Relativistic self-focusing in underdense plasma

Feit, Michael D.; Garrison, J. C.; Komashko, A.; Musher, S. L.; Rubenchik, A. M.; Turitsyn, Sergei K.

doi:10.1063/1.53536

Cited by 2 publications

(3 citation statements)

References 4 publications

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“…Substituting Eqs. ( 16) and (17) in Eq. ( 15) and equating the coefficient of r 2 , we obtain the expression for the beam width parameter (f) as…”

Section: Analytical Modelmentioning

confidence: 99%

“…Self-focusing of laser beams in unmagnetized plasma has been investigated to a great extent [11][12][13][14][15][16][17][18]. When an intense laser beam interacts with a plasma, strong magnetic fields are generated [19,20] that affect the propagation of the laser beam in the plasma because the canonical momentum is not conserved for the magnetic plasma to interact with the intense radiation [21].…”

Section: Introductionmentioning

confidence: 99%

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Effect of an external magnetic field on the self-focusing of a cosh-Gaussian laser beam in plasma under the relativistic-ponderomotive effect

Purohit¹

2022

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This work presents an analytical and numerical study of the relativistic-ponderomotive effect on self-focusing of an intense cosh-Gaussian laser beam in a collisionless magnetized plasma by considering an external magnetic field in the direction of propagation of the laser beam. The nonlinear differential equation for the beam width parameter/intensity of a cosh-Gaussian laser beam in a magnetized plasma is obtained by Wentzel–Kramers–Brillouin (WKB) and paraxial-ray approximations. The self-focusing of the cosh-Gaussian beam at different values of the magnetic field parameter is investigated. The results have also been compared to relativistic nonlinearity. The results show that the self-focusing effect of cosh- Gaussian beam in magnetized plasma becomes stronger, when relativistic and ponderomotive nonlinearities acts together. In addition, the self-trapping of cosh-Gaussian beam in magnetized plasma has also been studied. Numerical results are presented for the well-established laser and plasma parameters.

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“…Substituting Eqs. ( 16) and (17) in Eq. ( 15) and equating the coefficient of r 2 , we obtain the expression for the beam width parameter (f) as…”

Section: Analytical Modelmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of an external magnetic field on the self-focusing of a cosh-Gaussian laser beam in plasma under the relativistic-ponderomotive effect

Purohit¹

2022

Preprint

View full text Add to dashboard Cite

show abstract

“…a 0 1. The relativistic self focusing is actually a relativistic phenomenon typical for ultraintense laser pulses propagating through underdense plasmas [3][4][5][6]. In fact the Lorentz factor of a free electron quivering under the action of a linearly polarized laser pulse is given by γ = 1 + a 2 /2 [7].…”

Section: Introductionmentioning

confidence: 99%