Bright X/$$\gamma$$-ray emission and lepton pair production by strong laser fields: a review

Yu, Tong-Pu; Liu, Ke; Zhao, Jie; Zhu, Xing-Long; Lu, Yu; Cao, Yue; Zhang, Hao; Shao, Fu-Qiu; Sheng, Zheng-Ming

doi:10.1007/s41614-024-00158-3

Cited by 3 publications

References 282 publications

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Rotating attosecond electron sheets and ultra-brilliant multi-MeV γ-rays driven by intense laser pulses

Hu,

Yu,

Cao

et al. 2024

High Pow Laser Sci Eng

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Isolated multi-MeV $\gamma$ -rays with attosecond duration, high collimation and beam angular momentum (BAM) may find many interesting applications in nuclear physics, astrophysics, etc. Here, we propose a scheme to generate such $\gamma$ -rays via nonlinear Thomson scattering of a rotating relativistic electron sheet driven by a few-cycle twisted laser pulse interacting with a micro-droplet target. Our model clarifies the laser intensity threshold and carrier-envelope phase effect on the generation of the isolated electron sheet. Three-dimensional numerical simulations demonstrate the $\gamma$ -ray emission with 320 attoseconds duration and peak brilliance of $9.3\times 10^{24}$ photons s ${}^{-1}$ mrad ${}^{-2}$ mm ${}^{-2}$ per 0.1 $\%$ bandwidth at 4.3 MeV. The $\gamma$ -ray beam carries a large BAM of $2.8 \times 10^{16}\mathrm{\hslash}$ , which arises from the efficient BAM transfer from the rotating electron sheet, subsequently leading to a unique angular distribution. This work should promote the experimental investigation of nonlinear Thomson scattering of rotating electron sheets in large laser facilities.

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Rotating attosecond electron sheets and ultra-brilliant multi-MeV γ-rays driven by intense laser pulses

Hu,

Yu,

Cao

et al. 2024

High Pow Laser Sci Eng

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Generation of quasi-monoenergetic proton beams from near-critical density plasmas irradiated by picosecond laser pulses

Wei,

Wang,

Zou

et al. 2024

Physics of Plasmas

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Laser-driven high-quality ion beams hold immense potential for applications in diverse fields such as tumor therapy, fast ignition, and so on. However, current experimental ion beams are often constrained by either a large energy spread or relatively low energy. In this paper, we proposed a novel scheme for generating quasi-monoenergetic proton beams by irradiating near-critical-density plasmas, which have a density gradient with a picosecond laser pulse. This approach leverages two key aspects: first, the sustained interaction between the laser pulse and the plasma enhances the duration of magnetic vortex acceleration, thereby promoting extended ion acceleration. Second, the utilization of a multi-species target facilitates the formation of a dual-peaked electric field, which leads to the accumulation of protons in the negative gradient of the accelerating phase, resulting in a quasi-monoenergetic proton beam. The two-dimensional particle-in-cell simulation reveals that by employing a laser intensity of 1.37 × 1020 W/cm2 with a pulse duration of 0.5 ps, we can achieve a carbon ion beam with an energy of 50 MeV/u, and a quasi-monoenergetic proton beam exhibiting a cutoff energy of 160 MeV/u, a peak energy of 75 MeV/u, an energy spread of 3.1 %, and an angle divergence of ∼ 3.2°. Furthermore, the quasi-monoenergetic property is corroborated in three-dimensional simulation results, underscoring the robustness and effectiveness of our proposed scheme.

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Electron acceleration via vacuum bubble field in Laguerre Gaussian laser

Wang,

Lv,

Sun

et al. 2024

Preprint

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Enhancing the flux, brightness, and density of energetic electron beams is crucial for applications such as ultrafast electron diffraction, fast ignition in confined fusion, and free-electron lasers. Laser Wakefield Acceleration (LWFA) has demonstrated potential for accelerating collimated electrons up to 10 Giga-electron volts in 'bubble-like' plasma channels. However, its reliance on the plasma environment constrains the enhancement of acceleration stability and gradients. In contrast, Direct Laser Acceleration (DLA) does not depend on plasma and can achieve efficient acceleration with traditional Gaussian lasers. Nonetheless, traditional DLA often results in uncertain and divergent electron beams due to the ponderomotive force of the Gaussian laser. To overcome these limitations, our proof-of-principle experiments achieved collimated acceleration using a left circularly polarized Laguerre Gaussian (LG) laser in a DLA mechanism. Studies revealed that a novel vacuum bubble field formed by the LG laser is critical in simultaneously concentrating and accelerating electrons. This vacuum bubble field mechanism integrates the advantages of both traditional DLA and LWFA, offering significant benefits for applications such as particle collimation, high-flux particle sources, and coherent radiation sources in new relativistic regimes.

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Bright X/$$\gamma$$-ray emission and lepton pair production by strong laser fields: a review

Cited by 3 publications

References 282 publications

Rotating attosecond electron sheets and ultra-brilliant multi-MeV γ-rays driven by intense laser pulses

Rotating attosecond electron sheets and ultra-brilliant multi-MeV γ-rays driven by intense laser pulses

Generation of quasi-monoenergetic proton beams from near-critical density plasmas irradiated by picosecond laser pulses

Electron acceleration via vacuum bubble field in Laguerre Gaussian laser

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