General features of experiments on the dynamics of laser-driven electron–positron beams

Warwick, J.; Alejo, A.; Dzelzainis, T.; Schumaker, W.; Doria, D.; Romagnani, L.; Põder, Kristjan; Cole, J. M.; Yeung, M.; Krushelnick, K.; Mangles, S. P. D.; Najmudin, Z.; Samarin, G. M.; Symes, D. R.; Thomas, Alexander; Borghesi, M.; Sarri, Gianluca

doi:10.1016/j.nima.2018.02.054

Cited by 4 publications

(3 citation statements)

References 40 publications

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“…The applicability of LWFA-driven positrons to advanced accelerator concepts is currently subject of investigation, and our recent work [3,4,6], together with that of independent groups [7,8], confirms that there is significant potential in this area. We have also confirmed that such positron beams can be used for some specific studies in laboratory astrophysics, and we have already experimentally measured plasmalike behavior of LWFAdriven electron-positron beams [9][10][11][12]. .…”

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confidence: 66%

Sarri et al. Reply:

et al. 2020

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Sarri et al. Reply: The Comment [1] reports on independent numerical simulations of the experimental results in Ref. [2]. Positron yields and spectra similar to those in Ref. [2] are numerically obtained, but with a larger divergence. A larger positron source size at the rear of the converter is hence inferred, resulting in a smaller positron density. Since the publication of the Letter, comprehensive Monte Carlo simulations of the characteristics of such positron beams have already been published by members of our collaboration [3]. The simulations discussed in the Comment are only a specific subset of this more extensive work, and largely agree with it on the divergence.

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confidence: 66%

Sarri et al. Reply:

et al. 2020

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“…The first observation of collective behavior of an electronpositron plasma has been recently reported by Warwick et al [110] and Warwick et al [111]. In this work, a neutral electron-positron beam was propagated through a low-density background plasma, resulting in the growth of a current-driven instability and the generation of strong magnetic fields (≥ 1 T).…”

Section: Prospectsmentioning

confidence: 84%

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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“…Some progress on overcoming these challenges has recently been achieved [17][18][19][20][21][22][23][24][25][26][27][28] (see also [29] and references cited therein). Experiments [30,31] also demonstrated that the electron beams used for positron production in conventional accelerators can be substituted by electron beams produced in a laser-plasma accelerator (LPA).…”

Section: Introductionmentioning

confidence: 99%

Design study for a compact, two-stage, laser-plasma-based source of positron beams

Amorim

Benedetti

Bulanov

et al. 2023

Plasma Phys. Control. Fusion

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Owing to their large accelerating gradients, plasma-based accelerators have attracted considerable interest as potential drivers for future, compact electron-positron colliders. Despite great progress achieved in plasma-based electron acceleration, positron acceleration still remains a challenging task, with an efficient positron source being the prerequisite for such acceleration. Here a concept for a compact, two-stage plasma-based positron source is discussed. In the first stage the positrons are created by a multi-GeV electron beam produced by a laser-plasma accelerator interacting with a solid density foil. In the second stage the positrons are captured and accelerated in a plasma wave driven by either an electron beam or a laser pulse. Three potential configurations of such a source are considered: (i) A single electron beam is used for both the creation of positrons in the foil and for driving the wakefield in the second stage; (ii) A train of two electron beams is used: the positrons produced by the trailing beam in the foil are captured and accelerated in the second stage by the plasma wave generated by the leading beam; and (iii) A single electron beam is used to produce positrons in the foil and an independent laser pulse is coupled to the second stage to drive the plasma wave. These three configurations show different degrees of effectiveness with positron capture efficiency, varying from less than a percent to almost half of all produced positrons.

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General features of experiments on the dynamics of laser-driven electron–positron beams

Cited by 4 publications

References 40 publications

Sarri et al. Reply:

Sarri et al. Reply:

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

Design study for a compact, two-stage, laser-plasma-based source of positron beams

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