Measurements of direct drive laser imprint in thin foils by radiography using an x-ray laser backlighter
Measurements of direct drive laser imprint in thin foils by radiography using an x-ray laser backlighter
复制标题
使用 X 射线激光背光源通过射线照相测量薄箔上的直接驱动激光压印
DOI：
10.1063/1.872340
复制
发表时间：
1997
影响因子：
2.2
通讯作者：
J. Knauer
中科院分区：
文献类型：
--
作者：
D. Kalantar;M. Key;L. D. Silva;S. Glendinning;B. Remington;J. Rothenberg;F. Weber;S. Weber;E. Wolfrum;N. Kim;D. Neely;J. Zhang;J. Wark;A. Demir;Jiunn;Raymond F. Smith;G. Tallents;C. Lewis;A. MacPhee;J. Warwick;J. Knauer
在直接驱动惯性约束核聚变中，光束平滑后残留的散斑图样在烧蚀前沿的不稳定性播种中起着重要的作用。我们已经使用了X射线激光器作为XUV背光来表征薄箔中的压印调制，用于在0.35 pm和0.53 pm照射下通过随机相位板和光谱色散进行平滑，并在0.53 pm照射下诱导空间不相干性。我们还演示了测量的调制，由于一个单一的模式产生的光学压印窄缝干涉图案，和修改的压印与叠加的平滑照射研究压印过程的时间依赖性。参考文献8，10无花果。
In direct drive inertial confinement fusion, the residual speckle pattern remaining after beam smoothing plays an important role in the seeding of instabilities at the ablation front. We have used an x-ray laser as an XUV backlighter to characterize the imprinted modulation in thin foils for smoothing by random phase plate and spectral dispersion at both 0.35 pm and 0.53 pm irradiation, and induced spatial incoherence at 0.53 pm irradiation. We also demonstrate measurements of the modulation due to a single mode optical imprint generated by a narrow slit interference pattern, and modification of the imprint with a superposed smooth irradiation to study time dependence of the imprinting process. 8 refs., 10 figs.