

Plasma Physics · Physics 2015-06-15 ME Dieckmann , H Ahmed , G Sarri , D Doria , I Kourakis , L Romagnani , M Pohl , M Borghesi

Local (shearing box) simulations of the nonlinear evolution of the magnetorotational instability in a collisionless plasma show that angular momentum transport by pressure anisotropy ($p_\perp \ne p_\parallel$, where the directions are…

Astrophysics · Physics 2011-02-11 Prateek Sharma , Eliot Quataert , Gregory W. Hammett , James M. Stone

Although thermal pressure is unimportant dynamically in most molecular gas, the temperature is an important diagnostic of dynamical processes and physical conditions. This is the first of two papers on thermal equilibrium in molecular…

Astrophysics · Physics 2009-10-31 Paolo Padoan , ; Ellen Zweibel , ; AAke Nordlund

A two-dimensional particle-in-cell simulation is performed to investigate weakly magnetized perpendicular shocks with a magnetization parameter of 6 x 10^-5, which is equivalent to a high Alfv\'en Mach number M_A of ~130. It is shown that…

High Energy Astrophysical Phenomena · Physics 2010-09-03 Tsunehiko N. Kato , Hideaki Takabe

We study electron heating in collisionless current-driven turbulence due to the nonlinear interactions between electron- and ion-acoustic waves. PIC simulation results show that due to a large difference between the electron and ion mean…

Plasma Physics · Physics 2022-08-02 Jian Chen , Alexander V. Khrabrov , Igor D. Kaganovich , He-Ping Li

In the majority of the literature on plasma shock waves, electrons play the role of "ghost particles," since their contribution to mass and momentum flows is negligible, and they have been treated as only taking care of the electric plasma…

Space Physics · Physics 2015-06-22 Hans J. Fahr , John D. Richardson , Daniel Verscharen

The plasma heating during collisionless magnetic reconnection is investigated using particle-in-cell simulations. We analyze the time evolution of the plasma temperature associated with the motion of the reconnecting flux tube, where the…

High Energy Astrophysical Phenomena · Physics 2018-11-28 Masahiro Hoshino
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