Assessment of radiography for diagnosing short wavelength instability growth and mix in NIF ignition capsules.
- Lawrence Livermore National Laboratory
Understanding and controlling hydrodynamic instabilities is critical to achieving ignition at National Ignition Facility (NIF). High resolution x-ray radiography of a NIF capsule may be able to measure key aspects of short wavelength instability growth including time dependent areal density variations, the dominant wavelength of growth, amount of growth from isolated capsule defects on the ablator and ice surfaces, and growth of perturbations as a result of the fill tube or dust contaminants. Radiography of the capsule limb may also place constraints on the width of the ice/ablator mix layer. Measurement of these various observables are important to determine what effect target design changes has on instability growth and to validate code predictions. We present an analysis of 2D and 3D HYDRA simulations and demonstrate how radiography can be used to diagnose signatures of mix in NIC capsules.
- Research Organization:
- Sandia National Laboratories (SNL), Albuquerque, NM, and Livermore, CA (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 1038203
- Report Number(s):
- SAND2010-8866C; TRN: US1201820
- Resource Relation:
- Conference: Proposed for presentation at the 52nd Annual Meeting of the APS Division of Plasma Physics held November 8-12, 2010 in Chicago, IL.
- Country of Publication:
- United States
- Language:
- English
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