Analysis of a Direct-Drive Ignition Capsule Designed for the National Ignition Facility
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چکیده
LLE Review, Volume 84 18
منابع مشابه
The saturn target for polar direct drive on the national ignition facility.
A new target design concept is proposed for direct-drive implosions while the National Ignition Facility is in its initial, indirect-drive configuration. It differs from earlier "polar-direct-drive" designs by adding a low-Z ring around the capsule equator. Refraction in the plasma formed around this ring permits time-dependent tuning of the capsule drive uniformity. An optimized simulation sho...
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68 LLE Review, Volume 86 Introduction The central goal of direct-drive implosions on the OMEGA laser1 is to validate the performance of the high-gain, directdrive ignition designs2 planned for use on the National Ignition Facility. Inferring the density, temperature, and fuel–shell mix of ignition-relevant capsule implosions is important in validating models of implosions. To this end, diagnost...
متن کاملFirst Results from Cryogenic Target Implosions on OMEGA
LLE Review, Volume 90 49 Introduction The base-line direct-drive ignition target design for the National Ignition Facility (NIF)1 is a thick cryogenic DT-ice layer enclosed in a thin CH shell.2,3 In direct-drive inertial confinement fusion (ICF)4 a spherical target is illuminated by a large number of laser beams to provide a spherically symmetric implosion. Target implosions with cryogenic DT f...
متن کاملHigh-Gain Direct-Drive Target Designs for the National Ignition Facility
LLE Review, Volume 88 183 Introduction Direct drive1 offers the potential of higher target gain for the National Ignition Facility (NIF)2 than indirect drive.3 Directdrive targets have been designed that reach a gain of 45 in onedimensional (1-D) simulations using primarily a pure cryogenic DT shell driven on an isentrope where the pressure is three times the Fermi-degenerate pressure (α = 3). ...
متن کاملImproved Performance of High Areal Density Indirect Drive Implosions at the National Ignition Facility using a Four-Shock Adiabat Shaped Drive.
Hydrodynamic instabilities can cause capsule defects and other perturbations to grow and degrade implosion performance in ignition experiments at the National Ignition Facility (NIF). Here, we show the first experimental demonstration that a strong unsupported first shock in indirect drive implosions at the NIF reduces ablation front instability growth leading to a 3 to 10 times higher yield wi...
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