Direct laser acceleration of Bethe-Heitler positrons in laser-channel interactions

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F25%3A00647879" target="_blank" >RIV/61389021:_____/25:00647879 - isvavai.cz</a>

Result on the web

<a href="https://journals.aps.org/pre/abstract/10.1103/PhysRevE.111.035203" target="_blank" >https://journals.aps.org/pre/abstract/10.1103/PhysRevE.111.035203</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1103/PhysRevE.111.035203" target="_blank" >10.1103/PhysRevE.111.035203</a>

Result language

angličtina

Original language name

Direct laser acceleration of Bethe-Heitler positrons in laser-channel interactions

Original language description

Positron creation and acceleration is one of the major challenges for constructing future lepton colliders. On the one hand, conventional technology can provide a solution, but at a prohibitive cost and scale. On the other hand, alternative, reduced-scale ideas for positron beam generation could bring this dream closer to reality. Here we propose a plasma-based positron acceleration method using a powerful laser propagating through a dense and narrow plasma channel. A large amount of electrons are injected within the channel during laser propagation. This electron loading creates static fields in the plasma, enabling positrons to be guided transversely while they directly gain energy from the laser field itself. Within this context, we present a theoretical model to describe how the laser injects the electrons and estimate the beam-loaded effective electron density. We validate our theoretical predictions through quasi-3D Particle-In-Cell (PIC) simulations and demonstrate the robustness of this guiding and direct laser acceleration process for positrons. Our approach could pave the way for testing this positron acceleration scheme at ELI Beamlines, showcasing an unprecedentedly high average energy gain rate of a few GeV/mm. The fireball jet produced contains GeV-level electrons, positrons, and x-rays and thus brings unique opportunities for applications for laboratory astrophysics such as mimicking the propagation of fireball jets from gamma-ray bursts and seeding pair cascades taking place in pulsars with different ratios of electrons and positrons.

Czech name

—

Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

—

OECD FORD branch

10306 - Optics (including laser optics and quantum optics)

Project

—

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2025

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Physical Review E

ISSN

2470-0045

e-ISSN

2470-0053

Volume of the periodical

111

Issue of the periodical within the volume

3

Country of publishing house

US - UNITED STATES

Number of pages

15

Pages from-to

035203

UT code for WoS article

001459102200002

EID of the result in the Scopus database

2-s2.0-86000512003