Two-dimensional angular energy spectrum of electrons accelerated by the ultra-short relativistic laser pulse

Borovskiy, A. V.; Galkin, A. L.; Kalashnikov, M. P.

doi:10.1063/1.4917232

Cited by 8 publications

(5 citation statements)

References 14 publications

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“…In experiments, it is difficult to achieve symmetric trajectories because this requires compensation of the impact action of the field on ionization electrons. This fact is insignificant, for example, for description of the energyangle spectrum of accelerated electrons [11], because the main part of the spectrum is formed by off-axis electrons. The symmetric trajectory structure ensures the maximum characteristics of electron emission.…”

Section: Discussionmentioning

confidence: 99%

Saturation of electron emission with increasing ultrarelativistic intensity of the Gaussian laser pulse

Borovskiy¹,

Galkin²

2021

Laser Phys. Lett.

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Symmetric electron trajectories in the field of a Gaussian laser pulse are calculated as trajectories with compensation of the dynamic shock at the initial instant of motion. It is shown that the symmetric trajectories have an extremal property, namely, at a fixed peak intensity of the pulse, the time dependence of the electron emission intensity from a symmetric trajectory has the maximum width and amplitude compared to all other trajectories. Formation of paired peaks of electron emission intensity with changing laser pulse peak intensity is analyzed. It is found that the electron emission energy saturates with increasing peak intensity of the laser field in the ultrarelativistic region.

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Section: Discussionmentioning

confidence: 99%

Saturation of electron emission with increasing ultrarelativistic intensity of the Gaussian laser pulse

Borovskiy¹,

Galkin²

2021

Laser Phys. Lett.

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“…The second property means that if an electron position is rotated around the laser pulse axis, the plane of the electron trajectory rotates over the same polar angle, with the residual energy and ejection zenith angle staying unchanged. The properties (a)-(c) stem from simulations and are experimentally confirmed [6] (electron ejection symmetry regardless of laser polarization).…”

Section: Electron Dynamic and Emissions In The Field Of A Single Gaus...mentioning

confidence: 74%

“…The maximal effect is achieved for the electrons emerging before the focus, whose trajectories pass the proximity of the focus. Simulations [6] show that the maximal residual energy makes several MeV.…”

Section: Electron Dynamic and Emissions In The Field Of A Single Gaus...mentioning

confidence: 96%

Electron acceleration and electromagnetic emission in the field of intersecting Gaussian pulses

Borovskiy¹,

Galkin²

2020

Laser Phys.

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Numerical simulations of the acceleration of an electron by a pair of phased intersecting Gaussian laser beams and of the electromagnetic emissions by the electrons are carried out. The study is based on solving equations of the relativistic electron dynamic with the corresponding Lorentz force. The electron emissions are calculated with the help of the Lienard–Wiechert potentials, taking into account the retardation of the propagating fields. Differences between the electron acceleration and emissions in intersecting laser beams and in a single Gaussian beam are examined. It is shown that the integral emission energy is maximal for the symmetric trajectory and that the acceleration and emission are competing processes.

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“…The movement of an electron from the focus is usually considered. At the same time, it was shown in [10] that ionization electrons can appear in a wide region in the vicinity of the focus. In this regard, for a correct description of the motion of an electron with an arbitrary initial point, longitudinal-transverse Gaussian fields should be used [11].…”

Section: Discussionmentioning

confidence: 92%

Electron emission from the focus of the Gaussian pulse

Borovskiy¹,

Galkin²

2022

Laser Phys.

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For a symmetric trajectory of an electron in the field of a Gaussian pulse, the parameters of radiation from a section in the vicinity of the focus are studied. It is shown that the modulus of velocity and modulus of acceleration are quasi-periodic, their maxima are separated in time. The radiation of an electron in the form of plane waves in the far zone is analyzed, and the intensity distribution over the solid angle is obtained. The radiation directivity diagrams are constructed, and the time profile of the radiation power is obtained. The difference from the dipole approximation is discussed. We consider the radiation of an electron that appears in the vicinity of the focus as a result of ionization.

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Two-dimensional angular energy spectrum of electrons accelerated by the ultra-short relativistic laser pulse

Cited by 8 publications

References 14 publications

Saturation of electron emission with increasing ultrarelativistic intensity of the Gaussian laser pulse

Saturation of electron emission with increasing ultrarelativistic intensity of the Gaussian laser pulse

Electron acceleration and electromagnetic emission in the field of intersecting Gaussian pulses

Electron emission from the focus of the Gaussian pulse

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