Dynamics of Laser Imploded core observed with Ultra-fast X-Ray Imaging

用超快 X 射线成像观察激光内爆核心的动力学

• 批准号: 08458135
• 负责人: SHIRAGA Hiroyuki
• 金额: $ 3.26万
• 依托单位: Osaka University
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B)
• 财政年份: 1996
• 资助国家: 日本
• 起止时间: 1996 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-08458135/
• 关键词: Ultra-fast X-Ray Imaging; Multi-Image X-Ray Streak Camera; Sampling-Image X-Ray Streak Camera; Image Sampling; Implosion Dynamics; Imploded core; Hot Spark; Laser Fusion; 爆縮コアダイナミクス

Novel diagnostic technique for observing dynamics of the laser-imploded core plasmas with a temporal resolution better than 10 ps was developed by using a image-sampling procedure applied to an x-ray streak camera, which is called MIXS (Multi-Imaging X-Ray Streak Camera). It is the most fast two-dimensional x-ray imaging technique ever made. Further development of the MIXS,such as spectrally resolved MIXS as well as two-dimensional sampling technique, were achieved.The MIXS system was introduce to the target implosion experiments at Gekko-XII laser facility, and its time-resolved core dynamics of the imploded target was directly observed for the first time. From the comparison of the observed images with 1D- and 2D-simulations, it was found that the heating of the central spark of the core is terminated during the stagnation phase.

发展了一种用于X射线条纹相机(MIXS)的时间分辨率优于10ps的激光内爆等离子体动力学诊断新技术。这是有史以来最快的二维X射线成像技术。将MIXS系统引入壁虎XII激光装置的靶内爆实验中，首次直接观测到了靶内爆的时间分辨核心动力学。从观测图像与一维和二维模拟的比较中发现，堆芯中心火花的加热在停滞阶段终止。

项目成果

M.Heya: "Time-Resolved, Two-Dimensional Electron-Temperature Distribution of Laser-Imploded Core" Review of Scientific Instruments. vol.68, No.1. 820-823 (1997)

M.Heya：“激光内爆核心的时间分辨二维电子温度分布”科学仪器评论。

H.Shiraga: "Ultra-Fast 2-Dimensional X-Ray Imaging with a 10-ps Resolution for Use in Laser Fusion Research" Journal of Electron Spectroscopy and Related Phenomena. vol.80. 287-290 (1996)

H.Shiraga：“用于激光聚变研究的具有 10-ps 分辨率的超快二维 X 射线成像”《电子能谱和相关现象杂志》。

H.Azechi: "Review of ICF Plasma Diaghostics" Fusion Engineering and Design. 34-35. 37-44 (1997)

H.Azechi：“ICF 等离子体诊断学回顾”聚变工程与设计。

H.Shiraga: "1-D and 2-D Fast X-Ray Imaging of Laser-Driven Implosion Dynamics with X-Ray Streak Cameras" Review of Scientific Instruments. 68(1). 828-830 (1997)

H.Shiraga：“使用 X 射线条纹相机对激光驱动内爆动力学进行一维和二维快速 X 射线成像”科学仪器评论。

H.Azechi: "Review of ICF Plasma Diagnostics" Fusion Engineering and Design. 34-35. 37-44 (1997)

H.Azechi：“ICF 等离子体诊断综述”融合工程与设计。