Relativistic self-distortion of a laser pulse and ponderomotive acceleration of electrons in an axially inhomogeneous plasma

Singh, Ranveer; Sharma, Anamika; Tripathi, V. K.

doi:10.1017/s0263034610000200

Cited by 14 publications

(7 citation statements)

References 48 publications

(47 reference statements)

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“…This rate is less for larger values of amplitude because of the fact that there is an increase in refractive index with increase in electron mass. From the figure, it is clear that in the classical plasma (ℏ = 0), the refractive index is lowest and is in agreement with earlier work [62]. The refractive index for spin-polarized quantum plasma is lower by about 8% as compared to that of quantum plasma without spin polarization for the chosen set of parameters.…”

Section: Pulse Distortionsupporting

confidence: 89%

Ponderomotive effects in spin—polarized quantum plasma

Singh¹,

Kumar²

2023

Laser Phys.

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Analysis of ponderomotive effects exciting from propagation of an intense laser pulse through high density quantum plasma under the influence of an axial magnetic field taking into consideration the spin–spin (up and down) exchange interaction. The effects of electron Fermi pressure, quantum Bohm potential, and electron spin have been included in the analysis. Spin polarization is a result of the concentration difference of opposite spin electrons which is produced under the influence of the applied magnetic field. Axial gradient of the ponderomotive potential of laser has been applied for the electron acceleration. An analytic solution of the electron energy gain is obtained and the influence of spin polarization is analyzed both numerically and analytically. It is observed that spin polarization, density perturbation and the magnetic field effect electron acceleration dramatically. Further, the effect of nonlinearity on the refractive index of plasma has been studied.

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Section: Pulse Distortionsupporting

confidence: 89%

Ponderomotive effects in spin—polarized quantum plasma

Singh¹,

Kumar²

2023

Laser Phys.

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“…The importance of density ripple in the plasma has also been discussed by some authors in context of other phenomena taking place in the laser-plasma interaction (Singh et al, 2010;Xia & Xu, 2013;Xia, 2014). Significant amount of research is going into the fabrication of such kind of structure due to their other applications such as in the development plasma photonic devices.…”

Section: Introductionmentioning

confidence: 99%

THz radiation by amplitude-modulated self-focused Gaussian laser beam in ripple density plasma

Kumar

Singh

et al. 2015

Laser Part. Beams

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The effect of self-focusing and defocusing on terahertz (THz) generation by amplitude-modulated Gaussian laser beam in rippled density plasma is investigated. A stronger transient transverse current is generated by transverse component of ponderomotive force exerted by laser on electrons that drives radiation at the modulation frequency (which is chosen to be in the THz domain) because of the variation in intensity in the direction transverse to the laser propagation. Numerical simulations indicate the enhancement of THz yield by many folds due to self-focusing of laser beam in comparison with that without self-focusing. The transient focusing of laser beam and its effect on the generated THz amplitude has also been studied.

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“…Hence, the investigation of the Stamper force, pon- deromotive acceleration, and self-focusing effects on the radiated power in quantum plasmas will be treated elsewhere. Very recently, excellent investigations [24,25] on the ponderomotive acceleration of electrons by a short laser pulse undergoing relativistic self-focusing and the relativistic self-distortion of a Gaussian laser pulse have been investigated in plasmas. Then, the investigation of the plasma screening effect on the ponderomotive acceleration in quantum plasmas will also be treated elsewhere.…”

Section: Streaming and Resonant Effectsmentioning

confidence: 99%

Karpman–Washimi Ponderomotive Magnetization and Radiated Power: Streaming and Resonant Effects

Jung

2013

Zeitschrift Für Naturforschung A

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The electron streaming and resonance effects on the non-stationary Karpman-Washimi nonlinear ponderomotive magnetization and radiated power are investigated in a quantum plasma. The ponderomotive Karpman-Washimi magnetization and radiation power due to the ponderomotive force are obtained as functions of the electron streaming velocity, Fermi velocity, wave frequency, and wave number. In small wave numbers, it is found that the electron streaming effect enhances the Karpman-Washimi ponderomotive magnetization. It is found that the electron streaming effect shifts the resonant wave number to the smaller wave number domain. It is also found that the quantum effect reduces the electron streaming velocity for the ponderomotive magnetization near the resonant wave number. In addition, the wave frequency for the resonant Karpman-Washimi radiated power is found to be increased with increasing wave number.

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Relativistic self-distortion of a laser pulse and ponderomotive acceleration of electrons in an axially inhomogeneous plasma

Cited by 14 publications

References 48 publications

Ponderomotive effects in spin—polarized quantum plasma

Ponderomotive effects in spin—polarized quantum plasma

THz radiation by amplitude-modulated self-focused Gaussian laser beam in ripple density plasma

Karpman–Washimi Ponderomotive Magnetization and Radiated Power: Streaming and Resonant Effects

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