Fourier-Space Nonlinear Rayleigh-Taylor Growth Measurements of 3D Laser-Imprinted Modulations in Planar Targets

Journal Article · Fri Nov 18 00:00:00 EST 2005 · Physical Review Letters

DOI:https://doi.org/10.1103/PhysRevLett.95.215001· OSTI ID:20699581

Smalyuk, V A; Sadot, O; Delettrez, J A; Meyerhofer, D D; Regan, S P; Sangster, T C ^[1]

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

Nonlinear growth of 3D broadband nonuniformities was measured near saturation levels using x-ray radiography in planar foils accelerated by laser light. The initial target modulations were seeded by laser nonuniformities and later amplified during acceleration by Rayleigh-Taylor instability. The nonlinear saturation velocities are measured for the first time and are found to be in excellent agreement with Haan predictions [Phys. Rev. A 39, 5812 (1989)]. The measured growth of long-wavelength modes is consistent with enhanced, nonlinear, long-wavelength generation in ablatively driven targets.

• OSTI ID: 20699581
• Journal Information: Physical Review Letters, Vol. 95, Issue 21; Other Information: DOI: 10.1103/PhysRevLett.95.215001; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
ACCELERATION
FOILS
LASERS
MODULATION
NONLINEAR PROBLEMS
PLASMA
PLASMA DIAGNOSTICS
PLASMA PRODUCTION
RAYLEIGH-TAYLOR INSTABILITY
SATURATION
WAVELENGTHS
X-RAY RADIOGRAPHY