Effect of temporal asymmetry of the laser pulse on electron acceleration in vacuum

Rezaei-Pandari, Mohammad; Akhyani, Mina; Jahangiri, Fazel; Niknam, A. R.; Massudi, Reza

doi:10.1016/j.optcom.2018.07.081

Cited by 12 publications

(4 citation statements)

References 53 publications

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“…This is because the electric field and power of the excited UHW increases at a higher value of ω c , which increases the energy gain of the electrons. The energy gain by electrons in the particle acceleration process is also affected by the symmetry/asymmetry of the lasers [42,43]. 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].…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

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%

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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“…In this section we discuss the effect of shifting the position of the initial intensity peak z F or the focus of the laser pulse while keeping the electrons at z 0 = 0 on the optical axis. The shift of the intensity peak corresponds to changing the interaction domain of the laser pulse [43], and therefore we can investigate the dependence of energy gain on the temporal envelope and the longitudinal position of the focus of the pulse.…”

Section: B Optimizing the Waist Of Gaussian Pulsesmentioning

confidence: 99%

Optimizing direct laser-driven electron acceleration and energy gain at ELI-NP

Molnar,

Stutman,

Ticos

2020

Preprint

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“…Using different laser-beam profiles and polarizations, the effects of an externally applied magnetic field, laser-spot size, laser-pulse duration, laser intensity, and the initial phase in improving the quality and energies of the accelerated beams have been reported [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Electron Acceleration by a radially polarised cosh-Gaussian laser beam in vacuum

Singh¹,

Rajput²,

Ghotra³

et al. 2021

Commun. Theor. Phys.

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In this paper, a radially polarised cosh-Gaussian laser beam (CGLB) is used to study the electron acceleration produced in vacuum. A highly energetic electron beam can be achieved by a CGLB, even with comparatively low-powered lasers. The properties of a CGLB cause it to focus earlier, over a shorter duration than a Gaussian laser beam, which makes it suitable for obtaining high energies over small durations. It is found that the energy gained by the electrons strongly depends upon the decentering parameter of the laser profile. It is also observed that for a fixed value of energy gain, if the decentering parameter is increased, then the intensity of the laser field decreases. The dependence of the energy gained by electrons on the laser intensity and the laser-spot size is also studied.

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Effect of temporal asymmetry of the laser pulse on electron acceleration in vacuum

Cited by 12 publications

References 53 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

Optimizing direct laser-driven electron acceleration and energy gain at ELI-NP

Electron Acceleration by a radially polarised cosh-Gaussian laser beam in vacuum

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