High-resolution 17-75 keV backlighters for high energy density experiments
High-resolution 17-75 keV backlighters for high energy density experiments
复制标题
DOI：
10.1063/1.2957918
复制
发表时间：
2008-07
影响因子：
2.2
通讯作者：
H. Park;B. Maddox;E. Giraldez;S. Hatchett;L. Hudson;N. Izumi;M. Key;S. L. Pape;A. Mackinnon-
中科院分区：
文献类型：
--
作者：
H. Park;B. Maddox;E. Giraldez;S. Hatchett;L. Hudson;N. Izumi;M. Key;S. L. Pape;A. Mackinnon-
我们已经开发了17keV到75keV的一维和二维高分辨率(10{sup 17}W/cm{sup 2})。我们已经实现了使用附着在低Z衬底材料上的微箔和微线靶的高分辨率点投影一维和二维射线照相。在300{Micro}m x 300{Micro}m x 300{Micro}m x 5{Micro}m CH衬底上，微线尺寸为10{Micro}m x 10{Micro}m x 300{Micro}m。在LLNL使用泰坦激光器演示了射线照相性能。我们观察到，分辨率由微线靶的尺寸决定，等离子体羽流的退化很小，这意味着高能X射线光子主要在微线体积内产生。我们还观察到，在300J，1-40ps的脉冲激光作用下，这些小体积靶产生了足够的K{α}光子，并且信噪比足够高，可以用于单发射线照相实验。这项独特的技术将用于未来欧米茄-EP、ZR和NIF设施的高能量密度(HED)实验。
We have developed 17 keV to 75 keV 1-dimensional and 2-dimensional high-resolution ( 10{sup 17} W/cm{sup 2}. We have achieved high resolution point projection 1-dimensional and 2-dimensional radiography using micro-foil and micro-wire targets attached to low-Z substrate materials. The micro-wire size was 10 {micro}m x 10 {micro}m x 300 {micro}m on a 300 {micro}m x 300 {micro}m x 5 {micro}m CH substrate. The radiography performance was demonstrated using the Titan laser at LLNL. We observed that the resolution is dominated by the micro-wire target size and there is very little degradation from the plasma plume, implying that the high energy x-ray photons are generated mostly within the micro-wire volume. We also observe that there are enough K{alpha} photons created with a 300 J, 1-{omega}, 40 ps pulse laser from these small volume targets, and that the signal-to-noise ratio is sufficiently high, for single shot radiography experiments. This unique technique will be used on future high energy density (HED) experiments at the new Omega-EP, ZR and NIF facilities.