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Numerical simulations of magnetosonic wave formation driven by an expanding cylindrical piston are performed to get better physical insight into the initiation and evolution of large-scale coronal waves. Several very basic initial…

太阳与恒星天体物理 · 物理学 2015-06-15 S. Lulić , B. Vršnak , T. Žic , I. W. Kienreich , N. Muhr , M. Temmer , A. M. Veronig

A beam of super-thermal, hot electrons was injected into maxwellian plasma with a density gradient along a magnetic field line. 1.5D particle-in-cell simulations were carried out which established that the EM emission is produced by the…

太阳与恒星天体物理 · 物理学 2014-04-07 Roman Pechhacker , David Tsiklauri

In rotating stars and planets, excitation of inertial waves in convective envelopes provides an important channel for tidal dissipation, but the dissipation rate due to inertial waves depends erratically on the tidal frequency. Tidal…

流体动力学 · 物理学 2021-09-29 Yufeng Lin , Gordon I. Ogilvie

To date, axisymmetric internal wave fields, which have relevance to atmospheric internal wave fields generated by storm cells and oceanic near-inertial wave fields generated by surface storms, have been experimentally realized using an…

流体动力学 · 物理学 2020-12-25 Samuel Boury , Thomas Peacock , Philippe Odier

Elementary excitations in a paramagnetic semiconductor quantum well confined to a cylindrical surface are theoretically studied on the basis of coupled spin-charge drift-diffusion equations. The electric-field-mediated eigenmodes are…

材料科学 · 物理学 2009-11-13 P. Kleinert

Electron acceleration by a high-power Laguerre-Gaussian pulse in a micro-plasma waveguide is investigated. When the incident laser travels in the waveguide, electrons on the wall are extracted into the vacuum core and accelerated by the…

等离子体物理 · 物理学 2025-06-19 Xinju Guo , Longqing Yi

Recent study has demonstrated that electron cyclotron harmonic (ECH) waves can be excited by a low energy electron beam. Such waves propagate at moderately oblique wave normal angles (~70). The potential effects of beam-driven ECH waves on…

等离子体物理 · 物理学 2024-06-04 Xu Zhang , Xin An , Vassilis Angelopoulos , Anton Artemyev , Xiao-Jia Zhang , Ying-Dong Jia

It is shown that pulsar radio emission can be generated effectively through a streaming motion in the polar-cap regions of a pulsar magnetosphere causing nonresonant growth of waves that can escape directly. As in other beam models, a…

天体物理学 · 物理学 2009-11-07 M. Gedalin , E. Gruman , D. B. Melrose

We present a microscopic theory on the observation of a beating pattern in the radiation-induced magnetoresistance oscillations at very low magnetic field. We con- sider that such a beating pattern develops as a result of the coupling…

介观与纳米尺度物理 · 物理学 2018-06-13 Jesus Inarrea

We have detected the presence of very high intensity surface waves that are excited during plasma waveguided laser wakefield acceleration. Wakefield acceleration can be enchanced by the introduction of an ``all optical" plasma waveguide…

Runaway electrons are known to provide robust ideal or collisionless kinetic drive for plasma wave instabilities in both the whistler and slow-X branches, via the anomalous Doppler-shifted cyclotron resonances. In a cold and dense…

等离子体物理 · 物理学 2025-06-24 Qile Zhang , Yanzeng Zhang , Xian-Zhu Tang

The excitation of electromagnetic (EM) wake waves in electron plasma by an one-dimensional bunch of charged particles has been considered in the presence of intense monochromatic circularly polarized electromagnetic (CPEM) pump wave. In the…

等离子体物理 · 物理学 2007-05-23 S. S. Elbakian , H. B. Nersisyan

A nonlinear beatwave regime of plasma wave excitation is considered. Two beatwave drivers are considered: intensity-modulated laser pulse and density-modulated (microbunched) electron beam. It is shown that a long beatwave pulse can excite…

等离子体物理 · 物理学 2008-11-26 Gennady Shvets

Radio-frequency discharges are performed in low magnetic fields (0-10 mT) using three types of helicon-wave exciting antennas with the azimuthal mode number of $|m|$ = 1. The most pronounced peak of plasma density is generated in the case…

等离子体物理 · 物理学 2007-05-23 Genta Sato , Wataru Oohara , Rikizo Hatakeyama

Starting from the Vlasov-Maxwell equations describing the dynamics of various species in a quasi-neutral plasma immersed in an external solenoidal magnetic field and utilizing a technique known as the hydrodynamic substitution, a…

等离子体物理 · 物理学 2024-02-28 Stephan I. Tzenov

It is argued that the polar gap and flux tube in the pulsar magnetosphere act as a resonant cavity/waveguide system which is excited by oscillations in the primary beam current and accelerating potential. The modes will be converted,…

天体物理学 · 物理学 2007-05-23 Matthew D. T. Young

The problem of standing wave formation by superposing two counter-propagating whistler waves in an overdense plasma, studied recently by Sano et al. (Phys. Rev. E 100, 053205 (2019) and Phys. Rev. E 101, 013206 (2020)), has been revisited…

等离子体物理 · 物理学 2021-10-27 Mithun Karmakar , Sudip Sengupta , Bhavesh Patel

We review the modulation stability of parallel propagating/field aligned Whistler Mode Chorus waves propagating in a warm plasma from a formal perspective with a focus on wave-particle interactions. The modulation instability criteria is…

等离子体物理 · 物理学 2023-05-26 Daniel Ratliff , Oliver Allanson

We consider a two-level atomic system, interacting with an electromagnetic field controlled in amplitude and frequency by a high intensity laser. We show that the amplitude of the induced electric field, admits an envelope profile…

斑图形成与孤子 · 物理学 2016-08-24 Jingsong He , Shuwei Xu , K. Porsezian , Yi Cheng , P. Tchofo Dinda

A review is given for cyclotron resonant interactions in space plasmas. After giving a simple formulation for the test particle approach, illustrative examples for resonant interactions are given. It is shown that for obliquely propagating…

高能天体物理现象 · 物理学 2012-11-14 T. Terasawa , S. Matsukiyo