Golovkin I, Mancini R, Louis S, Ochi Y, Fujita K, Nishimura H, Shirga H, Miyanaga N, Azechi H, Butzbach R, Uschmann I, Förster E, Delettrez J, Koch J, Lee R W, Klein L
Department of Physics, University of Nevada, Reno, Nevada 89557, USA.
Phys Rev Lett. 2002 Jan 28;88(4):045002. doi: 10.1103/PhysRevLett.88.045002. Epub 2002 Jan 10.
The time-dependent gradient structure of a laser-compressed, high-energy-density plasma has been determined using a method based on the simultaneous analysis of time-resolved x-ray monochromatic images and x-ray line spectra from Ar-doped D2 implosion cores. The analysis self-consistently determines the temperature and density gradients that yield the best fits to the spatial-emissivity profiles and spectral line shapes. This measurement is important for understanding the spectra formation and plasma dynamics associated with the implosion process. In addition, since the results are independent of hydrodynamic simulations, they are also important for comparison with fluid-dynamic models.
利用一种基于同时分析时间分辨的X射线单色图像和来自掺氩D2内爆核心的X射线线谱的方法，确定了激光压缩的高能量密度等离子体的时间相关梯度结构。该分析自洽地确定了能使空间发射率分布和谱线形状达到最佳拟合的温度和密度梯度。这种测量对于理解与内爆过程相关的光谱形成和等离子体动力学非常重要。此外，由于结果与流体动力学模拟无关，它们对于与流体动力学模型进行比较也很重要。
