Data Analysis of the Gated-LEH X-Ray Imaging Diagnostic at the NIF

The Gated Laser Entrance Hole (G-LEH) x-ray imaging diagnostic [1, 2] in use at the NIF offers a desirable combination of spatial and temporal resolution. By looking inside of NIF hohlraums with time resolution, G-LEH measures target features including LEH size and capsule size. A framework is presented for automated and systematic analysis of G-LEH images that measures several physical parameters of interest and their evolution over time. The results from these analyses enable comparisons with hohlraum models and allow model validation of LEH closure velocity and the extent of capsule blow-off. \\ 1 H. Chen, N. Palmer, M. Dayton et al., Rev. Sci. Instrum. 87, 11E203 (2016) \\ 2 L. Claus, L. Fang, R. Kay et al., Proc. SPIE 9591, 95910 (2015).