物理学报2024，Vol.73Issue(16)：171-180,10.DOI:10.7498/aps.73.20240696
基于锥形等离子体通道的百拍瓦激光脉冲整形及重离子加速
Hundreds-petawatt laser pulses shaping and heavy ion acceleration based on conical plasma channels
摘要
Abstract
In this work,the effects of conical plasma channels on the laser pulses shaping and the heavy ion acceleration under the extreme light field conditions of hundreds-petawatt are investigated by using a particle simulation method.The law of influence of the conical plasma channel on the spatio-temporal waveform and intensity of the incident laser is analyzed,when the quantum electrodynamics(QED)effect is taken into account.The reason for the shaping laser-enhanced heavy ion acceleration is given,and the role of the QED effect in the acceleration process is explained. It is found that due to the non-linear interference and focusing effects,the conical plasma channel can shape the spatio-temporal waveform of the laser pulse and enhance the laser intensity.A tightly focused(beam waist radius＜1 μm)and ultra-high intensity(enhanced 6 times)shaping laser is obtained for a linearly polarized laser with an intensity of 5.46×1022 W/cm2 and a waist radius of 10 μm at an incident angle of θ=10°.In the simulation,the conical plasma channel is filled by fully ionized high-Z gold plasma with an electron density up to ne=2626.5nc.Therefore most of the laser energy in the channel is reflected by the channel wall,and the QED effect has less influence on laser focusing and shaping.This laser is used to accelerate an ultra-thin flat target placed at the end of the channel.It is found that the radiation reaction force can effectively suppress the transverse expansion of the ultra-thin flat target,caused by the electron heating and the transverse non-uniform of the laser intensity.The transparency time of the ultra-thin flat target is prolonged,which will allow the gold ions to be fully accelerated.Ultimately,the gold ions can reach up to about 240 GeV in cutoff energy.These results are expected to provide theoretical reference and technical support for designing the future experiments on hundreds-petawatt laser heavy ion acceleration and their applications in high-quality ion source,such as nucleus-nucleus collisions.关键词
百拍瓦激光脉冲/锥形等离子体通道/脉冲整形/重离子加速Key words
hundreds-petwatts laser pulses/conical plasma channel/pulse shaping/heavy ion acceleration引用本文复制引用
赵娜,欧阳建明,邹德滨,张国博,甘龙飞,邵福球..基于锥形等离子体通道的百拍瓦激光脉冲整形及重离子加速[J].物理学报,2024,73(16):171-180,10.基金项目
国家自然科学基金(批准号:12305268,12175310,12075014)、湖南省教育厅科学研究项目(批准号:22B0655,22A0435)、湖南省自然科学基金(批准号:2024JJ6184,2022JJ20042,2023JJ30195)和国防科技大学科研计划(批准号:ZK21-12)资助的课题. Project supported by the National Natural Science Foundation of China(Grant Nos.12305268,12175310,12075014),the Scientific Research Foundation of Education Bureau of Hunan Province,China(Grant Nos.22B0655,22A0435),the Natural Science Foundation of Hunan Province,China(Grant Nos.2024JJ6184,2022JJ20042,2023JJ30195),and the Research Projects of National University of Defense Technology,China(Grant No.ZK21-12). （批准号:12305268,12175310,12075014）
