Article
Physics, Fluids & Plasmas
Bahaa F. Mohamed, Rehab A. Albrulosy
Summary: This study examines the excitation of electrostatic high frequency surface waves (SWs) in semi bounded magnetized plasma using a quantum hydrodynamic (QHD) model. Various quantum effects including recoil effect, Fermi degenerate pressure and exchange-correlation potential are considered. A general analytical expression for the dispersion relation is derived using the linearized QHD model and Poisson's equation in the presence of a static magnetic field. The study finds that exchange and correlation effects decrease the other quantum effects and shift the wave frequency to lower frequencies. It also shows that the group velocities of small wavelength modes are very large with higher quantum effects, while for long wavelength modes they are higher with small quantum effects. The wide range of applications in various fields makes SW investigation an important area of quantum research.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2023)
Article
Physics, Fluids & Plasmas
H. H. Pajouh, M. Shahmasouri, M. -J. Lee, Y. -D. Jung
Summary: The basic features of surface dual modes on the plasma slab and their damping rates are investigated in this study. The functional perturbation method is used to evaluate the integral of kinetic wave dispersion relation and derive the wave frequency as well as the relevant Landau damping decrement of the electrostatic surface modes. The influence of ion temperature and geometrical effects on the damping rate of surface dual modes is examined. It is found that the damping rate increases with ion temperature and the propagation of surface waves in plasma slab is more difficult compared to semi-infinite plasma due to the interaction with additional boundary conditions.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2022)
Article
Chemistry, Physical
M. Umair, A. Ghaffar, Majeed A. S. Alkanhal, Y. Khan, Ali. H. Alqahtani, I. Shakir
Summary: In this manuscript, the plasmonic modes of a metallic slab in an anisotropic plasma environment are investigated. The influence of the tensorial permittivity of the plasma medium on the behavior of the plasmonic modes is analyzed. The numerical results demonstrate that by adjusting the plasma parameters and the separation distance between the plates, the effective mode index, attenuation, and phase velocity of the lower and higher modes can be tuned in a certain electromagnetic wave frequency range. Furthermore, it is observed that the attenuation of higher plasmonic modes is more prominent compared to lower modes for both plasma frequency and separation distance. The field distribution of the anisotropic plasma medium is also analyzed to confirm the conditions of the electromagnetic surface wave. The conclusion is that the anisotropy of the plasma dielectric provides an additional degree of freedom to control the characteristics of plasmonic modes, and this control over the anisotropic properties of the plasma medium can lead to increased efficiency of nano-plasmonic structures.
Article
Astronomy & Astrophysics
Xianshu Wu, Chao Shen, Jingchun Li, Jiaqi Dong, Kehua Li
Summary: In this study, test particle simulations were used to verify the nonlinear heating of low-frequency Alfven waves on ions and analyze the underlying process. The results show that low-frequency Alfven waves can periodically pick up ions, leading to oscillations of average parallel velocity and temperature of the plasma by phase mixing, ultimately resulting in the stabilization of acceleration. Furthermore, an analysis was developed to estimate the time required for heating and accelerating. The presence of more chaotic modes does not necessarily result in better wave heating, and the effect of random phases on the heating process was also discussed.
ASTROPHYSICAL JOURNAL
(2023)
Article
Materials Science, Multidisciplinary
N. Nargesi, S. Miraboutalebi, L. Rajaei, K. Samavati
Summary: This study investigates the phenomena related to high energy regime in a plasma medium using relativistic quantum hydrodynamics at the classical level. Nonlinear equations are obtained due to the relativistic effects even in the weak regime, leading to interesting and novel dynamics of the medium. The focus is on the effects of the exchange interaction between electrons on the dynamics of a warm plasma environment, influenced by the spin polarization ratio. Analytical and numerical solutions, namely stable and bounded soliton waves, are presented, obtained through extended tanh and eigenvalue problem solving techniques respectively. The behavior of the vector potential and density with respect to spin polarization and thermal effects in terms of wave speed is discussed.
