Temperature effects on the nonstationary Karpman–Washimi ponderomotive magnetization in quantum plasmas

Na, Sang-Chul; Jung, Young-Dae

doi:10.1063/1.3176616

Cited by 26 publications

(6 citation statements)

References 12 publications

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“…Considering the quantum mechanical effect, the Fermi gas pressure and the Bohm potential, the dielectric constant for unmagnetized and collisionless thermal quantum plasma takes this form [52,57]:…”

Section: Theorymentioning

confidence: 99%

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Relativistic self-focusing of intense laser beam in thermal collisionless quantum plasma with ramped density profile

Zare

Yazdani

Rezaee

et al. 2015

Phys. Rev. ST Accel. Beams

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Propagation of a Gaussian x-ray laser beam has been analyzed in collisionless thermal quantum plasma with considering a ramped density profile. In this density profile due to the increase in the plasma density, an earlier and stronger self-focusing effect is noticed where the beam width oscillates with higher frequency and less amplitude. Moreover, the effect of the density profile slope and the initial plasma density on the laser propagation has been studied. It is found that, by increasing the initial density and the ramp slope, the laser beam focuses faster with less oscillation amplitude, smaller laser spot size and more oscillations. Furthermore, a comparison is made among the laser self-focusing in thermal quantum plasma, cold quantum plasma and classical plasma. It is realized that the laser self-focusing in the quantum plasma becomes stronger in comparison with the classical regime.

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Section: Theorymentioning

confidence: 99%

“…The self-focusing of an intense laser beam in the classical plasma and in the cold quantum plasma has been studied by considering different plasma density profiles [49][50][51][52]. In the thermal homogenous quantum plasma, the laser selffocusing effect has been investigated by Patil et al [48].…”

Section: Introductionmentioning

confidence: 99%

Relativistic self-focusing of intense laser beam in thermal collisionless quantum plasma with ramped density profile

Zare

Yazdani

Rezaee

et al. 2015

Phys. Rev. ST Accel. Beams

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show abstract

“…We have considered the plasma dielectric function in the relativistic manner for unmagnetized and collisionless CQP in the following form [65], [66]:…”

Section: Self-focusing Of Chg Laser Beam: Off-axis Contributionmentioning

confidence: 99%

Improved Focusing of a cosh-Gaussian Laser Beam in Quantum Plasma: Higher Order Paraxial Theory

Habibi

Ghamari

2015

IEEE Trans. Plasma Sci.

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This paper presents a preliminary study on relativistic self-focusing of cosh-Gaussian (ChG) laser beam and its dependence on the value of decentered parameter b through cold quantum plasma (CQP). In contrast to the earlier work on self-focusing in such a medium, higher order terms in the expansion of the dielectric function and the eikonal have been taken into account. It is seen that the inclusion of such terms (up to r 4 ) in the extended paraxial theory does significantly affect the dependence of the beamwidth parameter ( f ) on the distance of propagation and allows the modification of the shape of the radial intensity distribution. We have also found that ChG in comparison with Gaussian beam has caused better focusing in the CQP, which is very important for some applications in high power laser-dense plasma interactions.Index Terms-Cold quantum plasma (CQP), coshGaussian (ChG), relativistic self-focusing (RSF), the extended paraxial approximation approach.

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“…The nonlinear and saturating character of the dielectric permittivity in the collisionless and collisional quantum plasma has been caused to some interesting features in the propagation of the laser beam. 24,49,50,[65][66][67][68] Therefore, in this paper, we have considered the plasma dielectric function for unmagnetized and collisionless WQP in the following form: 49 e r; z ð Þ ¼ 1 À…”

Section: Beam-width Parameter Evolutionmentioning

confidence: 99%

“…Temperature effects are also included in dense degenerate plasma via a warm quantum model. 49,50 Arista and Brandt 51 have calculated the dielectric function e k; x ð Þ of an electron plasma in thermal equilibrium for all degrees of plasma degeneracy. They have incorporated thermal and quantum effects on e k; x ð Þ, and included the results from classical and semi-classical approximations as well as those of quantum calculations for the degenerate plasma.…”

mentioning

confidence: 99%

Relativistic self-focusing of ultra-high intensity X-ray laser beams in warm quantum plasma with upward density profile

Habibi

Ghamari

2014

Physics of Plasmas

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The results of a numerical study of high-intensity X-ray laser beam interaction with warm quantum plasma (WQP) are presented. By means of an upward ramp density profile combined with quantum factors specially the Fermi velocity, we have demonstrated significant relativistic self-focusing (RSF) of a Gaussian electromagnetic beam in the WQP where the Fermi temperature term in the dielectric function is important. For this purpose, we have considered the quantum hydrodynamics model that modifies refractive index of inhomogeneous WQPs with the inclusion of quantum correction through the quantum statistical and diffraction effects in the relativistic regime. Also, to better illustration of the physical difference between warm and cold quantum plasmas and their effect on the RSF, we have derived the envelope equation governing the spot size of X-ray laser beam in Q-plasmas. In addition to the upward ramp density profile, we have found that the quantum effects would be caused much higher oscillation and better focusing of X-ray laser beam in the WQP compared to that of cold quantum case. Our computational results reveal the importance of the use of electrons density profile and Fermi speed in enhancing self-focusing of laser beam.

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Temperature effects on the nonstationary Karpman–Washimi ponderomotive magnetization in quantum plasmas

Cited by 26 publications

References 12 publications

Relativistic self-focusing of intense laser beam in thermal collisionless quantum plasma with ramped density profile

Relativistic self-focusing of intense laser beam in thermal collisionless quantum plasma with ramped density profile

Improved Focusing of a cosh-Gaussian Laser Beam in Quantum Plasma: Higher Order Paraxial Theory

Relativistic self-focusing of ultra-high intensity X-ray laser beams in warm quantum plasma with upward density profile

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