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(1)激光核聚变中的X射线解谱方法。为了求解激光核聚变中的X射线能谱,在SAND迭代基础上提出了一种带有周期性光滑化的限幅迭代解谱方法。这个方法适用于根据亚千电子伏X射线能谱仪、多道K边滤波谱仪和多道滤波-荧光谱仪的测量结果回推靶等离子体X射线能谱。这个方法完全抑制了简单SAND迭代中的数值不稳定性,消除了解谱计算结果中的数值结构,对初始试探谱有很强的适应性,解谱计算结果与初始试探谱无关。(2)二维激光传播和有质动力。为了研究激光二维传播,开发研究了二维激光传播程序HEATER,考虑介质对激光的吸收、衍射和折射效应。经过适当修改,对激光吸收效率和径向轴向有质动力进行了数值研究,得到了较好结果。
(1) X-ray spectroscopy in laser fusion. In order to solve the X-ray energy spectrum in the laser fusion, a periodic smoothing limiting iterative method is proposed based on SAND iteration. This method is suitable for backscattering plasma X-ray spectra based on the measurements of Achilles’ X-ray energy spectrometer, multi-channel K-edge filter spectrometer and multichannel filter-fluorescence spectrometer. This method completely suppresses the numerical instability in the simple SAND iteration, eliminates the numerical structure in the unscrambled spectra and has strong adaptability to the initial probing spectra. The results of the unscented spectroscopy have nothing to do with the initial probing spectra. (2) two-dimensional laser propagation and qualitative momentum. In order to study the laser two-dimensional propagation, a two-dimensional laser propagation program, HEATER, has been developed to study the absorption, diffraction and refraction effects of the medium on the laser. After appropriate modification, the numerical study of the laser absorption efficiency and the radial axial mass-force is carried out, and good results are obtained.