RESULTS IN PHYSICS
(2023)
Article
Engineering, Chemical
Qiankun Zheng, Yaqiong Xie, Jinkun Tan, Zhi Xu, Ping Luo, Tianlei Wang, Zhengkun Liu, Feng Liu, Kui Zhang, Zhi Fang, Guangru Zhang, Wanqin Jin
Summary: By coupling ceramic oxygen permeable membranes with dielectric barrier discharge plasma, a new design achieves highly efficient oxygen permeation at low temperatures, significantly reducing the apparent activation energy and increasing oxygen flux by nearly 30 times. This innovation allows for further improvement in performance at lower operating temperatures and integration with other technologies like solid oxide fuel cells and catalytic membrane reactors.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Astronomy & Astrophysics
Noemi Kinga Zsamberger, Robert Erdelyi
Summary: This paper introduces a method that combines solar magneto-seismology and space seismology to diagnose the parameters of the solar atmospheric plasma. By studying a magnetic slab model in an asymmetric magnetic environment, the amplitude ratio technique and the minimum perturbation shift technique are proposed to estimate the internal Alfven speed of the solar plasma.
ASTROPHYSICAL JOURNAL
(2022)
Article
Astronomy & Astrophysics
Noemi Kinga Zsamberger, Yihui Tong, Balazs Asztalos, Robert Erdelyi
Summary: This study investigates the guiding of magnetoacoustic waves in an asymmetric magnetic environment, analyzing the influence of flow on the phase speeds of guided waves and determining the critical flow speed for the onset of instability. The validity of the approximations is verified through initial numerical results.
ASTROPHYSICAL JOURNAL
(2022)
Article
Geosciences, Multidisciplinary
Xiaohui Xie, Xiaohui Liu, Zhiwu Chen, Yan Wang, Dake Chen, Wei Li, Dongsheng Zhang
Summary: Mooring data collected at a flat-topped seamount suggest the generation of pure inertial waves (PIWs) by low-frequency flows over large-scale topography. Energetic PIWs were observed near the seafloor at the edge of the summit. These waves could be associated with low-frequency flows. A nonhydrostatic model was used to show that the observed PIWs are most likely internal wave beams generated by low-frequency flows over the seamount. Two types of PIWs were identified: one that travels horizontally and one that propagates upward with a Doppler-shifted frequency.
GEOPHYSICAL RESEARCH LETTERS
(2023)
Article
Astronomy & Astrophysics
Noemi Kinga Zsamberger, Carmen M. Sanchez Montoya, Robert Erdelyi
Summary: Building on recent studies of the Kelvin-Helmholtz instability, this research investigates the influence of bulk flows on the propagation of MHD waves. Analytical and numerical analyses reveal that flow field asymmetry significantly affects the cutoff frequencies and stability of trapped MHD waves in slab configurations.
ASTROPHYSICAL JOURNAL
(2022)
Article
Physics, Multidisciplinary
Nabi Gul, Rashid Ahmad
Summary: The SSE-QHD model is utilized to investigate Ion-Acoustic Waves in a magnetized quantum plasma with different spin populations in electrons and Coulomb type exchange interactions. An interplay between exchange interactions and density polarization ratio is observed to affect dispersion properties, screening length, and ion-acoustic speed. The model provides insights into the properties of dilute magnetic semiconductors and degenerate Fermi electron gases by considering the significant effects of exchange interactions.
Article
Multidisciplinary Sciences
J. Flores-Farias, R. A. Gallardo, F. Brevis, Alejandro Roldan-Molina, D. Cortes-Ortuno, P. Landeros
Summary: The magnonic band structure of two-dimensional chiral magnonic crystals is investigated, revealing nonreciprocal spin waves and chiral magnetic order induced by an anti-symmetric exchange coupling. The dynamic magnetic behavior and spin-wave propagation features are studied using the Landau-Lifshitz equation and the plane-wave method. This study demonstrates the presence of omnidirectional flat magnonic bands and has implications for spin-wave-based logic devices.
SCIENTIFIC REPORTS
(2022)
Article
Physics, Multidisciplinary
Xiaojie Zhang, Jianhong Rong, Huan Wang, Yuting Wang
Summary: This study investigates the spin wave resonance (SWR) frequency in ferromagnetic thin film with the biquadratic exchange interaction, interlayer exchange coupling, film thickness, surface anisotropy field, and the external magnetic field. The results show that the SWR frequency behaviors of the mid-higher modes are highly sensitive to the biquadratic exchange interaction. The SWR frequencies are linearly proportional to the external magnetic field, but nonlinearly depend on the interlayer exchange coupling and surface anisotropy field. The biquadratic exchange interaction improves the effects of surface anisotropy field, interlayer exchange coupling, and external magnetic field on SWR frequency. An increase in film thickness leads to a decrease in the SWR frequency of the corresponding mid-lower modes, but the frequency gap between the energetically highest mode and lowest mode remains almost the same.
