Comparison of Rayleigh-Taylor Growth with 1.0 Micrometers and 0.25 Micrometers Lasers.

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Abstract:

It is shown, through numerical simulation that the Rayleigh-Taylor growth rate in laser-ablatively accelerated targets is reduced below the classical value kg to the 12 power, by factors of 3-4 with 0.25 micrometer laser light. The simulation results are supported by an analytical expression for the growth rates. These results provide further evidence for the viability of high-aspect ratio shells in direct-drive laser fusion. Keywords Laser ablation, Hydrodynamic instability.

Author(s):
Emery, M. H. ; Gardner, J. H. ; Bodner, S. E.
Author Organization(s):
NAVAL RESEARCH LAB WASHINGTON DC
Descriptive Note:
Interim rept. Sep 85-Mar 86,
Pagination:
0013

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
NRL-MR-5796
 Subject Terms
Modernization Areas:
Quantum Science and Computing
Communities of Interest:
Energy and Power Technologies
Descriptor(s):
*ABLATION, *LASER INDUCED FUSION, MATHEMATICAL MODELS, SIMULATION, RATIOS, GROWTH(GENERAL), NUMERICAL ANALYSIS, RATES, SHELLS(STRUCTURAL FORMS), LASER BEAMS, DRIVES, HYDRODYNAMIC CODES, ASPECT RATIO, LASER TARGET INTERACTIONS
Field(s)/Group(s):
Lasers and Masers, Fusion Devices (Thermonuclear), Plasma Physics and Magnetohydrodynamics
Keyword(s):
Rayleigh Taylor Instabilities, Fast 2D computer program
Report Date:
1986 May 29