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Electron-positron generation by irradiating various metallic materials with laser-accelerated electrons

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Title
Electron-positron generation by irradiating various metallic materials with laser-accelerated electrons
Author(s)
Hyeong-il Kim; Youhwan Noh; Jaehyun Song; Seongmin Lee; Junho Won; Chiwan Song; Bae, Leejin; Ryu, Chang-Mo; Chang Hee Nam; Woosuk Bang
Publication Date
2024-02
Journal
Results in Physics, v.57
Publisher
Elsevier B.V.
Abstract
We examined electron–positron pair production in solid iron, zinc, tungsten, and lead targets irradiated by a laser-accelerated electron beam generated with a 100 TW laser. These targets were assessed at the target thickness of 0.5, 1.25, and 2.0 radiation lengths for each material. Using a 0.75-T-magnetic spectrometer, we measured the electron and positron yields and spectra, producing 3 × 108 positrons per shot with a peak leptonic density of 4 × 1012 cm−3. These experimental results agree very well with Monte Carlo simulations conducted with the simulation code Geant4. Importantly, our findings show that normalizing the target thickness to each material's radiation length results in consistent electron and positron yields across the materials, effectively reducing discrepancies due to material differences. © 2023 The Author(s)
URI
https://pr.ibs.re.kr/handle/8788114/14732
DOI
10.1016/j.rinp.2023.107310
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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