激光拉曼散射测量ICF靶丸燃料含量

Using laser Raman scattering to measure fuel content in ICF shell

提出了一种基于显微激光拉曼散射的惯性约束聚变塑料靶丸非放射性燃料气体含量的测量方法,该方法克服了过去不能直接对氘气进行非破坏测量的困难,可以显著提高测量效率与精度,通过标定可以方便应用于打靶零时刻的燃料总量监测。由于入射光与散射光都需要透过微球材料,因此,球壳材料性能特点就会对测量结果产生显著影响,针对微球材料的荧光波长、激光波长和功率以及探测系统光栅性能等因素进行了详细考察与讨论,给出了确切测试结果。

A new method for ICF fuel content measuring based on laser Raman scattering is presented, which can directly and non-destructively analyzes deuterium gas content in shells. Since the incident and scattered lights would traverse through the shell wall, therefore the material performance of the shell will greatly affect the measured results. Thus corresponding experiments have been done using a confocal laser Raman microscope, and the factors that will influence the results, such as shells florescence, laser wavelength and power, grating resolution,and system confocal performance, have been investigated, which proves the feasibility of the method.