【摘要】 在“星光Ⅱ”激光装置上进行了X射线辐射输运分解实验研究.实验中利用高时空分辨的MCP选通X射线皮秒分幅相机和软X射线条纹相机从缝口观测腔内壁X射线辐射时空分布,得到X射线在腔中的输运速率、X射线持续发射时间和轴向强度衰减量;利用X射线CCD针孔透射光栅谱仪观测到腔内X射线辐射光谱随空间位置的变化,得到X射线在输运过程中被多次吸收和发射后谱的变化特征;用X射线二极管和亚千X射线能谱仪分别得到源和输运末端X射线辐射总量和辐射温度.介绍了实验中采用的诊断技术和实验方法,并给出了获得的典型结果.更多还原

【Abstract】 On the Xingguang\|Ⅱ facility,X\|ray transport process in a cavity target was simulated in a long cylindrical cavity with slits. High temporally and spatially resolved microchannel plate (MCP) gated X\|ray picosecond frame camera and soft X\|ray steak camera were used to investigate the temporal and spatial distribution of the soft X\|rays emitted from the cavity wall through the slit. X\|ray transport velocity, X\|ray emission time and the amount of intensity decay were obtained. X\|ray CCD pinhole transmission grating spectrometer was used to investigate the spectrum change of the emitted X\|rays versus its location. The variation characteristic of the spectrum of X\|rays absorbed and emitted again and again in transport was obtained. X\|ray diodes and Dante spectrometer were used to measure X\|ray flux and radiation temperature in the slit, the source and the transport end. The typical results in the experiment were given. About the results, simple and essential analysis and discussions were made.更多还原