Subsonic Potentials in Ultradense Plasmas

AbstractThe existence of the subsonic dynamic potential for a test charge in extremely dense quantum plasmas is pointed out for the first time. The dispersion equation of ion acoustic wave in relativistic plasmas is derived by using the quantum hydrodynamic model. The relativistic electrons obey Fermi statistics, whereas the ions are taken classically. The standard model of wake potential is hereafter applied for the derivation of dynamic potential of the test particle. A usual supersonic potential is found suppressed. However, the oscillatory subsonic wake potential does exist in small length scales. The analytical results are applied in different regions by taking the range of magnetic field as well as the electron number density. It is found that the dynamic potential exists only when vt < Cs, showing the presence of subsonic wake potential contrary to the usual supersonic condition vt > Cs. Here vt is the test particle speed and Cs is the acoustic speed defined by the Fermi temperature of the electrons. This work is significant in order to describe the structure formation in the astrophysical environment and laboratory dense plasmas.

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Test particle simulation of relativistic electrons interacting with EMIC triggered emissions in the radiation belts

2014 XXXIth URSI General Assembly and Scientific Symposium (URSI GASS) ◽

10.1109/ursigass.2014.6929887 ◽

2014 ◽

Author(s):

Yuko Kubota ◽

Yoshiharu Omura

Keyword(s):

Test Particle ◽

Radiation Belts ◽

Particle Simulation ◽

Relativistic Electrons

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Modified Dust-Lower-Hybrid Waves in Quantum Plasma

Scientific Inquiry and Review ◽

10.32350/22/020202 ◽

2018 ◽

Vol 2 (2) ◽

pp. 11-21

Author(s):

Abdul Rauf ◽

I. Zeba ◽

Muhammad Saqlain

Keyword(s):

Dusty Plasma ◽

Graphical Analysis ◽

Quantum Plasma ◽

Lower Hybrid ◽

Hybrid Wave ◽

Lower Hybrid Wave ◽

Quantum Hydrodynamic Model ◽

Fermi Temperature ◽

Hybrid Waves ◽

Lower Hybrid Waves

Dust-lower-hybrid waves in quantum plasma have been studied. The dispersion relation of the dust-lower-hybrid wave has been examined using the quantum hydrodynamic model of plasma in an ultra-cold Fermi dusty plasma in the presence of a uniform external magnetic field. Graphical analysis shows that the electron Fermi temperature effect and the quantum corrections give rise to significant effects on the dust-lower-hybrid wave of the magnetized quantum dusty plasma.

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Interactions between H+band EMIC waves and radiation belt relativistic electrons: Comparisons of test particle simulations with quasi-linear calculations

Physics of Plasmas ◽

10.1063/1.5054809 ◽

2019 ◽

Vol 26 (3) ◽

pp. 032901 ◽

Cited By ~ 5

Author(s):

Song Fu ◽

Binbin Ni ◽

Xin Tao ◽

Yasong Ge ◽

Jiang Liu ◽

...

Keyword(s):

Test Particle ◽

Radiation Belt ◽

Relativistic Electrons ◽

Particle Simulations ◽

Emic Waves

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Landau Quantised Modification of Rayleigh–Taylor Instability in Dense Plasmas

Zeitschrift für Naturforschung A ◽

10.1515/zna-2019-0301 ◽

2020 ◽

Vol 75 (2) ◽

pp. 113-118 ◽

Cited By ~ 1

Author(s):

M. Shahid ◽

A. Rasheed ◽

Misbah Kanwal ◽

M. Jamil

Keyword(s):

Magnetic Field ◽

Gravitational Instability ◽

Taylor Instability ◽

Dense Plasmas ◽

Exchange Correlation ◽

Quantum Hydrodynamic Model ◽

Exchange Correlation Potential ◽

Correlation Potential ◽

Rayleigh Taylor Instability ◽

Quantum Hydrodynamic

AbstractEffects of Landau quantisation and exchange-correlation potential on Rayleigh–Taylor instability (RTI)/gravitational instability are investigated in inhomogeneous dense plasmas. Quantum hydrodynamic model is used for the electrons, while the ions are assumed to be cold and classical. RTI is modified with the inclusion of Landau quantisation related to plasma density, ambient magnetic field, exchange speed, and modified Fermi speed. Owing to the exchange-correlation effects, gravitational instability increases, whereas the Landau quantisation effects contribute in the opposite way for quantisation factor η < 1. Since the exchange-correlation potential is a function of density, by controlling the number density and magnetic field one can control RTI.

