Laboratory for Laser Energetics, University of Rochester, Rochester, New York 14636, USA.
Phys Rev E. 2017 May;95(5-1):051202. doi: 10.1103/PhysRevE.95.051202. Epub 2017 May 10.
A series of direct-drive implosions performed on OMEGA were used to isolate the effect of an adiabat on the in-flight shell thickness. The maximum in-flight shell thickness was measured to decrease from 75±2 to 60±2μm when the adiabat of the shell was reduced from 6 to 4.5, but when decreasing the adiabat further (1.8), the shell thickness increased to 75±2μm due to the growth of the Rayleigh-Taylor instability. Hydrodynamic simulations suggest that a laser imprint is the dominant seed for these nonuniformities.
在 OMEGA 上进行了一系列直接驱动内爆实验，以隔离绝热效应对飞行中壳层厚度的影响。当壳层的绝热从 6 降低到 4.5 时，测量到的最大飞行中壳层厚度从 75±2μm 减小到 60±2μm，但当进一步降低绝热（1.8）时，由于瑞利-泰勒不稳定性的增长，壳层厚度增加到 75±2μm。流体动力学模拟表明，激光压印是这些非均匀性的主要种子。
