ICF实验软X射线能谱仪对辐射能流时间关联测量的时标系统  

Fiducial system for the diagnosis of temporal evolution of radiation fluxes with soft-X-ray spectrometer in inertial confinement fusion experiments

作　　者：宋天明[1] 易荣清[1] 崔延莉[1] 于瑞珍[1] 杨家敏[1] 朱托[1] 侯立飞[1] 杜华冰[1] 

机构地区：[1]中国工程物理研究院激光聚变研究中心,绵阳621900

出　　处：《物理学报》2012年第7期321-325,共5页Acta Physica Sinica

摘　　要：介绍了时标系统的构成、原理和数据处理方法,并对时间关联的不确定度进行了分析.该时标系统成功将软X射线能谱仪自身多个探测通道的信号以及三台不同位置处的谱仪的时间信号关联起来,关联精度约为70ps.在神光Ⅲ原型激光装置上进行的实验中用软X射线能谱仪从不同方向测得辐射源和辐射输运管末端口辐射能流随时间的演化曲线,反映了输运管内热波沿轴向传输以及软X射线辐射流衰减的物理过程.In inertial confinement fusion experiments,a fiducial system is established in order to correlate the signals from different channels of one spectrometer and the signals from different spectrometers to obtain time-related experimental data.The constitution,the principle and the data processing method,together with the uncertainty analysis are introduced.Signals from different channels and from three spectrometers diagnosing from different directions are correlated with an uncertainty of 70 ps.The time-related historical radiation fluxes from a cylinder target,measured from three different directions,are obtained in the experiments on Shenguang II prototype laser facility,offering the physical information about the heat wave propagation along the axis of the cylinder and the attenuation of soft X-ray radiation flux.

关 键 词：惯性约束聚变 辐射能流 时标系统 绝对时间关联 

分 类 号：O434.1[机械工程—光学工程]