scholarly journals Generation of magnetic fields by the ponderomotive force of electromagnetic waves in dense plasmas

2009 ◽  
Vol 76 (1) ◽  
pp. 25-28 ◽  
Author(s):  
P. K. SHUKLA ◽  
NITIN SHUKLA ◽  
L. STENFLO
Keyword(s):  
Electromagnetic Wave ◽  
Magnetic Fields ◽  
Electromagnetic Waves ◽  
Ponderomotive Force ◽  
Intense Laser ◽  
Quantum Plasma ◽  
Dense Plasmas ◽  
Solid Density ◽  
Astrophysical Objects ◽  
Density Plasma

AbstractWe show that the non-stationary ponderomotive force of a large-amplitude electromagnetic wave in a very dense quantum plasma with streaming degenerate electrons can spontaneously create d.c. magnetic fields. The present result can account for the seed magnetic fields in compact astrophysical objects and in the next-generation intense laser–solid density plasma interaction experiments.

scholarly journals Excitation of ion wakefields by electromagnetic pulses in dense plasmas

2009 ◽  
Vol 75 (1) ◽  
pp. 15-18 ◽  
Author(s):  
P. K. SHUKLA
Keyword(s):  
Wave Equation ◽  
Electromagnetic Wave ◽  
Electromagnetic Waves ◽  
Electromagnetic Pulse ◽  
Dense Plasma ◽  
Ponderomotive Force ◽  
Electromagnetic Pulses ◽  
Dense Plasmas ◽  
High Energies

AbstractThe excitation of electrostatic ion wakefields by electromagnetic pulses in a very dense plasma is considered. For this purpose, a wave equation for the ion wakefield in the presence of the ponderomotive force of the electromagnetic waves is obtained. Choosing a typical profile for the electromagnetic pulse, the form of the ion wakefields is deduced. The electromagnetic wave-generated ion wakefields can trap protons and accelerate them to high energies in dense plasmas.

scholarly journals Weibel instabilities in dense quantum plasmas

2008 ◽  
Vol 74 (4) ◽  
pp. 431-436 ◽  
Author(s):  
LEVAN N. TSINTSADZE ◽  
P. K. SHUKLA
Keyword(s):  
Quantum Effect ◽  
Intense Laser ◽  
Landau Damping ◽  
Kinetic Regime ◽  
Weibel Instability ◽  
Solid Density ◽  
Quantum Plasmas ◽  
Astrophysical Objects ◽  
Unmagnetized Plasma ◽  
Density Plasma

AbstractThe quantum effect on the Weibel instability in an unmagnetized plasma is presented. Our analysis shows that the quantum effect tends to stabilize the Weibel instability in the hydrodynamic regime, whereas it produces a new oscillatory instability in the kinetic regime. A novel effect called the quantum damping, which is associated with the Landau damping, is disclosed. The new quantum Weibel instability may be responsible for the generation of non-stationary magnetic fields in compact astrophysical objects as well as in the forthcoming intense laser–solid density plasma interaction experiments.

scholarly journals Magnetization of Rydberg plasmas by electromagnetic waves

2009 ◽  
Vol 76 (1) ◽  
pp. 19-23 ◽  
Author(s):  
J. T. MENDONÇA ◽  
NITIN SHUKLA ◽  
P. K. SHUKLA
Keyword(s):  
Electromagnetic Wave ◽  
Magnetic Fields ◽  
High Frequency ◽  
Large Amplitude ◽  
Electromagnetic Waves ◽  
Ponderomotive Force

AbstractIt is shown that the ponderomotive force of a large-amplitude electromagnetic wave in Rydberg plasmas can generate quasi-stationary magnetic fields. The present result can account for the origin of seed magnetic fields in the ultracold Rydberg plasmas when they are irradiated by the high-frequency electromagnetic wave.

scholarly journals Dispersion properties of electrostatic oscillations in quantum plasmas

