Accelerated protons with energies up to 70 MeV based on the optimized SG-Ⅱ Peta-watt laser facility  

作　　者：H.H.An W.Wang J.Xiong C.Wang X.Pan X.P.Ouyang S.Jiang Z.Y.Xie P.P.Wang Y.L.Yao N.Hua Y.Wang Z.C.Jiang Q.Xiao F.C.Ding Y.T.Wan X.Liu R.R.Wang Z.H.Fang P.Q.Yang Y.E.Jiang P.Z.Zhang B.Q.Zhu J.R.Sun B.Qiao A.L.Lei J.Q.Zhu 

机构地区：[1]Shanghai Institute of Laser Plasma,China Academy of Engineering Physics,Shanghai,China [2]Shanghai Institute of Optics and Fine Mechanics,Chinese Academy of Sciences,Shanghai,China [3]Center for Applied Physics and Technology,Peking University,Beijing,China [4]National Laboratory on High Power Laser and Physics,Shanghai,China

出　　处：《High Power Laser Science and Engineering》2023年第5期127-136,共10页高功率激光科学与工程（英文版）

基　　金：National Natural Science Foundation of China(Grant No.12075227);the National Natural Science Foundation of China-NSAF(Grant No.U2130121);the National Key Research and Development Program of China(Grant No.2016YFA0401102);the Science Challenge Project(Grant No.TZ2018005).

摘　　要：The target backsheath field acceleration mechanism is one of the main mechanisms of laser-driven proton acceleration(LDPA)and strongly depends on the comprehensive performance of the ultrashort ultra-intense lasers used as the driving sources.The successful use of the SG-II Peta-watt(SG-II PW)laser facility for LDPA and its applications in radiographic diagnoses have been manifested by the good performance of the SG-II PW facility.Recently,the SG-II PW laser facility has undergone extensive maintenance and a comprehensive technical upgrade in terms of the seed source,laser contrast and terminal focus.LDPA experiments were performed using the maintained SG-II PW laser beam,and the highest cutoff energy of the proton beam was obviously increased.Accordingly,a double-film target structure was used,and the maximum cutoff energy of the proton beam was up to 70 MeV.These results demonstrate that the comprehensive performance of the SG-II PW laser facility was improved significantly.

关 键 词：laser-driven proton acceleration SG-II Peta-watt laser target normal sheath acceleration 

分 类 号：TN24[电子电信—物理电子学]