Characteristics of Magnetized Dusty Plasma Sheath With Two Ion Species and q-Nonextensive Electrons

The effect of q -nonextensive electrons, nature, and magnitude of dust charge on magnetized dusty plasma sheath with two ion species has been numerically investigated via fluid model. The initial common speed of ion species at the sheath entrance has been extended, which increases from subsonic to...

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Veröffentlicht in:IEEE transactions on plasma science 2021-04, Vol.49 (4), p.1268-1277
Hauptverfasser: Basnet, Suresh, Pokhrel, Rishi Ram, Khanal, Raju
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Pokhrel, Rishi Ram
Khanal, Raju
description The effect of q -nonextensive electrons, nature, and magnitude of dust charge on magnetized dusty plasma sheath with two ion species has been numerically investigated via fluid model. The initial common speed of ion species at the sheath entrance has been extended, which increases from subsonic to supersonic with the decrease in nonextensive parameter q and ion-neutral drag force as well. The presence of super extensive primary electrons ( q < 1 ) has significantly affected the sheath parameters characterizing the dusty plasma sheath: dust charging, potential profile, ion and electron densities profile, ion velocity profile, and dust dynamics. It is found that the negatively charged dust grains accelerate in the region of weak electric field, whereas the fluctuation decreases in the region of strong electric field. A significant change has been observed in dust dynamics with the presence of two different natures of dust charges and its magnitudes. The velocity fluctuations of negatively and positively charged grains are in opposite phase. Furthermore, the comparative study of dust velocity in the presence and absence of dust-neutral collisions has been presented.
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The initial common speed of ion species at the sheath entrance has been extended, which increases from subsonic to supersonic with the decrease in nonextensive parameter <inline-formula> <tex-math notation="LaTeX">q </tex-math></inline-formula> and ion-neutral drag force as well. The presence of super extensive primary electrons (<inline-formula> <tex-math notation="LaTeX">q < 1 </tex-math></inline-formula>) has significantly affected the sheath parameters characterizing the dusty plasma sheath: dust charging, potential profile, ion and electron densities profile, ion velocity profile, and dust dynamics. It is found that the negatively charged dust grains accelerate in the region of weak electric field, whereas the fluctuation decreases in the region of strong electric field. A significant change has been observed in dust dynamics with the presence of two different natures of dust charges and its magnitudes. The velocity fluctuations of negatively and positively charged grains are in opposite phase. 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The initial common speed of ion species at the sheath entrance has been extended, which increases from subsonic to supersonic with the decrease in nonextensive parameter <inline-formula> <tex-math notation="LaTeX">q </tex-math></inline-formula> and ion-neutral drag force as well. The presence of super extensive primary electrons (<inline-formula> <tex-math notation="LaTeX">q < 1 </tex-math></inline-formula>) has significantly affected the sheath parameters characterizing the dusty plasma sheath: dust charging, potential profile, ion and electron densities profile, ion velocity profile, and dust dynamics. It is found that the negatively charged dust grains accelerate in the region of weak electric field, whereas the fluctuation decreases in the region of strong electric field. A significant change has been observed in dust dynamics with the presence of two different natures of dust charges and its magnitudes. The velocity fluctuations of negatively and positively charged grains are in opposite phase. Furthermore, the comparative study of dust velocity in the presence and absence of dust-neutral collisions has been presented.]]></abstract><cop>New York</cop><pub>IEEE</pub><doi>10.1109/TPS.2021.3066888</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0003-4721-6362</orcidid><orcidid>https://orcid.org/0000-0001-8450-4692</orcidid></addata></record>
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source IEEE Xplore
subjects Collisions
Comparative studies
Drag
Dust
dust grains
Dusty plasmas
dusty sheath
Electric fields
Electrons
Entropy
fluid model
Ion velocity
Ions
Mathematical model
non-Maxwellian electrons
Parameters
Plasma sheaths
Plasmas
Thermodynamics
Velocity distribution
title Characteristics of Magnetized Dusty Plasma Sheath With Two Ion Species and q-Nonextensive Electrons
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