2009 ◽  
Vol 76 (1) ◽  
pp. 7-17 ◽  
Author(s):  
BENGT ELIASSON ◽  
PADMA KANT SHUKLA
Keyword(s):  
Low Frequency ◽  
Electron Plasma ◽  
Quantum Plasma ◽  
Plasma Oscillations ◽  
Heisenberg Uncertainty Principle ◽  
Electrostatic Wave ◽  
Dense Plasmas ◽  
Astrophysical Objects ◽  
Heisenberg Uncertainty ◽  
Semiconductor Plasmas

AbstractWe present a derivation of the dispersion relation for electrostatic oscillations in a zero-temperature quantum plasma, in which degenerate electrons are governed by the Wigner equation, while non-degenerate ions follow the classical fluid equations. The Poisson equation determines the electrostatic wave potential. We consider parameters ranging from semiconductor plasmas to metallic plasmas and electron densities of compressed matter such as in laser compression schemes and dense astrophysical objects. Owing to the wave diffraction caused by overlapping electron wave function because of the Heisenberg uncertainty principle in dense plasmas, we have the possibility of Landau damping of the high-frequency electron plasma oscillations at large enough wavenumbers. The exact dispersion relations for the electron plasma oscillations are solved numerically and compared with the ones obtained by using approximate formulas for the electron susceptibility in the high- and low-frequency cases.

scholarly journals Probing ultrafast dynamics of solid-density plasma generated by high-contrast intense laser pulses

2018 ◽  
Vol 25 (1) ◽  
pp. 013102 ◽  
Author(s):  
Kamalesh Jana ◽  
David R. Blackman ◽  
Moniruzzaman Shaikh ◽  
Amit D. Lad ◽  
Deep Sarkar ◽  
...  
Keyword(s):  
Laser Pulses ◽  
Intense Laser ◽  
Ultrafast Dynamics ◽  
High Contrast ◽  
Solid Density ◽  
Intense Laser Pulses ◽  
Density Plasma

Effect of dust grains on propagation of electromagnetic wave in a cold quantum dusty plasma

2015 ◽  
Vol 81 (2) ◽  
Author(s):  
Punit Kumar ◽  
Abhisek Kumar Singh
Keyword(s):  
Magnetic Field ◽  
Electromagnetic Wave ◽  
Incident Radiation ◽  
Intense Laser ◽  
Quantum Plasma ◽  
Intense Laser Pulse ◽  
One Dimensional ◽  
Linearly Polarized ◽  
Linearly Polarized Radiation ◽  
Polarized Radiation

A one-dimensional nonlinear theoretical analysis for the interaction of intense laser pulse with high density electron-ion-dust quantum plasma. The linearly polarized radiation propagates in the presence of a constant magnetic field applied perpendicular to both the electric vector and the direction of propagation. Dispersion of the incident radiation and generation of its harmonics are studied.

scholarly journals Dispersion relations for electromagnetic waves in a dense magnetized plasma

2008 ◽  
Vol 74 (6) ◽  
pp. 719-723 ◽  
Author(s):  
P. K. SHUKLA ◽  
L. STENFLO
Keyword(s):  
Electromagnetic Waves ◽  
Dispersion Relations ◽  
Magnetized Plasma ◽  
Intense Laser ◽  
Spin Effect ◽  
Bohm Potential ◽  
Electron Current Density ◽  
Astrophysical Objects ◽  
Linearly Polarized ◽  
Elliptically Polarized

AbstractDispersion relations for elliptically polarized extraordinary as well as linearly polarized ordinary electromagnetic waves propagating across an external magnetic field in a dense magnetoplasma are derived, taking into account the combined effects of the quantum electrodynamical (QED) field, as well as the quantum forces associated with the Bohm potential and the magnetization energy of the electrons due to the electron-1/2 spin effect. The QED (vacuum polarization) effects, which contribute to the nonlinear electron current density, modify the refractive index. Our results concern the propagation characteristics of perpendicularly propagating high-frequency electromagnetic waves in dense astrophysical objects (e.g. neutron stars and magnetars), as well as the next-generation intense laser–solid density plasma interaction experiments and quantum free-electron laser schemes.

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