Simulations of NOVA direct-drive Rayleigh-Taylor experiments
Directly driven Rayleigh-Taylor instability growth experiments being performed on NOVA have been simulated using the computer code, LASNEX. These experiments employ beams smoothed with random phase plates (RPP), and will later include smoothing by spectral dispersion (SSD). Samples are CH foils with or without imposed sinusoidal surface perturbations. Perturbation growth is diagnosed by means of x-ray backlighting. Calculated growth rates are fairly flat across the wavelength range of 20--80 {mu}m which can be accessed experimentally, and are moderately suppressed below classical growth rates. Perturbations of large enough initial amplitude that the contrast in the x-ray image is measurable from the start of the experiment quickly grow into the nonlinear regime. Smaller initial amplitudes result in a longer interval of linear growth, but the initial perturbation will not be detectable in the data. Structure which is predicted to develop from speckles in the RPP beam pattern, with and without SSD, is also presented.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- Sponsoring Organization:
- DOE/DP
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 6473318
- Report Number(s):
- UCRL-JC-104372; CONF-9011127-9; ON: DE91004881
- Resource Relation:
- Conference: 32. annual meeting of the American Physical Society - Division of Plasma Physics (APS/DPP), Cincinnati, OH (USA), 12-16 Nov 1990
- Country of Publication:
- United States
- Language:
- English
Similar Records
Laser driven Rayleigh-Taylor instability experiments on Nova
Large growth, planar Rayleigh--Taylor experiments on Nova
Related Subjects
LASER-PRODUCED PLASMA
RAYLEIGH-TAYLOR INSTABILITY
INSTABILITY GROWTH RATES
INERTIAL CONFINEMENT
L CODES
NOVA FACILITY
PLASMA DIAGNOSTICS
PLASMA SIMULATION
X-RAY DETECTION
COMPUTER CODES
CONFINEMENT
DETECTION
INSTABILITY
PLASMA
PLASMA CONFINEMENT
RADIATION DETECTION
SIMULATION
700208* - Fusion Power Plant Technology- Inertial Confinement Technology
700107 - Fusion Energy- Plasma Research- Instabilities
700102 - Fusion Energy- Plasma Research- Diagnostics