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Test charge potential in the presence of trapped electrons

Journal of Plasma Physics ◽

10.1017/s0022377800010230 ◽

1979 ◽

Vol 22 (3) ◽

pp. 443-451 ◽

Cited By ~ 1

Author(s):

M. Nambu ◽

K. H. Spatschek ◽

H. Akama

Keyword(s):

Test Particle ◽

Turbulent Plasma ◽

Characteristic Parameters ◽

Single Wave ◽

Trapped Particles ◽

Charge Potential ◽

Test Charge ◽

The Many ◽

Trapped Electron ◽

Particle Approach

Using a test particle approach, the potential of a trapped electron is calculated outside the Debye sphere in the electrostatic limit. The potential strongly depends on some characteristic parameters, such as bounce frequencies of the test and background trapped particles, the total number of trapped particles, etc. In some cases, the potential falls off as the inverse of the distance r. The model is limited to the single-wave case; possible generalizations to the many-wave situation in a turbulent plasma are discussed.

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Test Particle Simulations of Interaction Between Monochromatic Chorus Waves and Radiation Belt Relativistic Electrons

Astrophysics and Space Science ◽

10.1007/s10509-014-1859-1 ◽

2014 ◽

Vol 351 (2) ◽

pp. 427-434 ◽

Cited By ~ 3

Author(s):

Zhonglei Gao ◽

Hui Zhu ◽

Lewei Zhang ◽

Qinghua Zhou ◽

Chang Yang ◽

...

Keyword(s):

Test Particle ◽

Radiation Belt ◽

Relativistic Electrons ◽

Chorus Waves ◽

Particle Simulations

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Two stream ion acoustic wave instability in warm dense plasmas

Astrophysics and Space Science ◽

10.1007/s10509-019-3510-7 ◽

2019 ◽

Vol 364 (2) ◽

Cited By ~ 1

Author(s):

M. Mohammadnejad ◽

M. Akbari-Moghanjoughi

Keyword(s):

Acoustic Wave ◽

Wave Instability ◽

Ion Acoustic Wave ◽

Dense Plasmas ◽

Ion Acoustic

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Streaming effects on dust ion acoustic wave in dense quantized plasmas

International Journal of Modern Physics B ◽

10.1142/s0217979221500491 ◽

2021 ◽

Vol 35 (04) ◽

pp. 2150049

Author(s):

Zahid Mir ◽

A. Rasheed ◽

Arroj A. Khan ◽

M. Asif ◽

M. Jamil

Keyword(s):

Dense Plasma ◽

Dusty Plasmas ◽

Linear Dispersion ◽

Ion Acoustic Wave ◽

Exchange Correlation ◽

Quantum Hydrodynamic Model ◽

Exchange Correlation Potential ◽

Ion Acoustic ◽

Correlation Potential ◽

Quantum Hydrodynamic

The propagation of dust-ion acoustic (DIA) wave is studied with the streaming effects of ion particles in a quantum dusty plasmas. The quantum effects arising from Landau magnetization, Fermi degenerate pressure, tunneling potential and exchange-correlation potential are considered for the electrons. Linear dispersion relation is derived using Quantum Hydrodynamic Model and the results are graphically presented showing the propagation and growth rate of the electrostatic mode in the dense plasma environment.

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BRAGINSKII EQUATIONS FOR HOT RELATIVISTIC PLASMAS: MIXED APPROACH

10.46813/2020-130-050 ◽

2020 ◽

pp. 50-54

Author(s):

I. Marushchenko ◽

N.A. Azarenkov

Keyword(s):

Transport Processes ◽

Hot Electrons ◽

Relativistic Electrons ◽

Relativistic Hydrodynamics ◽

Classical Representation ◽

Fusion Plasma ◽

Relativistic Plasmas ◽

Astrophysical Objects ◽

Relativistic Description ◽

Mixed Approach

In the paper, the Braginskii equations for relativistic electrons in hot plasmas with slow macroscopic fluxes are derived. This consideration is suitable for description of the typical fusion plasma with the temperatures of about several tens of kiloelectronvolt, when the plasma rotation and the longitudinal currents should be taken into account. Contrary to other papers devoted to classical description of transport processes in fusion devices, as well as to fully relativistic description of the astrophysical objects, we propose the mixed approach with fully relativistic kinetics for the hot electrons and non-relativistic macroscopic fluxes. The obtained form of the Braginskii equations includes all important features of relativistic hydrodynamics, has the same form as the classical representation, which is currently implemented into modern transport codes, and can easily replace the latter.

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