Images of the gold bubble feature in NIF Gas-Filled Ignition Hohlraums

[摘要] The ViewFactor experiments at the National Ignition Facility use a truncated hohlraum to allow excellent diagnostic views of the interior of the hohlraum. Time-integrated, hard x-ray (3-5 keV) images show the region where the laser deposits its energy at peak power. These images show a three-dimensional structure in the region where the outer beams deposit their energy (the "gold bubble") which varies with pulse shape and cross beam energy transfer. The images from two-dimensional simulations have similar trends but show some discrepancies.

[发布机构] Lawrence Livermore National Laboratory, P.O. Box 808, Livermore; CA; 94550, United States^1;Atomic Weapons Establishment, Aldermaston, Reading; RG7 4PR, United Kingdom^2

[关键词] Cross beams;Hard X ray;Hohlraums;Ignition hohlraums;National ignition facility;Peak power;Three-dimensional structure;Two-dimensional simulations