Electron acceleration and spatio-temporal variation of Laguerre-Gaussian laser pulse in relativistic plasma

Kad, Proxy; Singh, Arvinder

doi:10.1140/epjp/s13360-022-03054-2

Cited by 14 publications

(4 citation statements)

References 32 publications

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“…It is important to mention here that the overall energy gain by electrons through UHW excited by the cosh-Gaussian laser beam is higher than that of the hollow Gaussian laser beams [22]. However, the energy gain increases when the UHW is excited by a Laguerre-Gaussian (LG) laser pulse in an exponential density ramp plasma under an external magnetic field [24,25].…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

“…The excitation of UHW by intense laser beams has been extensively investigated in laser-plasma interactions [9][10][11][12][13][14][15][16][17][18][19][20][21][22][23][24][25]. In these studies, various profiles of laser beam such as Gaussian, hollow Gaussian, q-Gaussian, Laguerre-Gaussian, etc have been used.…”

Section: Introductionmentioning

confidence: 99%

“…They found that the energy gain for electrons is up to 400 MeV/mm. They have also studied the excitation of UHW and electron acceleration by a Laguerre-Gaussian laser beam in the magnetoplasma in the presence of relativistic and ponderomotive nonlinearities [25]. Other relevant studies on electron acceleration by intense laser beams in plasma have been reported in the literature [26][27][28].…”

Section: Introductionmentioning

confidence: 99%

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Effect of mutual interaction of two cosh-Gaussian laser beams on upper hybrid wave excitation and subsequent electron acceleration

Purohit

2024

Phys. Scr.

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This paper presents the excitation of an upper hybrid wave by resonant excitation of two intense cosh-Gaussian laser beams of frequencies ω1 and ω2 in a collisionless plasma. The excited upper hybrid wave is used for electron acceleration which accelerates the electrons towards higher energy. The acceleration of electrons through an excited upper hybrid wave has also been studied. This study has been analysed using the Wentzel Kramers Brillouin (WKB) and paraxial-ray approximation, where relativistic and ponderomotive nonlinearities are employed together. Analytical expressions for the beam width/intensity of the cosh-Gaussian laser beams, the electric field/power of the excited upper hybrid wave and the electron acceleration have been derived, which have been solved numerically for an established set of laser and plasma parameters. The results are also compared to relativistic nonlinearity. It has been observed that the mutual interaction of two cosh-Gaussian laser beams at a difference frequency significantly affects the self-focusing of each beam, leading to an increase in the amplitude/power of the upper hybrid wave as well as energy gain by the electrons. The effect of the magnetic field (ωc) and decentered parameter (b) on the power of the excited upper hybrid wave and the energy gain by the electrons are also explored. The results show that the power of upper hybrid wave and the energy gain by the electrons increase at higher values of b and ωc.

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Section: Numerical Results and Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of mutual interaction of two cosh-Gaussian laser beams on upper hybrid wave excitation and subsequent electron acceleration

Purohit

2024

Phys. Scr.

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“…Laser–plasma interaction has led to many developments in terahertz generation (Sobhani, Dadar & Feili 2017; Sun, Wang & Zhang 2022), second-harmonic generation (Upadhyay & Tripathi 2005; Sharma, Thakur & Kant 2020), plasma-wakefield excitation for particle acceleration (Kim et al 2021; Kad & Singh 2022 b ), etc. Plasma being a nonlinear medium has an extraordinarily high damage threshold, and is thus capable of sustaining a high-intensity electric field (Hassan et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Generation of terahertz radiation by a Hermite–Gaussian laser beam inside magnetoplasma with a density ramp

2023

Self Cite

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In the present scheme of work, the Hermite–Gaussian (HG) laser beam dynamics has been investigated under the influence of an upward density ramp inside magnetized plasma, where both relativistic and ponderomotive nonlinearities are operative. One can achieve self-focusing of laser beam due to the change in the medium's dielectric function, which comes into operation due to the expulsion of plasma electrons from the high intensity to the low-intensity region by ponderomotive force and their motion at relativistic speeds. The dynamics of the laser beam and terahertz generation have been investigated by using the moment theory approach. It has been observed from the present analysis that the dynamics of the laser beam and the production of terahertz radiations strongly depends upon the HG laser beam and plasma parameters. In addition to this, the effect of density ramp and magnetic field has also been investigated on the efficiency of terahertz generation. It has been observed that higher-order modes of the HG laser beam play a dominant role in the production of terahertz radiations.

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Effect of different Gaussian-like laser profiles on electron energy gain in laser wakefield acceleration

Sharma,

Kant,

Thakur

2023

Opt Quant Electron

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Electron acceleration and spatio-temporal variation of Laguerre-Gaussian laser pulse in relativistic plasma

Cited by 14 publications

References 32 publications

Effect of mutual interaction of two cosh-Gaussian laser beams on upper hybrid wave excitation and subsequent electron acceleration

Effect of mutual interaction of two cosh-Gaussian laser beams on upper hybrid wave excitation and subsequent electron acceleration

Generation of terahertz radiation by a Hermite–Gaussian laser beam inside magnetoplasma with a density ramp

Effect of different Gaussian-like laser profiles on electron energy gain in laser wakefield acceleration

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