KCl晶体瞬态辐射谱时间分辨多道测量研究  

Investigations of Transient Time-Dependent Spectral Multi-Channel Measurement for Shocked KCl Crystal

作　　者：程娟[1] 贺应红[1] 左浩毅[1] 冉瑞江[1] 薛康[1] 杨经国[1] 谭华[2] 胡绍楼[2] 汪小松[2] 

机构地区：[1]四川大学物理系,四川成都610064 [2]中国工程物理研究院流体物理研究所,冲击波物理和爆轰物理国防科技重点实验室,四川绵阳621900

出　　处：《光谱学与光谱分析》2004年第12期1499-1501,共3页Spectroscopy and Spectral Analysis

基　　金：国家自然科学基金 (60 0 780 2 0 ) ;国防科技重点实验室基金 (0 0JS75 3 1 JW 1 90 6)资助项目

摘　　要：报道了采用多通道光纤延迟和光学多道分析技术采集KCl晶体瞬态冲击辐射时间分辨光谱的新方法。多光纤延时耦合器由 5条长度不等的光纤组成 ,光纤长度差决定延时时差 ,光纤出射光由透镜耦合进入多色仪 ,经色散后在面阵探测器上形成与信号光纤一一对应的光谱图形 ,经计算机处理获得该信号光的空间 时间分辨光谱。建立了实验装置 ,实现了KCl晶体冲击辐射谱时间分辨多道测量 ,时间分辨率达到 2 0ns,谱强度分辨率 1/ 18bit。In this paper, the authors reported a new method for measuring transient time-dependent spectra using multi-fiber delay coupler and optical multi-channel analysis technique. The fiber delay coupler consists of five fibers with different lengths and its time-delay between two fibers is determined by the different fiber lengths. The light beams that came from the fiber coupler were coupled by a lens system into the slit of a spectrograph and formed a spectral pattern on the focus plane of the spectrometer. A two-dimensional CCD detector convested the optical pattern into an electrical pattern, and then the transient time-dependent spectra were obtained by a personal computer. The experimental setup was constructed, and the transient time-dependent spectra were measured for KCl crystal shocked by a high speed pill. The time resolution was 20 ns, and the spectral intensity resolution reached 1/18 bit.

关 键 词：晶体 时间分辨 辐射谱 一一对应 光纤延时 光谱 光学 信号光 多色 面阵探测器 

分 类 号：O572[理学—粒子物理与原子核物理] TN92[理学—物理]