Related Experiment Video
Updated: Apr 10, 2026
09:20
Visualizing the Effects of Oxidative Damage on Drosophila Egg Chambers using Live Imaging
Published on: April 10, 2021
4.3K
Evidence for a bubble-competition regime in indirectly driven ablative Rayleigh-Taylor instability experiments on the
D A Martinez1, V A Smalyuk1, J O Kane1
1Lawrence Livermore National Laboratory, Livermore, California 94550, USA.
Physical Review Letters
|June 13, 2015
Summary
Researchers studied the ablative Rayleigh-Taylor instability using the National Ignition Facility. They observed a bubble-merger regime in indirect-drive inertial confinement fusion for the first time, showing nonlinear growth beyond saturation levels.
Area of Science:
- Plasma Physics
- Inertial Confinement Fusion
- Astrophysical Fluid Dynamics
Background:
- The ablative Rayleigh-Taylor instability is crucial for inertial confinement fusion (ICF) and astrophysical phenomena.
- Understanding the transition from weakly to highly nonlinear regimes is key for predicting instability growth.
Purpose of the Study:
- To investigate the ablative Rayleigh-Taylor instability in the transition from weakly to highly nonlinear regimes.
- To achieve and characterize the bubble-merger regime in an indirect-drive ICF configuration.
Main Methods:
- Experiments conducted at the National Ignition Facility (NIF).
- Acceleration of a planar plastic package with broadband modulations using X-ray drive from a gold radiation cavity.
- X-ray radiography used to measure modulation optical density.
Main Results:
- Achieved a bubble-merger regime for Rayleigh-Taylor instability at an ablation front in indirect drive for the first time.
- Observed nonlinear growth of multimode modulation amplitudes beyond the Haan multimode saturation level.
- Demonstrated evolution towards longer wavelengths and insensitivity to initial conditions.
Conclusions:
- The study successfully demonstrated the bubble-merger regime in indirect-drive ICF.
- Results provide critical data for validating and improving ICF models.
- Findings contribute to understanding fundamental fluid instabilities in extreme conditions.