Article
Engineering, Aerospace
Stefaan Van Wal, Simon Tardivel
Summary: This study focuses on bouncing motion in idealized conditions on a two-dimensional plane, simulating the motion of a bouncing square under different impact conditions using the Stronge model. It is found that a single macroscopic bounce often consists of multiple micro-impacts, and the relationship between micro-impacts and restitution coefficients is analyzed.
ADVANCES IN SPACE RESEARCH
(2021)
Article
Multidisciplinary Sciences
Robert Stockill, Moritz Forsch, Frederick Hijazi, Gregoire Beaudoin, Konstantinos Pantzas, Isabelle Sagnes, Remy Braive, Simon Groblacher
Summary: In this study, the authors demonstrate bi-directional on-chip conversion between microwave and optical frequencies using a gallium phosphide optomechanical resonator. The remarkable properties of the material and the appropriate optical pump enable efficient photon conversion, establishing gallium phosphide as a versatile platform for ultra-low-noise conversion of photons between microwave and optical frequencies.
NATURE COMMUNICATIONS
(2022)
Article
Physics, Fluids & Plasmas
H. Alinejad, M. Mahdavi, M. Shahmansouri
JOURNAL OF PLASMA PHYSICS
(2016)
Article
Physics, Multidisciplinary
M. Shahmansouri, A. A. Mamun
EUROPEAN PHYSICAL JOURNAL PLUS
(2016)
Article
Physics, Fluids & Plasmas
M. Shahmansouri, A. Bemooni, A. A. Mamun
JOURNAL OF PLASMA PHYSICS
(2017)
Article
Physics, Fluids & Plasmas
M. Shahmansouri, M. Mahmodi Moghadam
PHYSICS OF PLASMAS
(2017)
Article
Physics, Fluids & Plasmas
M. Mahmodi Moghadam, M. Shahmansouri, B. Farokhi
PHYSICS OF PLASMAS
(2017)
Article
Physics, Multidisciplinary
M. Shahmansouri, R. Aboltaman, A. P. Misra
Article
Physics, Fluids & Plasmas
M. Shahmansouri, A. P. Misra
PLASMA SCIENCE & TECHNOLOGY
(2018)
Article
Physics, Fluids & Plasmas
H. Alinejad, M. Shahmansouri
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2019)
Article
Physics, Multidisciplinary
Mehran Shahmansouri, Myoung-Jae Lee, Neda Khoddam, Young-Dae Jung
Article
Physics, Fluids & Plasmas
Mehran Shahmansouri
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2019)
Article
Physics, Fluids & Plasmas
H. H. Pajouh, M. Shahmasouri, M. -J. Lee, Y. -D. Jung
Summary: The basic features of surface dual modes on the plasma slab and their damping rates are investigated in this study. The functional perturbation method is used to evaluate the integral of kinetic wave dispersion relation and derive the wave frequency as well as the relevant Landau damping decrement of the electrostatic surface modes. The influence of ion temperature and geometrical effects on the damping rate of surface dual modes is examined. It is found that the damping rate increases with ion temperature and the propagation of surface waves in plasma slab is more difficult compared to semi-infinite plasma due to the interaction with additional boundary conditions.
IEEE TRANSACTIONS ON PLASMA SCIENCE
(2022)
Proceedings Paper
Physics, Applied
N. Khodabakhshi, M. Shahmansouri, B. Farokhi
DIVERSE WORLD OF DUSTY PLASMAS
(2018)
Article
Physics, Multidisciplinary
M. Shahmansouri, B. Farokhi, N. Khodabakhshi
COMMUNICATIONS IN THEORETICAL PHYSICS
(2017)
Article
Physics, Applied
Mehran Shahmansouri, Mouloud Tribeche
JOURNAL OF THEORETICAL AND APPLIED PHYSICS
(2016)
