Hicks D G, Spears B K, Braun D G, Olson R E, Sorce C M, Celliers P M, Collins G W, Landen O L
Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Rev Sci Instrum. 2010 Oct;81(10):10E304. doi: 10.1063/1.3475727.
The velocity and remaining ablator mass of an imploding capsule are critical metrics for assessing the progress toward ignition of an inertially confined fusion experiment. These and other ablator rocket parameters have been measured using a single streaked x-ray radiograph. A regularization technique has been used to determine the ablator density profile ρ(r) at each time step; moments of ρ(r) then provide the areal density, average radius, and mass of the unablated, or remaining, ablator material, with the velocity determined from the time derivative of the average radius. The technique has been implemented on experiments at the OMEGA laser facility.
内爆胶囊的速度和剩余烧蚀剂质量是评估惯性约束聚变实验点火进展的关键指标。这些以及其他烧蚀剂火箭参数已通过单次条纹X射线射线照相进行测量。一种正则化技术已被用于在每个时间步确定烧蚀剂密度分布ρ(r)；ρ(r)的矩随后提供未烧蚀或剩余烧蚀剂材料的面密度、平均半径和质量，速度则由平均半径的时间导数确定。该技术已在欧米茄激光设施的实验中得到应用。
