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| 2. |
- Shukla, Nitin, et al.
(författare)
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A new purely growing instability in a strongly magnetized nonuniform pair plasma
- 2007
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Ingår i: Physics Letters A. - : Elsevier. - 0375-9601 .- 1873-2429. ; 367:1-2, s. 120-122
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that a strongly magnetized nonuniform electron–positron (hereafter referred to as e–p or pair) plasma is unstable against low-frequency (in comparison with the electron gyrofrequency) electrostatic oscillations. For this purpose, a dispersion relation is derived by using the Poisson equation as well as the electron and positron continuity equations with the guiding center drifts for the electron and positron fluids. The dispersion relation admits a purely growing instability in the presence of the equilibrium density and magnetic field inhomogeneities. Physically, instability arises because of the inhomogeneous magnetic field induced differential electron and positron density fluctuations, which do not keep in phase with the electrostatic potential arising from the charge separation in our nonuniform pair plasmas.
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| 3. |
- Shukla, Nitin, et al.
(författare)
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Ion streaming instability in a quantum dusty magnetoplasma
- 2008
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Ingår i: Physics of Plasmas. - : AIP Publishing. - 1070-664X .- 1089-7674. ; 15:1070-664X, s. 044503-1-044503-3
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that a relative drift between the ions and the charged dust particles in a magnetized quantum dusty plasma can produce an oscillatory instability in a quantum dust acousticlike wave. The threshold and growth rate of the instability are presented. The result may explain the origin of low-frequency electrostatic fluctuations in semiconductors quantum wells. (C) 2008 American Institute of Physics.
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| 4. |
- Shukla, Nitin, et al.
(författare)
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Magnetization of a quantum plasma by photons
- 2010
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Ingår i: PHYSICS LETTERS A. - : Elsevier Science B.V., Amsterdam.. - 0375-9601 .- 1873-2429. ; 374:15-16, s. 1749-1750
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that the ponderomotive force of large-amplitude electromagnetic waves (photons), which includes the electron spin current and exchange potential contributions in a quantum plasma, can generate magnetic fields. The present result can account for the magnetic fields in dense compact astrophysical objects and in the next generation laser-solid density plasma interaction experiments.
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| 5. |
- Shukla, Nitin, et al.
(författare)
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Magnetization of a warm plasma by the nonstationary ponderomotive force of an electromagnetic wave
- 2009
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Ingår i: PHYSICAL REVIEW E. - : American Physical Society. - 1539-3755. ; 80, s. 027401-
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that magnetic fields can be generated in a warm plasma by the nonstationary ponderomotive force of a large-amplitude electromagnetic wave. In the present Brief Report, we derive simple and explicit results that can be useful for understanding the origin of the magnetic fields that are produced in intense laser-plasma interaction experiments.
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| 6. |
- Shukla, Nitin, et al.
(författare)
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Nonlinear electromagnetic wave equations for superdense magnetized plasmas
- 2009
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Ingår i: PHYSICS OF PLASMAS. - : AIP Publishing. - 1070-664X .- 1089-7674. ; 16:7
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Tidskriftsartikel (refereegranskat)abstract
- By using the quantum hydrodynamic and Maxwell equations, we derive the generalized nonlinear electron magnetohydrodynamic, the generalized nonlinear Hall-MHD (HMHD), and the generalized nonlinear dust HMHD equations in a self-gravitating dense magnetoplasma. Our nonlinear equations include the self-gravitating, the electromagnetic, the quantum statistical electron pressure, as well as the quantum electron tunneling and electron spin forces. They are useful for investigating a number of wave phenomena including linear and nonlinear electromagnetic waves, as well as three-dimensional electromagnetic wave turbulence spectra and structures arising from mode coupling processes at nanoscales in dense quantum magnetoplasmas.
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| 7. |
- Shukla, Nitin, et al.
(författare)
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Nonlinear generation of zonal flows by ion-acoustic waves in a uniform magnetoplasma
- 2010
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Ingår i: Physics Letters A. - : Elsevier. - 0375-9601 .- 1873-2429. ; 374:4, s. 592-594
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Tidskriftsartikel (refereegranskat)abstract
- It is shown that large-scale zonal flows (ZFs) can be excited by Reynolds stress of nonlinearly interacting random phase ion-acoustic waves (EIAWs) in a uniform magnetoplasma. Since ZFs are associated with poloidal sheared flows, they can tear apart short scale EIAW turbulence eddies, and hence contribute to the reduction of the cross-field turbulent transport in a magnetized plasma. (C) 2009 Elsevier B.V. All rights reserved.
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| 8. |
- Shukla, Nitin, et al.
(författare)
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The dust acoustic wave in a bounded dusty plasma with strong electrostatic interactions between dust grains
- 2011
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Ingår i: Physics Letters A. - : Elsevier BV. - 0375-9601 .- 1873-2429. ; 375:17, s. 1809-1811
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Tidskriftsartikel (refereegranskat)abstract
- The dispersion relation for the dust acoustic wave (DAW) in an unmagnetized dusty plasma cylindrical waveguide is derived, accounting for strong electrostatic interactions between charged dust grains. It is found that the boundary effect limits the radial extent of the DAW. The present result should be helpful for understanding the frequency spectrum of the DAW in a dusty plasma waveguide with strongly coupled charged dust grains.
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