Optimization of positrons generation based on laser wakefield electron acceleration

Wu, Yuchi; Han, Dingan; Zhang, Tiankui; Dong, Keyan; Zhu, B.; Yan, Yue; Gu, Yuqiu

doi:10.1103/physrevaccelbeams.19.081303

Cited by 3 publications

(3 citation statements)

References 45 publications

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“…A positron beam was generated from the interaction of the electron beam with a secondary Pb converter of variable thickness. The maximum measured positron yield was ∼ 1 × 10 8 e + /shot, obtained from a converter thickness of d = 1 cm, which corresponds to a thickness of two radiation lengths (L Pb rad ≃ 0.5 cm), as expected for the Bethe-Heitler process, and confirmed numerically and theoretically by Wu et al [103].…”

Section: Referencessupporting

confidence: 78%

“…Despite the large positron yield and properties of those beams, interesting for applications in material science, their properties need further improvement before being used in fields such as high energy physics and colliders. For this reason, the properties of positron beams expected from the upcoming multi-PW laser facilities have been numerically studied [102,103]. Considering the multi-GeV electron beams expected from these facilities, Alejo et al have shown that ultra-short positron beams can be used as injector for a future multi-stage, plasma-based positron accelerator [102] (see Table 1).…”

Section: Prospectsmentioning

confidence: 99%

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Laser-Wakefield Electron Beams as Drivers of High-Quality Positron Beams and Inverse-Compton-Scattered Photon Beams

et al. 2019

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The fast-paced development of laser-wakefield electron acceleration has recently culminated in the generation of electron beams with extreme characteristics, including femtosecond-scale duration, mrad divergence, and high-energy. It is now customary to attain tens to hundreds of pC of charge with an energy of hundreds of MeV per particle with small-scale commercial laser systems, with multi-GeV electron beams being demonstrated from cm-scale accelerators. The interaction of such electron beams with either a solid target or the focus of a second high-power laser can result in the generation of high-quality positron beams and MeV-photon beams. The unrivaled properties of these secondary sources make them ideal for both fundamental and practical applications. In the present article, some of their main characteristics will be discussed, with particular emphasis on their potential applications in fundamental and applied physics. A discussion of potential future developments enabled by near-term laser facilities will also be presented.

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Section: Referencessupporting

confidence: 78%

Section: Prospectsmentioning

confidence: 99%

Laser-Wakefield Electron Beams as Drivers of High-Quality Positron Beams and Inverse-Compton-Scattered Photon Beams

et al. 2019

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“…Development of laser-matter interactions and ensuing new phenomena, have resulted in more extensive research in this field, and the research on the laser-matter interaction is more and more extensive. The coupling between QED process and plasma dynamics in QED plasma produced by relativistic ultra-intense laser is a nonlinear and complex process, for example, the generation of ultra-intense γ-rays, and high energy dense electron-positron pairs [28][29][30][31][32][33][34][35]. Numerical simulation is an important method describing such interactions.…”

Section: Introductionmentioning

confidence: 99%

Dense positrons and γ-rays generation by lasers interacting with convex target

Yasen¹,

Xie²,

Liu³

2020

Plasma Sci. Technol.

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We use quantum electrodynamics particle-in-cell simulation to study the generation of dense electron–positron plasma and strong γ-ray bursts in counter-propagating laser beam interactions with two different solid targets, i.e. planar (type I) and convex (type II). We find that type II limits fast electron flow most effectively. while the photon density is increased by about an order of magnitude and energy by approx. 10%–20% compared with those in type I target. γ-photon source with an ultrahigh peak brilliance of 2 × 1025 photons/s/mm2/mrad2/0.1% BW is generated by nonlinear Compton scattering process. Furthermore, use of type II target increases the positron density and energy by 3 times and 32% respectively, compared with those in type I target. In addition, the conversion efficiencies of total laser energy to γ-rays and positrons of type II are improved by 13.2% and 9.86% compared with type I. Such improvements in conversion efficiency and positron density are envisaged to have practical applications in experimental field.

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The New Energy Material with Great Potential Positron

Wang

et al. 2021

J. Phys.: Conf. Ser.

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Positron has attracted much attention in particle research for it was the first antiparticle discovered. Due to its extreme instability, positron is easy to annihilate with electron and release photons or form unstable positronium. Positron releases 1000 times more energy than nuclear fission of the same mass with no radioactive substance. As a new energy source, positron has more potential than other energy sources. With the rapid development of technology, the problem of how-to storage positron is solved gradually which makes a good foundation for annihilation of positron and electron beams. In this paper, the energy released by collision between electron and positron beams is deduced by theoretical analysis, based on the latest experimental results. The positron beam is the same energy of 10 MeV as the electron beam, which is adopt. After the pulses cross each other, the energy released is closed to 15mJ with current intensity 1020e+/s. The energy difference of different radius of pulses is studied. This work has great potential value in further research.

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Optimization of positrons generation based on laser wakefield electron acceleration

Cited by 3 publications

References 45 publications

Laser-Wakefield Electron Beams as Drivers of High-Quality Positron Beams and Inverse-Compton-Scattered Photon Beams

Laser-Wakefield Electron Beams as Drivers of High-Quality Positron Beams and Inverse-Compton-Scattered Photon Beams

Dense positrons and γ-rays generation by lasers interacting with convex target

The New Energy Material with Great Potential Positron

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