10 GeV proton generation driven by 5 PW light spring pulses  

作　　者：Yi Guo Xiaomei Zhang Baifei Shen Toshiki Tajima 

机构地区：[1]Department of Physics,Shanghai Normal University,Shanghai,China [2]Department of Physics and Astronomy,University of California,Irvine,California,USA

出　　处：《High Power Laser Science and Engineering》2024年第6期39-47,共9页高功率激光科学与工程(英文版)

基　　金：supported by the National Natural Science Foundation of China(Nos.12475247,11935008 and 12305274)

摘　　要：Proton acceleration in a near-critical-density gas driven by a light spring(LS) pulse with a helical structure in its intensity profile is investigated using three-dimensional particle-in-cell simulations. Compared with other pulse modes with the same laser power, such as the Gaussian pulse or the donut Laguerre–Gaussian(LG) pulse, the LS structure significantly enhances the peak intensity and drives a stronger longitudinal acceleration field and transverse focusing field. Both the high intensity and helical structure of the LS pulse contribute to the formation of a bubble-like structure with a fine electron column on the axis, which is critical for stable proton acceleration. Therefore, it is very promising to obtain ultra-high-energy protons using LS pulses with a relatively lower power. For example, by using LS pulses with the same power of 4.81 PW, the proton in the gas can be accelerated up to 8.7 Ge V, and the witness proton can be accelerated to10.6 Ge V from 0.11 Ge V, which shows the overwhelming advantage over the Gaussian and LG pulse cases.

关 键 词：10 GeV light spring proton acceleration WAKEFIELD 

分 类 号：O572.341[理学—粒子物理与原子核物理]