Rayleigh-Taylor Growth Measurements in the Acceleration Phase of Spherical Implosions on OMEGA

Journal Article · Fri Sep 04 04:00:00 EDT 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.103.105001· OSTI ID:21364672

Smalyuk, V A; Hu, S X; Hager, J D; Delettrez, J A; Meyerhofer, D D; Sangster, T C; Shvarts, D ^[1]

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1. Laboratory for Laser Energetics, University of Rochester, 250 East River Road, Rochester, New York 14623 (United States)

The Rayleigh-Taylor (RT) growth of 3D broadband nonuniformities was measured using x-ray radiography in spherical plastic shells accelerated by laser light at an intensity of approx2x10{sup 14} W/cm{sup 2}. The 20- and 24-mum-thick spherical shells were imploded with 54 beams on the OMEGA laser system. The shells contained diagnostic openings for backlighter x rays used to image shell modulations. The measured shell trajectories and modulation RT growth were in fair agreement with 2D hydro simulations during the acceleration phase of the implosions with convergence ratios of up to approx2.2. Since the ignition designs rely on these simulations, improvements in the numerical codes will be implemented to achieve better agreement with experiments.

• OSTI ID: 21364672
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 10 Vol. 103; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

07 ISOTOPE AND RADIATION SOURCES
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
CONFIGURATION
CONVERGENCE
ELECTROMAGNETIC RADIATION
IMPLOSIONS
INDUSTRIAL RADIOGRAPHY
IONIZING RADIATIONS
LASERS
MATERIALS TESTING
NONDESTRUCTIVE TESTING
RADIATIONS
SIMULATION
SPHERICAL CONFIGURATION
TESTING
X RADIATION
X-RAY RADIOGRAPHY