Article
Physics, Multidisciplinary
Vladimir S. Sukhomlinov, Alexander S. Mustafaev, Hend Koubaji, Nikolay A. Timofeev, Oscar Murillo
Summary: This study investigates the stability of a system consisting of a fast electron beam and a dense plasma with an anisotropic electron velocity distribution function. It was found that plasma anisotropy has a significant effect on both stability loss conditions and growth rate, with physical interpretations proposed for observed effects.
NEW JOURNAL OF PHYSICS
(2021)
Article
Multidisciplinary Sciences
Muni Zhou, Zhuo Liu, Nuno F. Loureiro
Summary: We conducted analytical and numerical investigations on subion-scale turbulence in low-beta plasmas using a rigorous reduced kinetic model. The results show that electron heating is primarily caused by Landau damping of kinetic Alfven waves rather than Ohmic dissipation. This collisionless damping is facilitated by the weakening of advective nonlinearities near intermittent current sheets, where free energy concentrates. The linearly damped energy of electromagnetic fluctuations explains the steepening of their energy spectrum compared to a fluid model.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Physics, Multidisciplinary
Shubhra Bhowmick, Biswajit Sahu
Summary: This study systematically investigates the propagation of both linear and nonlinear dust acoustic waves in a collisional magnetized warm dusty plasma. The analysis reveals that the linear damping is caused by dust-neutral collisions and the nonlinear excitations are significantly influenced by various plasma parameters.
CHINESE JOURNAL OF PHYSICS
(2022)
Article
Astronomy & Astrophysics
K. C. Barik, S. Singh, G. S. Lakhina
Summary: A theoretical model discusses the resonant instability of kinetic Alfven waves (KAWs) driven by ion beam and how non-Maxwellian kappa-electrons impede the growth of KAWs. The model also examines the effects of other plasma parameters on wave excitation and can generate waves with frequencies relevant to auroral ionospheric altitudes. Predictions from the model are applicable to planetary environments with ion beams and non-Maxwellian kappa-electrons.
ASTROPHYSICAL JOURNAL
(2021)
Article
Nanoscience & Nanotechnology
Chen Xia, Hui Chen, Xiao Chang Chen, San Qiu Liu
Summary: The properties of dust inertial Alfven waves (DIAWs) in a dusty plasma with the effects of polarization force are investigated. First, the dispersion equation is obtained from the fluid equations by considering the polarization force. Then, the energy balance equation is deduced by applying the Sagdeev pseudopotential method. It is shown that the polarization force affects the characteristics of DIAWs as well as the pseudopotential significantly. In addition, the existence of the polarization force changes the width of DIAWs. The present results may be helpful in further understanding the effect of polarization forces on the formation of linear and nonlinear structures of Alfven waves in the laboratory plasma, astrophysical dusty plasma systems, planetary ring systems, cometary tails, etc.
Article
Physics, Fluids & Plasmas
Feiyu Li, Xiangrong Fu, Seth Dorfman
Summary: This study takes an important step towards direct hybrid simulation of the Alfven wave parametric decay instability (PDI) in a laboratory plasma. The threshold behaviors of Alfven wave amplitude and frequency required for triggering the instability are identified with the help of simulations and supported by simple theoretical analysis.
PHYSICS OF PLASMAS
(2022)
Article
Engineering, Aerospace
Punam Kumari Prasad, Asit Saha
Summary: This study explores bifurcation analysis of ion-acoustic wave solutions of the nonlinear Schrodinger equation in an electron-ion magnetized solar wind plasma, revealing the existence of various ion-acoustic wave solutions, with only periodic waves growing in amplitude as they move away from the Sun.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Geosciences, Multidisciplinary
Run Shi, Jun Liang, Binbin Ni
Summary: The study found that with decreasing perpendicular wavelength and increasing hot electron temperature, the coupling of kinetic Alfven waves to electron acoustic waves becomes more important; electron acoustic waves exhibit strong Landau damping outside the transition region, with nonlinear dissipation becoming significant inside the transition region.
