Development of a multifunctional optical diagnostic system at the Shenguang-Ⅱ upgrade laser facility  

作　　者：Xinyan Li Peng Yuan Fan Gao Yifan Liu Lixuan Wu Xiaohui Yuan Zhe Zhang Jie Zhang Jun Li Jian Zheng 

机构地区：[1]Department of Plasma Physics and Fusion Engineering,University of Science and Technology of China,Hefei,China [2]Key Laboratory for Laser Plasmas(MoE)and School of Physics and Astronomy,Shanghai Jiao Tong University,Shanghai,China [3]Beijing National Laboratory for Condensed Matter Physics,Institute of Physics,Chinese Academy of Sciences,Beijing,China [4]Songshan Lake Materials Laboratory,Dongguan,China [5]Collaborative Innovation Center of IFSA(CICIFSA),Shanghai Jiao Tong University,Shanghai,China [6]Present address:Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai,China

出　　处：《High Power Laser Science and Engineering》2024年第6期87-96,共10页高功率激光科学与工程(英文版)

基　　金：supported by the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDA25010200);the National Key R&D Program of China(No.2023YFA160005602);the National Natural Science Foundation of China(No.12375242)

摘　　要：A multifunctional optical diagnostic system,which includes an interferometer,a refractometer and a multi-frame shadowgraph,has been developed at the Shenguang-II upgrade laser facility to characterize underdense plasmas in experiments of the double-cone ignition scheme of inertial confinement fusion.The system employs a 266 nm laser as the probe to minimize the refraction effect and allows for flexible switching among three modes of the interferometer,refractometer and multi-frame shadowgraph.The multifunctional module comprises a pair of beam splitters that attenuate the laser,shield stray light and configure the multi-frame and interferometric modules.By adjusting the distance and angle between the beam splitters,the system can be easily adjusted and switched between the modes.Diagnostic results demonstrate that the interferometer can reconstruct electron density below 10^(19)cm^(–3),while the refractometer can diagnose density approximately up to 10^(20)cm^(–3).The multi-frame shadowgraph is used to qualitatively characterize the temporal evolution of plasmas in the cases in which the interferometer and refractometer become ineffective.

关 键 词：interferometer multi-frame shadowgraph optical diagnostic system REFRACTOMETER 

分 类 号：TL632[核科学技术—核技术及应用] TN24[电子电信—物理电子学]