Nonlinear relativistic electron Thomson Scattering for laser radiation with orbital angular momentum

Pastor, I.; Alvarez‐Estrada, R. F.; Roso, L.; Castejón, F.; Guasp, J.

doi:10.1088/2399-6528/ab9afa

Cited by 12 publications

(3 citation statements)

References 29 publications

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“…NTS is the elastic scattering of electromagnetic radiation by a free electron in lasers. Usually, the laser intensity is ultra-high [7,8] since the advent of chirped pulse amplification technology [9], so the movement of free electrons in intense laser field becomes relativistic and nonlinear [10]. X-rays also γ-rays [11] can be generated by NTS, and is also widely applied in astrophysics [12] and biomedicine [13,14].…”

Section: Introductionmentioning

confidence: 99%

Generation of high-power and highly collimated X-rays through cross-collision between relativistic electron and tightly focused intense laser pulse

Yang

Wang

et al. 2023

Preprint

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Nonlinear cross Thomson scattering (NCTS) is the process that an electron cross-collides with a laser pulse, which has potential as a high-quality X-ray source. This paper reports a method to generate sideways X-ray with high power and good collimation through NCTS based on classical electrodynamics, through numerical simulation. When NCTS happens between a relativistic electron and a tightly focused circular polarized intense laser pulse, the initial distance of the electron with the interaction area has a significant effect of electron motion and radiation. The spatial radiation shows a shape of lying ‘U’, whose peak power increases first and then decreases as initial distance increasing. The peak power is more concentrate and is 31.4% higher than that of nonlinear inverse Thomson scattering. Changing the initial distance of electron can modulate the direction of NCTS radiation from 60° to 90° to the electron incident direction. The cut-off wavelength of its super continuity spectrum reaches 6.67Å. These results are helpful for understanding nonlinear Thomson scattering and designing practical high-quality X-ray sources.

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Section: Introductionmentioning

confidence: 99%

Generation of high-power and highly collimated X-rays through cross-collision between relativistic electron and tightly focused intense laser pulse

Yang

Wang

et al. 2023

Preprint

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“…This radiation is useful to determine the motion of the electron and thus the intensity of the laser fields [13]. Therefore the study of the driven electron is a fundamental problem with a large number of applications, see for example [14][15][16] and references therein for studies on driven electrons by ultra intense or ultrashort structured laser beams, including also the paraxial longitudinal fields. In the case of the onset of relativistic effects (say between 10 16 and 10 18 W/cm 2 ) we can neglect the influence of the emitted radiation to the dynamics of the electron.…”

Section: Introductionmentioning

confidence: 99%

Classical relativistic electron-field dynamics: Hamiltonian approach to radiation reaction

Álvarez-Estrada,

Pastor,

Roso

et al. 2023

J. Phys. Commun.

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Motivated by the renewed interest due to the presently available extreme light sources, the dynamics of a single classical relativistic (spinless) extended electron interacting with a classical electromagnetic field (an incoming radiation and the field radiated by the electron) is revisited. The field is treated in Lorentz gauge, with the Lorentz condition. By assumption, there is a crucial finite cut-off k max on the magnitude of any wavevector contributing to the field (preventing a point electron) and, for a simple formulation, the initial conditions for particle and fields are given in the infinitely remote past. In an infinite three-dimensional vacuum and in an inertial system, Hamilton’s dynamical equations for the particle and the complex field amplitudes acting as canonical variables (a's) yield an exact Lorentz force equation for the former, that includes the incoming radiation and an exact radiation reaction force F RR due to the field radiated by the electron. Uniform motion is obtained as a test of consistency. Based upon numerical computations, some approximations on F RR are given. A covariant formulation is also presented.

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“…In the meanwhile, CPA also pushes recent research into petawatt lasers towards the high-field domain, with intensities of up to 10 22 W cm −2 . For electrons in a nearinfrared intense laser pulse, Pasto [14] points out that the onset threshold of relativistic motion is 10 18 W cm −2 . This indicates that electrons' motion can be highly relativistic under conditions of 10 22 W cm −2 , when the outer electrons are ionized by such laser intensities and the released electrons can be accelerated to ultrafast speeds.…”

Section: Introductionmentioning

confidence: 99%

Nonlinear Thomson scattering from a tightly focused circularly polarized laser with varied incident-pulse durations

Wang

Qin

et al. 2020

Laser Phys.

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In this paper, nonlinear Thomson scattering in an intense ( a 0 = 6 ) tightly focused ( b 0 = 3 μ m ) Gaussian laser pulse is theoretically and numerically investigated to demonstrate varying spatial characteristics in the few-cycle and multi-cycle domains. We find that within ultrashort incident laser pulses, electrons have the potential to radiate a single attosecond pulse with a large signal-to-noise ratio, which turns into a train of attosecond pulses with a multi-cycle laser. Furthermore, a novel asymmetry phenomenon is discovered for the first time in the few-cycle domain whereby spatial radiation lasts for only one circle with apparent peaks and valleys, in contrast to the helical radiation pattern apparent in the multi-cycle domain, which gradually turns into a common fourfold-symmetry pattern. This means that the difference between tightly and non-tightly focused laser pulses can be bridged utilizing an appropriate incident pulse duration under specific conditions. The above difference is demonstrated again in the polar plane, where electrons change from a light-spot to a light-band radiation feature when the incident pulse duration increases.

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Nonlinear relativistic electron Thomson Scattering for laser radiation with orbital angular momentum

Cited by 12 publications

References 29 publications

Generation of high-power and highly collimated X-rays through cross-collision between relativistic electron and tightly focused intense laser pulse

Generation of high-power and highly collimated X-rays through cross-collision between relativistic electron and tightly focused intense laser pulse

Classical relativistic electron-field dynamics: Hamiltonian approach to radiation reaction

Nonlinear Thomson scattering from a tightly focused circularly polarized laser with varied incident-pulse durations

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