GEOPHYSICAL RESEARCH LETTERS
(2021)
Article
Mechanics
Salemah A. Almutlak, Shahida Parveen, Shahzad Mahmood, Anisa Qamar, B. M. Alotaibi, S. A. El-Tantawy
Summary: This study investigates the overtaking collision phenomenon of slow shear Alfven solitons in a low beta, collisionless, magnetized plasma. By using the Korteweg-de Vries equation and bifurcation theory, the stability and nonlinear periodic solutions of slow shear Alfven waves are studied. The influence of plasma parameters on soliton amplitude and width is examined analytically and numerically, and the profiles of overtaking interaction of different solitons are determined. This study is crucial for understanding nonlinear slow shear Alfven wave structures in both space and laboratory plasmas.
Article
Physics, Multidisciplinary
Shahida Parveen, Shahzad Mahmood, Anisa Qamar, Haifa Alyousef, Abdul-Majid Wazwaz, S. A. El-Tantawy
Summary: This paper analyzes the collisions between two types of dust kinetic Alfven solitons and studies their properties through deriving equations and using techniques. The study shows that for small amplitudes, the amplitude at the colliding point is nearly equal to the sum of individual amplitudes, and the impact of relevant physical parameters on the phase shifts is examined.
ROMANIAN REPORTS IN PHYSICS
(2022)
Article
Astronomy & Astrophysics
Yangyang Shen, Anton V. Artemyev, Xiao-Jia Zhang, Ying Zou, Vassilis Angelopoulos, Ivan Vasko, Andrei Runov, Ethan Tsai, Colin Wilkins
Summary: Energetic electron precipitation from the magnetosphere to the ionosphere during substorms is important for magnetosphere-ionosphere coupling. Through observations and analysis, it was found that wave-particle interactions are likely responsible for the precipitation of energetic electrons from the plasma sheet. Kinetic Alfven waves were found to dominate over whistler-mode waves in scattering and precipitating energetic plasma sheet electrons during the substorm injection.
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
(2023)
Article
Physics, Fluids & Plasmas
Lei Ye, Yang Chen, Guoyong Fu
Summary: A strong nonlinear saturation mechanism of the RSAE induced by thermal electrons is observed in gyrokinetic delta f particle-in-cell simulation. This nonlinear effect occurs at moderate mode amplitude, delta B-perpendicular to/B < 10(-3), and is associated with the electron parallel streaming along the perturbed magnetic field lines. The nonlinear components modify the RSAE mode structure and suppress energetic particle drive significantly.
Article
Nanoscience & Nanotechnology
T. I. Rajib, S. Sultana
Summary: The reductive perturbation approach was used to study the nonlinear propagation of fast and slow EPMA modes in an EP plasma medium. It was found that the fast mode propagates as a compressive solitary wave, while the slow mode propagates as a rarefactive solitary wave. The significance of this study lies in understanding the nonlinear electromagnetic wave phenomena in laboratory plasma and space environments.
Review
Physics, Multidisciplinary
J. K. Deka, P. N. Deka
Summary: This study investigates the generation of unstable whistler mode in a burning plasma in the presence of kinetic Alfven wave turbulence. It is found that the propagation of low frequency KAW in inhomogeneous magnetized plasma may play a significant role in heating energetic particles and energy exchange among waves, leading to instability in fusion reactors.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Physics, Multidisciplinary
A. R. Niknam, M. S. Sayyed Hasani, E. Rastbood, Sh. Abbasi Rostami, S. M. Khorashadizadeh
Summary: In this paper, the Jeans gravitational instability in a dusty plasma with q-nonextensive velocity distributions is investigated using a hydrodynamic model. The effects of dust-ion collision, polarization force, and nonextensivity parameters on the instability criterion and growth rate are analyzed. The results show that increasing nonextensivity and polarization parameters enhance the threshold condition and growth rate of the instability. Additionally, dust-ion collisions have a stabilizing influence on the growth rate and drive the system towards thermal equilibrium. These findings are important for understanding astrophysical phenomena and laboratory dusty plasmas.
INDIAN JOURNAL OF PHYSICS
(2023)
