|
|
|
题名
|
作者
|
年代
|
出处
|
被引量
|
| 1 | Acceleration of 60 MeV proton beams in the commissioning experiment of the SULF-10 PW laser显示文摘We report the experimental results of the commissioning phase in the 10 PW laser beamline of the Shanghai Superintense Ultrafast Laser Facility(SULF).The peak power reaches 2.4 PW on target without the last amplifying during the experiment.The laser energy of 72±9 J is directed to a focal spot of approximately 6μm diameter(full width at half maximum)in 30 fs pulse duration,yielding a focused peak intensity around 2.0×10^(21)W/cm^(2).The first laser-proton acceleration experiment is performed using plain copper and plastic targets.High-energy proton beams with maximum cut-off energy up to 62.5 MeV are achieved using copper foils at the optimum target thickness of 4μm via target normal sheath acceleration.For plastic targets of tens of nanometers thick,the proton cut-off energy is approximately 20 MeV,showing ring-like or flamented density distributions.These experimental results reflect the capabilities of the SULF-10 PW beamline,for example,both ultrahigh intensity and relatively good beam contrast.Further optimization for these key parameters is underway,where peak laser intensities of 10^(22)-10^(23)w/cm^(2)are anticipated to support various experiments on extreme field physics. | A.X.Li C.Y.Qin H.Zhang S.Li L.L.Fan Q.S.Wang T.J.Xu N.W.Wang L.H.Yu Y.Xu Y.Q.Liu C.Wang X.L.Wang Z.X.Zhang X.Y.Liu P.L.Bai Z.B.Gan X.B.Zhang X.B.Wang C.Fan Y.J.Sun Y.H.Tang B.Yao X.Y.Liang Y.X.Leng B.F.Shen L.L.Ji R.X.Li Z.Z.Xu | 2022 | High Power Laser Science and Engineering2022，10，4： | 2 |
| 2 | Formation of TiAlSi intermetallics during heating Ti-A356 Al mixed powder compact at semisolid temperature显示文摘Due to the similarity in composition and crystal structure of some Ti Al Si ternary intermetallics,it is quite difficult to accurately confirm their physic characteristics,and thus,to tailor microstructure to improve mechanical properties of metal materials related to the Ti Al Si intermetallics.Therefore,the formation process of Ti Al Si intermetallics was investigated during heating Ti-A356 mixed powder compact at a A356 alloy semisolid temperature of 595℃.The results indicated that two kinds of intermetallics ofτ1(tetragonal,I41/amd)andτ2(orthorhombic,Cmcm)generated,and both the concentration and supply direction of Ti atoms,which are related to local breakage of oxide films on neighboring Ti and A356 alloy powders,determined the phase and morphology of the intermetallics.τ1 andτ2 crystals all had an intrinsic plate morphology,butτ2 crystals were thinner due to more anisotropic growth resulted from their high density of stacking faults(SFs).τ1 lamellar domains generated during growth ofτ2 crystals,which were accompanied by decrease in density of SFs.The combined effect of size difference and internal energy difference betweenτ1 andτ2 crystals made largeτ1 crystals coarsen at the expense ofτ2 crystals in Ostwald ripening,leading them to finally evolve into an agglomerate of largeτ1 plates. | M.Gao T.J.Chen Z.X.Zhang | 2021 | Journal of Materials Science & Technology2021，，35： | 1 |
| 3 | 查看详情显示文摘 | Bai H.W Wen G Huang X.X Han Z.X. Zhong B. Hu Z.X.Zhang X.D | | 0，，5： | 1 |
| 4 | Mapping non-laminar proton acceleration in laser-driven target normal sheath field显示文摘We report on experimental observation of non-laminar proton acceleration modulated by a strong magnetic field in laser irradiating micrometer aluminum targets.The results illustrate the coexistence of ring-like and filamentation structures.We implement the knife edge method into the radiochromic film detector to map the accelerated beams,measuring a source size of 30-110μm for protons of more than 5 MeV.The diagnosis reveals that the ring-like profile originates from low-energy protons far off the axis whereas the filamentation is from the near-axis high-energy protons,exhibiting non-laminar features.Particle-in-cell simulations reproduced the experimental results,showing that the short-term magnetic turbulence via Weibel instability and the long-term quasi-static annular magnetic field by the streaming electric current account for the measured beam profile.Our work provides direct mapping of laser-driven proton sources in the space-energy domain and reveals the non-laminar beam evolution at featured time scales. | C.Y.Qin H.Zhang S.Li S.H.Zhai A.X.Li J.Y.Qian J.Y.Gui F.X.Wu Z.X.Zhang Y.Xu X.Y.Liang Y.X.Leng B.F.Shen L.L.Ji R.X.Li | 2022 | High Power Laser Science and Engineering2022，10，1： | 0 |
您所在的机构暂未开通此部分的功能，请联系管理员