High-flux low-divergence positron beam generation from ultra-intense laser irradiated a tapered hollow target

Liu, Jianxun; Ma, Yunlong; Jing, Zhao; Yu, Tong-Pu; Yang, X. H.; Gan, Long-Fei; Zhang, Guo-Bo; Yan, Jian‐Feng; Zhuo, H. B.; Liu, Jin-Jin; Zhao, Yuan; Kawata, Shigeo

doi:10.1063/1.4932997

Cited by 20 publications

(12 citation statements)

References 43 publications

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“…In the direct way, laser irradiates a target directly to generate positrons, such as the multi-photon BW (Breit-Wheeler) process [11]. First, photon radiation can be described as e + mγ l → e + γ r on behalf of an energetic electron (e) interacting with laser photons (γ l ) to radiate a high-energy gamma photon (γ r ) [12,13]. Second, the BW process is initiated to generate positrons when these radiated gamma photons further interact with laser photons, which is γ r + nγ l → e + e + .…”

Section: Open Access Edited Bymentioning

confidence: 99%

High-flux positron generation via the ultra-intense laser irradiating density-modulated plasmas

Liu

Gao²,

Wang³

et al. 2023

Front. Phys.

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To investigate plasma density during the Breit–Wheeler positron generation, a comparative study of four plasma targets is performed via the PIC (particle-in-cell) code EPOCH. When an ultra-intense laser (2.8×1023 Wcm−2) is incident, more positrons with high energy are generated in the increasing density plasmas. The positron yield is already 1.5×108 with a cutoff energy of 2 GeV at t=37T0. It is demonstrated that increasing density plasmas will enhance gamma photon radiation and positron generation. In increasing density plasmas, under-dense plasmas favor electron acceleration, and over-dense plasmas will induce laser reflection. Cross sections of the Compton back-scattering and the BW positron generation are both increased via high-energy electrons colliding with the reflected laser. In addition, increasing the laser intensity will directly enhance positron generation. This investigation will further facilitate high-flux positron generation and application.

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Section: Open Access Edited Bymentioning

confidence: 99%

High-flux positron generation via the ultra-intense laser irradiating density-modulated plasmas

Liu

Gao²,

Wang³

et al. 2023

Front. Phys.

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“…3. The positron production of conical hollow targets can be increased by 5 orders of magnitude at the same laser intensity [19]. The composite target composed of nitrogen and gaseous aluminium can increase the yield of electronpositron pairs [20].…”

Section: The Influence Of Laser-plasma Interaction On the Qed Effectmentioning

confidence: 99%

QED effects exploration based on ultra-intensity lasers

Liang¹,

Qi²,

Xu³

et al. 2022

HSET

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With the development of the laser technology, the interaction between laser and matter is expected to enter the field of strong field QED, which has become as one of the hottest research directions. In this paper, we present the development of laser technology and the realization of ultra-intense ultra-short laser. Specifically, we demonstrate the progress of laser strong field QED and the laser-plasma interaction. Especially, the frontier progress of Laser-plasma QED, as well as its results of numerical simulation and the related QED process are demonstrated. Additionally, some relevant interesting strong field QED effects are also discussed. Besides, the frontier development of vacuum-related QED effects is evaluated, e.g., the vacuum birefringence. These results have important practical significance for some applications related to precision measurement, for example the optical clock. Moreover, they shed light on testing the basic theory of QED from a higher precision and guiding for new generation of laser development.

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“…[14,15] When the plasma is irradiated by such intense laser pulses, quantum electrodynamics (QED) effects become important, [16,17] and ultrarelativistic dense plasma can be produced. As one of the fundamental QED effects, electron-positron ( e − e + ) pair plasma production is highly concerned worldwide, [18][19][20][21][22][23] which is potentially interesting for a wide range of applications, such as particle physics, [24] plasma physics, [25] and laboratory astrophysics. [26] It is demonstrated experimentally that e − e + pair plasmas can be produced via the Bethe-Heitler (BH) process from picosecond-class laser pulses (with intensities of 10 18 W/cm 2 -10 20 W/cm 2 ) interacting with mm-thick high-Z target.…”

Section: Introductionmentioning

confidence: 99%

Dense pair plasma generation and its modulation dynamics in counter-propagating laser field

Liu¹,

Luo²,

Yuan³

et al. 2018

Chinese Phys. B

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With two-dimensional quantum electrodynamics (QED) particle-in-cell simulations, a dense electron-positron ( e − e + ) pair generation from laser-solid interactions is demonstrated. When the interaction of two linearly polarized laser pulses with a thin target enters into the relativistic transparency regime, a stable standing wave (SW) field can be formed by the overlap of the two counter-propagating laser pulses directly. The present study aims to clarify the effects of the SW field on the dynamics of e − e + pair plasmas. Our results indicate that under the combined effect of the SW field and radiation reaction (RR) effect, the created e − e + pairs can be trapped into the electric field nodes when the field strength is strong. The trapping effect contributes to the generation of γ AV ≥ 400 and ultra-dense pair plasmas in the two-side irradiation scheme. Despite different laser intensities, these pair plasmas have a Maxwellian spectral distribution with a peak energy of 150 MeV. Besides, the periodical modulation of the average energy, spatial, phase-space, and angular patterns of the e − e + pair plasmas can be triggered. In the angular patterns, as long as the SW field exists, pair plasmas can be pinched along the laser polarization direction. These results may offer a better understanding of the laser-solid interactions in the experiments when 10-PW laser facilities come into operation in the future.

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High-flux low-divergence positron beam generation from ultra-intense laser irradiated a tapered hollow target

Cited by 20 publications

References 43 publications

High-flux positron generation via the ultra-intense laser irradiating density-modulated plasmas

High-flux positron generation via the ultra-intense laser irradiating density-modulated plasmas

QED effects exploration based on ultra-intensity lasers

Dense pair plasma generation and its modulation dynamics in counter-propagating laser field

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