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We report on first evidence of wave activity during neutral beam heating in KSTAR plasmas: 40 kHz magnetic fluctuations with a toroidal mode number of n=1. Our analysis suggests this a beta-induced Alfven eigenmode resonant with the q=1…

等离子体物理 · 物理学 2015-06-12 M. J. Hole , C. M. Ryu , M. H. Woo , J. G. Bak , S E. Sharapov , M. Fitzgerald , the KSTAR team

The theory of the electron relaxation in metals excited by an ultrashort optical pump is developed on the basis of the solution of the linearized kinetic equation. The kinetic equation includes both the electron-electron and the…

强关联电子 · 物理学 2014-03-06 V. V. Baranov , V. V. Kabanov

We explore a mechanism, entirely new to the fast solar wind, of electron heating by lower hybrid waves to explain the shift to higher charge states observed in various elements in the fast wind at 1 A.U. relative to the original coronal…

天体物理学 · 物理学 2009-11-10 J. Martin Laming

We observe that high-Q electromagnetic cavity resonances increase the cyclotron cooling rate of pure electron plasmas held in a Penning-Malmberg trap when the electron cyclotron frequency, controlled by tuning the magnetic field, matches…

We use 2D particle-in-cell (PIC) simulations to study the effect of the saturated whistler instability on the viscous heating and nonthermal acceleration of electrons in a shearing, collisionless plasma with a growing magnetic field,…

高能天体物理现象 · 物理学 2017-12-06 Mario Riquelme , Alvaro Osorio , Eliot Quataert

In continuation of previous work, numerical results are presented, concerning relativistically counter-streaming plasmas. Here, the relativistic mixed mode instability evolves through, and beyond, the linear saturation -- well into the…

等离子体物理 · 物理学 2008-11-26 Jacob Trier Frederiksen , Mark Eric Dieckmann

The long-time evolution of the two-stream instability of a cold ion beam pulse propagating though the background plasma is investigated using a large-scale one-dimensional electrostatic kinetic simulation. The three stages of the…

等离子体物理 · 物理学 2018-02-14 Kentaro Hara , Igor D. Kaganovich , Edward A. Startsev

In this paper the superheating of electron plasma by femtosecond laser pulses is investigated. With Heaviside thermal equation (Lasers in Engineering, 12, (2002), p.17) the generation of superhot electrons is described. It is shown that in…

凝聚态物理 · 物理学 2007-05-23 J. Marciak-Kozlowska , M. Kozlowski

Using particle-in-cell simulations to study fast radio burst (FRB) propagation in a tenuous plasma, we identified a novel mechanism that occurs during the growth of turbulent magnetic loops: electron penetration acceleration. The loops have…

等离子体物理 · 物理学 2025-06-02 Zheng Gong , Sida Cao , Caleb Redshaw , Matthew R. Edwards

We report analytical and numerical investigations of sub-ion-scale turbulence in low-beta plasmas, focusing on the spectral properties of the fluctuations and electron heating. In the isothermal limit, the numerical results strongly support…

高能天体物理现象 · 物理学 2022-08-05 Muni Zhou , Zhuo Liu , Nuno F. Loureiro

In this paper, we report a new type of instability of electron holes (EHs) interacting with passing ions. The nonlinear interaction of EHs and ions is investigated using a new theory of hole kinematics. It is shown that the oscillation in…

等离子体物理 · 物理学 2017-11-15 Chuteng Zhou , Ian H. Hutchinson

This study explores the generation of Electrostatic (ES) Electron Kelvin-Helmholtz instability (EKHI) in collisionless plasma with a step-function electron velocity shear akin to that developed in the electron diffusion region in magnetic…

等离子体物理 · 物理学 2025-03-04 H. Che

We present test-particle simulations of electrons during a nonlinear MHD simulation of a type-I edge localized mode (ELM) to explore the effect of an eruptive plasma filament on the kinetic level. The electrons are moderately heated and…

等离子体物理 · 物理学 2022-11-23 Heinz Isliker , Andres Cathey , Matthias Hoelzl , Stanislas Pamela , Loukas Vlahos

We present a study of energetic-electron trapping and acceleration in the Kelvin-Helmholtz-induced magnetohydrodynamic (MHD) turbulence of post-flare loops in the solar corona. Using the particle-tracing capabilities of MPI-AMRVAC 3.0, we…

太阳与恒星天体物理 · 物理学 2024-03-13 Fabio Bacchini , Wenzhi Ruan , Rony Keppens

The higher the energy of a particle is above equilibrium the faster it relaxes due to the growing phase-space of available electronic states it can interact with. In the relaxation process phase coherence is lost, thus limiting high energy…

The electron dynamics and the mechanisms of power absorption in radio-frequency (RF) driven, magnetically enhanced capacitively coupled plasmas (MECCPs) at low pressure are investigated. The device in focus is a geometrically asymmetric…

We present a theoretical description of the phase dynamics and its corresponding electrodynamics in a stack of inductively coupled intrinsic Josephson junctions of layered high-$T_c$ superconductors in the absence of an external magnetic…

超导电性 · 物理学 2011-11-10 Shizeng Lin , Xiao Hu

Electron-acoustic waves occur in space and laboratory plasmas where two distinct electron populations exist, namely cool and hot electrons. The observations revealed that the hot electron distribution often has a long-tailed suprathermal…

等离子体物理 · 物理学 2017-10-24 Ashkbiz Danehkar

This work explores for the first time bump-on-tail (BOT) instability excited by energetic electrons in helicon plasma. The Berk-Breizman model that developed for the wave-particle interaction and resulted instability in magnetic fusion is…

The lower hybrid wave trapping in a tokamak edge transport barrier is predicted. This effect makes possible excitation of the low-power-threshold absolute parametric decay instability leading to side-scattering of the ordinary microwave…

等离子体物理 · 物理学 2021-09-29 E. Z. Gusakov , A. Yu. Popov