Total Energy Loss of a Test Charge in a Collisional Magnetoplasma

Shukla, P. K.; Singh, R. N.

doi:10.1088/0031-8949/4/6/008

Cited by 2 publications

(2 citation statements)

References 10 publications

(17 reference statements)

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“…The electrostatic potential [32] due to small and large test charge velocities has been investigated to display the excitation of long-range wakefields in Maxwellian plasmas. Shivamoggi and Mulser [33] examined the effects of magnetic field, collisions, and plasma inhomogeneity on the potential due to slowly and rapidly moving test charges [17,34], and Lakshmi et al [35] discussed the Debye shielding phenomenon in a dusty plasma by considering the Boltzmannian electrons and ions with cold negative dust grains. It was revealed that plasma parameters significantly alter the characteristics of small and large amplitude potentials.…”

Section: Dusty Plasma and Test Charge Techniquementioning

confidence: 99%

Plasma Diagnostic Methods: Test Charge Response in Lorentzian Dusty Plasmas

Ali¹,

Al-Hadeethi²

2020

Selected Topics in Plasma Physics

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Different plasma diagnostic methods are briefly discussed, and the framework of a test charge technique is effectively used as diagnostic tool for investigating interaction potentials in Lorentzian plasma, whose constituents are the superthermal electrons and ions with negatively charged dust grains. Applying the space-time Fourier transformations to the linearized coupled Vlasov-Poisson equations, a test charge potential is derived with a modified response function due to energetic ions and electrons. For a test charge moving much slower than the dust-thermal speed, there appears a short-range Debye-Hückel (DH) potential decaying exponentially with distance and a long-range far-field (FF) potential as the inverse cube of the distance from test charge. The FF potentials exhibit more localized shielding curves for low-Kappas, and smaller effective shielding length is observed in dusty plasma compared to electron-ion plasma. However, a wakefield (WF) potential is formed behind the test charge when it resonates with dust-acoustic oscillations, whereas a fast moving test charge leads to the Coulomb potential having no shielding around. It is revealed that superthermality and plasma parameters significantly alter the DH, FF, and WF potentials in space plasmas of Saturn’s E-ring, where power-law distributions can be used for energetic electrons and ions in contrast to Maxwellian dust grains.

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Section: Dusty Plasma and Test Charge Techniquementioning

confidence: 99%

Plasma Diagnostic Methods: Test Charge Response in Lorentzian Dusty Plasmas

Ali¹,

Al-Hadeethi²

2020

Selected Topics in Plasma Physics

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“…A kinetic description was used to study the electrostatic potential around a test charge with low and high velocities [29,30], revealing the excitation of longrange wakefields in a Maxwellian plasma. The effects of magnetic field, collisions and plasma density gradients have also been studied for slowly and rapidly moving test charges [31][32][33]. The Debye shielding has been studied in a dusty plasma with Boltzmann distributed electrons and ions in the presence of static negatively charged dust grains [34], taking into account both small and finite amplitude potential distributions.…”

Section: Introductionmentioning

confidence: 99%

Slow test charge response in a dusty plasma with Kappa distributed electrons and ions

Ali

Eliasson

2017

Phys. Scr.

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The electrostatic potential around a slowly moving test charge is studied in a dusty plasma where the ions and electrons follow a powerlaw Kappa distribution in velocity space. A test charge moving with a speed much smaller than the dust thermal speed gives rise to a short-scale Debye–Hückel potential as well as a long-range far-field potential decreasing as inverse cube of the distance to the test charge along the propagation direction. The potentials are significantly modified in the presence of high-energy tails, modeled by lower spectral indices in the ion and electron Kappa distribution functions. Plasma parameters relevant to laboratory dusty plasmas are discussed.

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Total Energy Loss of a Test Charge in a Collisional Magnetoplasma

Abstract: Total energy loss of a test charge in a collisional magnetoplasma.

Cited by 2 publications

References 10 publications

Plasma Diagnostic Methods: Test Charge Response in Lorentzian Dusty Plasmas

Plasma Diagnostic Methods: Test Charge Response in Lorentzian Dusty Plasmas

Slow test charge response in a dusty plasma with Kappa distributed electrons and ions

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