Time-resolved K-shell x-ray spectra of nanosecond laser-produced titanium tracer in gold plasmas  

作　　者：何贞岑 张继彦 杨家敏 闫冰 胡智民 Zhencen He;Jiyan Zhang;Jiamin Yang;Bing Yan;Zhimin Hu(Key Laboratory of Radiation Physics and Technology of Ministry of Education,Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610064,China;Institute of Modern Physics,Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE),Fudan University,Shanghai 200433,China;Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900,China;Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China)

机构地区：[1]Key Laboratory of Radiation Physics and Technology of Ministry of Education,Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610064,China [2]Institute of Modern Physics,Key Laboratory of Nuclear Physics and Ion-Beam Application(MOE),Fudan University,Shanghai 200433,China [3]Laser Fusion Research Center,China Academy of Engineering Physics,Mianyang 621900,China [4]Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China

出　　处：《Chinese Physics B》2023年第1期51-55,共5页中国物理B（英文版）

基　　金：Project supported by the National Key Research and Development Program of China (Grant No.2017YFA0403300);the National Natural Science Foundation of China (Grant Nos.12074352 and 11675158);Fundamental Research Funds for the Central Universities in China (Grant No.YJ202144)。

摘　　要：A study of a nanosecond laser irradiation on the titanium-layer-buried gold planar target is presented. The timeresolved x-ray emission spectra of titanium tracer are measured by a streaked crystal spectrometer. By comparing the simulated spectra obtained by using the FLYCHK code with the measured titanium spectra, the temporal plasma states, i.e.,the electron temperatures and densities, are deduced. To evaluate the feasibility of using the method for the characterization of Au plasma states, the deduced plasma states from the measured titanium spectra are compared with the Multi-1D hydrodynamic simulations of laser-produced Au plasmas. By comparing the measured and simulated results, an overall agreement for the electron temperatures is found, whereas there are deviations in the electron densities. The experiment–theory discrepancy may suggest that the plasma state could not be well reproduced by the Multi-1D hydrodynamic simulation, in which the radial gradient is not taken into account. Further investigations on the spectral characterization and hydrodynamic simulations of the plasma states are needed. All the measured and FLYCHK simulated spectra are given in this paper as datasets. The datasets are openly available at http://www.doi.org/10.57760/sciencedb.j00113.00032.

关 键 词：nanosecond laser irradiation time-resolved x-ray spectra characterization of plasma states Multi-1D hydrodynamic simulations 

分 类 号：O53[理学—等离子体物理] O657.3[理学—物理]