Results 41 to 50 of about 880 (120)

On a new process for cusp irregularity production [PDF]

open access: yesAnnales Geophysicae, 2008
Two plasma instability mechanisms were thought until 2007 to dominate the formation of plasma irregularities in the F region high latitude and polar ionosphere; the gradient-drift driven instability, and the velocity-shear driven instability.
H. C. Carlson   +3 more
doaj   +1 more source

Theory and Simulation of Broadband Electrostatic Noise in the Magnetotail [PDF]

open access: yesJournal of Astronomy and Space Sciences, 1994
Various plasma instabilities driven by the ion beams have been proposed in order to explain the broadband electrostatic noise (BEN) in the earth's geomagnetic tail. Ion acoustic, ion-ion two stream, and electron acoustic instabilities have been proposed.
S. Y. Kim
doaj  

Interaction of ultra relativistic fireball beam with plasma

open access: yesNew Journal of Physics, 2020
Ab initio simulations of the propagation in a plasma of a soon to be available relativistic electron–positron beam or fireball beam provide an effective mean for the study of microphysics relevant to astrophysical scenarios.
N Shukla   +4 more
doaj   +1 more source

Parametric study of Alfvénic instabilities driven by runaway electrons during the current quench in DIII-D

open access: yesNuclear Fusion, 2023
To avoid or mitigate runaway electron (RE) beams in ITER, RE-driven instabilities are actively studied as a complimentary technique to massive material injection.
A. Lvovskiy   +10 more
doaj   +1 more source

Instability in N=4 supersymmetric Yang-Mills theory on S3 at finite density

open access: yesNuclear Physics B
Homogeneous and isotropic equilibrium states of strongly coupled N=4 supersymmetric Yang-Mills charged plasma in R3 with equal chemical potentials for the maximal Abelian subgroup of the R-symmetry group become dynamically unstable below some critical ...
Alex Buchel
doaj   +1 more source

On MHD waves, fire-hose and mirror instabilities in anisotropic plasmas [PDF]

open access: yesNonlinear Processes in Geophysics, 2007
Temperature or pressure anisotropies are characteristic of space plasmas, standard magnetohydrodynamic (MHD) model for describing large-scale plasma phenomena however usually assumes isotropic pressure. In this paper we examine the characteristics of MHD
L.-N. Hau, B.-J. Wang
doaj  

Fusion reactor with electrodynamic stabilization

open access: yesAIP Advances, 2020
Magnetic confinement of thermonuclear plasma can be significantly improved by using the reaction of an electrical conductive wall in combination with the AC driving of the plasma current.
Octavian Balaci
doaj   +1 more source

Pressure anisotropy-driven instabilities regulate the jovian magnetodisk

open access: yesNature Communications
Jupiter’s magnetosphere is often presented as a template for fast-rotating magnetospheres. Distinct from Earth-like, solar wind-driven magnetospheres, it contains an extended magnetodisk encircling the planet.
Z.-Y. Liu   +7 more
doaj   +1 more source

Plasma instabilities

open access: yesPlasma Physics and Controlled Fusion
Abstract An introductory tutorial on plasma stability theory is presented, focussing on application of the normal mode method to the linearised form of the magnetohydrodynamic, Vlasov and Maxwell equations. Following an illustration of how this method can be applied to a simple mechanical problem, single-fluid stability theory is ...
openaire   +1 more source

Finite-β turbulence in Wendelstein 7-X enhanced by sub-threshold kinetic ballooning modes

open access: yesNuclear Fusion
Magnetic fluctuations affecting turbulence and transport, which are manifest at finite normalized plasma pressure β , pose a significant challenge to magnetic confinement fusion devices aiming to achieve high performance.
P. Mulholland   +7 more
doaj   +1 more source

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