A5028864126- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Earthquake Detection and Analysis
- Magnetic confinement fusion research
- Geomagnetism and Paleomagnetism Studies
- Astro and Planetary Science
- Transportation Systems and Logistics
- Advanced Energy Technologies and Civil Engineering Innovations
- Oil, Gas, and Environmental Issues
- Structural Integrity and Reliability Analysis
- Offshore Engineering and Technologies
Institute of Solar-Terrestrial Physics
2012-2024
Geophysical Center
2023
The polarization and field‐aligned structure of drift‐compressional modes the corresponding plasma instability are studied in a gyrokinetic framework axisymmetric model magnetosphere with isotropic plasma. is assumed to be composed core cold particles an admixture hot protons, inverted distribution protons. Such experiences compressional resonance when wave frequency equal eigenfrequency mode. In this resonance, dominated by azimuthal magnetic field components narrowly localized along line...
The review offered for the first time in Russian scientific literature is devoted to various aspects of problem impact space weather on ground transport systems. An analysis available information indicates that disturbances can affect rail infrastructure through both direct and indirect effects system components. One main hazards geomagnetically induced currents (GICs) grounded extended structures excited by geomagnetic field disturbances. telluric electric fields associated with them cause...
The paper reviews the current state of problem interaction between long-period ultra-low-frequency (ULF) waves and high-energy particles. We consider elements theory energy exchange particles, particle transport across magnetic shells under influence electromagnetic field a wave, acceleration radiation belt particles by both resonant non-resonant mechanisms. examine mechanisms generation azimuthally-small-scale ULF due to instabilities arising from wave–particle resonance. cases Alfvén,...
As shown within the gyrokinetic framework, drift-compressional waves can propagate in magnetosphere direction of energetic electron drift. The plasma is assumed to be composed cold particles with an admixture hot protons a Maxwell distribution and electrons inverted distribution. conditions existence such their intensification due resonance interaction (drift instability) have been de- termined. results helpful interpreting observation wave phenomena frequencies range geomagnetic pulsations...
Abstract A mechanism for generation of the parallel electric field by Alfvén wave in dipole model magnetosphere full gyrokinetics is proposed. The mode caused coupling and electrostatic modes due to plasma inhomogeneity line curvature presence trapped hot electrons. described an inhomogeneous integral equation arising from averaging bounce motion It was found that localized near ionosphere at heights below 0.5 Earth's radius. For typical amplitudes observed space, potential reaches values...
Magnetohydrodynamic (MHD) waves play a crucial role in the plasma processes of stellar atmospheres and planetary magnetospheres. Wave phenomena both media are known to have similarities unique traits typical each system.
 MHD related magnetospheric solar physics studied largely independently other, despite similarity properties these common physical foundations wave generation propagation. A unified approach studying Sun Earth's magnetosphere opens up prospects for further progress two...
As shown within the limits of gyrokinetics, drift-compression waves can propagate in magnetosphere direction energetic electron drift. Plasma is assumed to be composed cold particles with hot additives such as protons Maxwell distribution and electrons inverse distribution. We have determined conditions existence their intensification due resonance interaction (drift instability). The results helpful for interpretation observation wave phenomena frequencies range geomagnetic pulsations Pc5 below.
This communication describes the study of mirror modes in a plasma with small or large fraction cold electrons within gyrokinetic framework. It was found that if number is me/mi times smaller than hot electrons, dispersion relation compressional perturbation represents modification magnetohydrodynamics slow mode relation; anisotropy small, an oscillation, but sufficient, square oscillation frequency becomes negative and one solutions 'fluid' instability. In opposite case, when larger damping...
Abstract We present the first direct evidence of an in situ excitation drift‐compressional waves driven by drift resonance with ring current protons magnetosphere. Compressional Pc4–5 frequencies 4–12 mHz were observed Arase satellite near magnetic equator at L ∼ 6 evening sector on 19 November 2018. Estimated azimuthal wave numbers ( m ) ranged from −100 to −130. The frequency was consistent that calculated using mode theory, whereas plasma anisotropy too small excite drift‐mirror mode....
When organizing cathodic protection systems for pipelines, it is necessary to be able calculate variations in the “pipe-ground” potential during geomagnetic disturbances. For this purpose, authors have developed a software code calculating pipeline given disturbance of electrotelluric field surface layers Earth. As an example, distortion «soil-pipe» was assessed substorm that took place on October 9, 2018. A database magnetic stations Russian Arctic and global model conductivity Earth’s were...
Magnetohydrodynamic (MHD) waves play a crucial role in the plasma processes of stellar atmospheres and planetary magnetospheres. Wave phenomena both media are known to have similarities unique traits typical each system.
 MHD related magnetospheric solar physics studied largely independently other, despite similarity properties these common physical foundations wave generation propagation. A unified approach studying Sun Earth's magnetosphere opens up prospects for further progress two...
We consider the solutions of two integrodifferential equations in this work. These describe ultra-low frequency waves dipol-like model magnetosphere gyrokinetic framework. The first one is reduced to homogeneous, second kind Fredholm equation. This equation describes structure parallel component magnetic field drift-compression along Earth’s field. inhomogeneous, field-aligned electric potential Alfvén waves. Both integral are solved numerically.
The paper reviews the current state of problem interaction between long-period ultra-low-frequency (ULF) waves and high-energy particles. We consider elements theory energy exchange particles, particle transport across magnetic shells under influence electromagnetic field a wave, acceleration radiation belt particles by both resonant non-resonant mechanisms. examine mechanisms generation azimuthally-small-scale ULF due to instabilities arising from wave–particle resonance. cases Alfvén,...