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Charge-neutral, GeV-scale electron-positron pair beams produced using bremsstrahlung gamma rays

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Title
Charge-neutral, GeV-scale electron-positron pair beams produced using bremsstrahlung gamma rays
Author(s)
Youhwan Noh; Jaehyun Song; Mohammad Mirzaie; Calin Ioan Hojbota; Hyeong-il Kim; Seongmin Lee; Junho Won; Hoon Song; Chiwan Song; Chang-Mo Ryu; Chang Hee Nam; Woosuk Bang
Publication Date
2024-01
Journal
Communications Physics, v.7, no.1
Publisher
NATURE PUBLISHING GROUP
Abstract
Matter-antimatter plasmas, such as electron-positron pair plasmas, are frequently observed in various astrophysical phenomena. In laboratory settings, electron-positron pairs have often been generated using high-Z converters irradiated by either direct laser pulses or laser-driven electron beams. Here we generate charge-neutral electron-positron beams with energies in the GeV range, utilizing bremsstrahlung gamma rays. Specifically, intense high-energy gamma rays produced electron-positron pair particles in a lead converter via the Bethe-Heitler process. The produced pair beams exhibited neutrality across all converter thicknesses throughout the energy spectrum spanning from 10 MeV to 1.8 GeV. Pairs with energies surpassing 1 GeV constituted up to 26% of the total kinetic energy within the spectrum. The experimental results were in good agreement with our Geant4 Monte Carlo simulations. These GeV-scale neutral pair particle beams have potential applications for understanding energetic astrophysical phenomena and high-energy particle physics. © 2024, The Author(s).
URI
https://pr.ibs.re.kr/handle/8788114/14923
DOI
10.1038/s42005-024-01527-7
ISSN
2399-3650
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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