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Ultrafast two-dimensional x-ray imager with temporal fiducial pulses for laser-produced plasmas

Chinese Physics B 2023年第11期32卷 214-219页

作者：刘正东仲佳勇远晓辉张雅芃姚嘉文马作霖徐向晏薛彦华张喆袁大伟张敏睿李炳均谷昊琛戴羽张成龙董玉峰周鹏马鑫杰马云峰白雪洁刘高扬田进寿赵刚张杰 Department of Astronomy Beijing Normal UniversityBeijing 100875China Institute for Frontiers in Astronomy and Astrophysics Beijing Normal UniversityBeijing 102206China Xi’an Institute of Optics and Precision Mechanics Chinese Academy of SciencesXi’an 710119China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China Key Laboratory for Laser Plasmas(MoE)and School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China Collaborative Innovation Center of IFSA(CICIFSA) Shanghai Jiao Tong UniversityShanghai 200240China Key Laboratory of Optical Astronomy National Astronomical ObservatoriesChinese Academy of SciencesBeijing 100101China State Key Laboratory for Geomechanics and Deep Underground Engineering China University of Mining and TechnologyBeijing 100083China School of Nuclear Science and Technology Xi’an Jiaotong UniversityXi’an 710049China School of Sciences Harbin Institute of Technology at WeihaiWeihai 264209China Songshan Lake Materials Laboratory Guangdong 523808China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100049China

It is challenging to make an ultrafast diagnosis of the temporal evolution of small and short-lived plasma in two dimensions. To overcome this difficulty, we have developed a well-timed diagnostic utilizing an x-ray streak camera equipped with a row of multi-pinhole arrays. By processing multiple sets of one-dimensional streaked image data acquired from various pinholes, we are capable of reconstructing high-resolution two-dimensional images with a temporal resolution of 38 ps and a spatial resolution of 18 μm. The temporal fiducial pulses accessed from external sources can advance the precise timing and accurately determine the arrival time of the laser. Moreover, it can correct the nonlinear sweeping speed of the streak camera. The effectiveness of this diagnostic has been successfully verified at the Shenguang-II laser facility,providing an indispensable tool for observing complex physical phenomena, such as the implosion process of laser-fusion experiments.

关键词： ultrafast diagnosis double-cone ignition x-ray streak camera pinhole array temporal fiducial pulses

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