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Energetic laser-driven proton beams from near-critical-density double-layer targets under moderate relativistic intensities

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Title
Energetic laser-driven proton beams from near-critical-density double-layer targets under moderate relativistic intensities
Author(s)
Mei, Zhusong; Pan, Zhuo; Liu, Zhipeng; Xu, Shirui; Yinren Shou; Wang, Pengjie; Cao, Zhengxuan; Kong, Defeng; Liang, Yulan; Peng, Ziyang; Song, Tan; Chen, Xun; Xu, Tianqi; Gao, Ying; Chen, Shiyou; Zhao, Jiarui; Zhao, Yanying; Yan, Xueqing; Ma, Wenjun
Publication Date
2023-03
Journal
PHYSICS OF PLASMAS, v.30, no.3
Publisher
AIP Publishing
Abstract
Double-layer targets composed of near-critical-density carbon nanotube foams (CNFs) and solid foils have shown their advantages in laser-driven ion acceleration under high relativistic intensity. Here, we report the experimental and numerical results on the laser-accelerated proton beams from such targets under moderate relativistic intensities I -5 x 1019W/cm2. 40-TW femtosecond laser pulses were used to irradiate CNF-based double-layer targets. Compared to single-layer targets, significant enhancements on the cutoff energy and numbers of ions were observed. It was found that the CNF layer also leads to a larger divergence angle and a more homogeneous spatial distribution pro -file of the proton beam. Particle-in-cell simulations reveal the reason for the enhanced proton acceleration. It is found that the lateral electric field and the strong magnetic field built by the directly accelerated electrons from the CNF layer contribute to the enlarged divergence angle.
URI
https://pr.ibs.re.kr/handle/8788114/14147
DOI
10.1063/5.0138881
ISSN
1070-664X
Appears in Collections:
Center for Relativistic Laser Science(초강력 레이저과학 연구단) > 1. Journal Papers (저널논문)
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