Ablative stabilization of the Rayleigh-Taylor instability in regimes relevant to inertial confinement fusion
As shown elsewhere an ablatively imploded shell is hydrodynamically unstable, the dominant instability being the well known Rayleigh-Taylor instability with growth rate {gamma} = {radical}Akg where k = 2{pi}/{lambda} is the wave number, g is the acceleration and A the Attwood number ({rho}{sub hi} {minus} {rho}{sub lo})/({rho}{sub hi} + {rho}{sub lo}) where {rho}{sub hi} is the density of the heavier fluid and {rho}{sub lo} is the density of the lighter fluid. A theoretical understanding of ablative stabilization has gradually evolved, confirmed over the last five years by experiments. The linear growth is very well understood with excellent agreement between experiment and simulation for planar geometry with wavelengths in the region of 30--100{mu}m. There is an accurate, albeit phenomenological dispersion relation. The non-linear growth has been measured and agrees with calculations. In this lecture, the authors go into the fundamentals of the Rayleigh-Taylor instability and the experimental measurements that show it is stabilized sufficiently by ablation in regimes relevant to ICF.
- Research Organization:
- Lawrence Livermore National Lab., CA (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 10185667
- Report Number(s):
- UCRL-JC-115189; CONF-9408127-3; ON: DE95000553; TRN: 94:020302
- Resource Relation:
- Conference: 45. Scottish Universities summer school in physics,Fife (United Kingdom),7-20 Aug 1994; Other Information: PBD: 4 Aug 1994
- Country of Publication:
- United States
- Language:
- English
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A review of the ablative stabilization of the Rayleigh--Taylor instability in regimes relevant to inertial confinement fusion
A review of the ablative stabilization of the Rayleigh-Taylor instability in regimes relevant to ICF
Related Subjects
LASER FUSION REACTORS
RAYLEIGH-TAYLOR INSTABILITY
STABILIZATION
DIRECT DRIVE LASER IMPLOSION
INDIRECT DRIVE LASER IMPLOSION
INSTABILITY GROWTH RATES
ABLATION
NOVA FACILITY
700340
700411
PLASMA WAVES, OSCILLATIONS, AND INSTABILITIES
INERTIAL CONFINEMENT DEVICES