The suppression of radiation reaction and laser field depletion in laser-electron beam interaction

Ong, J. F.; Moritaka, Toseo; Takabe, H.

doi:10.1063/1.5012937

Cited by 6 publications

(3 citation statements)

References 37 publications

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“…Note that there are more appropriate choices for the temporal profile such as the hyperbolic secant g (t, z) ∼ 1/ cosh t−(z−zF )/c τ0 , see Refs. [30][31][32] for more details. Using this profile we found that the energy gain may be reduced by as much as 30% compared to the Gaussian.…”

Section: Direct Laser-driven Electron Acceleration In Helical Beamsmentioning

confidence: 99%

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

2020

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A detailed study of direct laser-driven electron acceleration in paraxial Laguerre-Gaussian modes corresponding to helical beams LG0m with azimuthal modes m = {1, 2, 3, 4, 5} is presented. Due to the difference between the ponderomotive force of the fundamental Gaussian beam LG00 and helical beams LG0m we found that the optimal beam waist leading to the most energetic electrons at full width at half maximum is more than twice smaller for the latter and corresponds to a few wavelengths ∆w0 = {6, 11, 19} λ0 for laser powers of P0 = {0.1, 1, 10} PW. Using these optimal values we have observed that the average kinetic energy gain of electrons is about an order of magnitude larger in helical beams compared to the fundamental Gaussian beam. This average energy gain increases with the azimuthal index m leading to collimated electrons of a few 100 MeV energy in the direction of the laser propagation.

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Section: Direct Laser-driven Electron Acceleration In Helical Beamsmentioning

confidence: 99%

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

2020

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“…In term of probability, the crosssection of pair production is proportional to c - ). Due to ponderomotive suppression [66], the effective value of χ e becomes small even if a 0 =200. Thus, pair production via the Breit-Wheeler process is negligible.…”

Section: Discussionmentioning

confidence: 99%

Feasibility studies of an all-optical and compact γ-ray blaster using a 1 PW laser pulse

Ong¹,

Seto²,

Berceanu³

et al. 2019

Plasma Phys. Control. Fusion

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Recently, the all-optical Compton laser backscattering setup has become a promising approach in producing high-quality γ-rays. However, this method only produces a single γ-ray beam. In this paper, we report on the numerical study for the feasibility of producing double γ-ray beams using a 1 PW laser. Our method utilizes the all-optical setup with a structured solid target as a reflecting foil. The laser pulse is reflected by the foil after propagating a few millimeters into the underdense plasma. The reflected laser intensity is strongly boosted by the foil to invoke a radiation reaction as nonlinear Compton backscattering. Subsequently, the electron bunch traverses the foil, generating bremsstrahlung. Our simulation results show that a collimated γ-ray beam from the nonlinear Compton backscattering with the peak brilliance of 6.7×10 20 photons/s/mm 2 /mrad 2 /0.1%BW at 15 MeV is produced. Another collimated γ-ray beam with the peak brilliance of 2.1×10 6 photons/s/mm 2 /mrad 2 /0.1%BW is produced by bremsstrahlung. The combined γ-ray beams act as a blaster and are of particular interest in nuclear interactions induced by high-energy photons.

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“…Note that there are more appropriate choices for the temporal profile such as the hyperbolic secant g(t, z) ∼ 1/cosh((t − (z − z F )/c)/τ 0 ); see [32][33][34] for more details. Using this profile, we found that the energy gain may be reduced by as much as 30% compared to Gaussian.…”

Section: Direct Laser-driven Electron Acceleration In Helical Beamsmentioning

confidence: 99%

Direct Laser-Driven Electron Acceleration and Energy Gain in Helical Beams

Molnár

Stutman

2021

Laser Part. Beams

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A detailed study of direct laser-driven electron acceleration in paraxial Laguerre–Gaussian modes corresponding to helical beams LG 0 m with azimuthal modes m = 1,2,3,4,5 is presented. Due to the difference between the ponderomotive force of the fundamental Gaussian beam LG 00 and helical beams LG 0 m , we found that the optimal beam waist leading to the most energetic electrons at full width at half maximum is more than twice smaller for the latter and corresponds to a few wavelengths Δ w 0 = 6,11,19 λ 0 for laser powers of P 0 = 0.1 , 1,10 PW. We also found that, for azimuthal modes m ≥ 3 , the optimal waist should be smaller than Δ w 0 < 19 λ 0 . Using these optimal values, we have observed that the average kinetic energy gain of electrons is about an order of magnitude larger in helical beams compared to the fundamental Gaussian beam. This average energy gain increases with the azimuthal index m leading to collimated electrons of a few 100 MeV energy in the direction of the laser propagation.

show abstract

The suppression of radiation reaction and laser field depletion in laser-electron beam interaction

Cited by 6 publications

References 37 publications

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

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

Feasibility studies of an all-optical and compact γ-ray blaster using a 1 PW laser pulse

Direct Laser-Driven Electron Acceleration and Energy Gain in Helical Beams

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