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Bae, Leejin
초강력 레이저과학 연구단
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Nanoparticle-insertion scheme to decouple electron injection from laser evolution in laser wakefield acceleration

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Title
Nanoparticle-insertion scheme to decouple electron injection from laser evolution in laser wakefield acceleration
Author(s)
Xu, Jiancai; Leejin Bae; Mohamed Ezzat; Hyung Taek Kim; Jeong Moon Yang; Sang Hwa Lee; Jin Woo Yoon; Jae Hee Sung; Seong Ku Lee; Ji, Liangliang; Shen, Baifei; Chang Hee Nam
Publication Date
2022-07
Journal
Scientific Reports, v.12, no.1
Publisher
Nature Research
Abstract
© 2022, The Author(s).A localized nanoparticle insertion scheme is developed to decouple electron injection from laser evolution in laser wakefield acceleration. Here we report the experimental realization of a controllable electron injection by the nanoparticle insertion method into a plasma medium, where the injection position is localized within the short range of 100 μm. Nanoparticles were generated by the laser ablation process of a copper blade target using a 3-ns 532-nm laser pulse with fluence above 100 J/cm2. The produced electron bunches with a beam charge above 300 pC and divergence of around 12 mrad show the injection probability over 90% after optimizing the ablation laser energy and the temporal delay between the ablation and the main laser pulses. Since this nanoparticle insertion method can avoid the disturbing effects of electron injection process on laser evolution, the stable high-charge injection method can provide a suitable electron injector for multi-GeV electron sources from low-density plasmas.
URI
https://pr.ibs.re.kr/handle/8788114/12136
DOI
10.1038/s41598-022-15125-6
ISSN
2045-2322
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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