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Related Experiment Video

Updated: Jun 19, 2026

Blast Quantification Using Hopkinson Pressure Bars

Blast Quantification Using Hopkinson Pressure Bars

Published on: July 5, 2016

Stability of a shock-decelerated ablation front.

Y Aglitskiy¹, M Karasik, A L Velikovich

¹Science Applications International Corporation, McLean, Virginia 22150, USA.

Physical Review Letters

|October 2, 2009

Summary

Researchers studied laser-accelerated plastic targets impacting foam. They observed Rayleigh-Taylor instability growth during acceleration and noted that reshock after impact quenched this growth without initiating new instabilities.

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Area of Science:

Plasma physics
Laser-driven inertial confinement fusion

Background:

Understanding ablation front instabilities is crucial for inertial confinement fusion.
Laser acceleration of materials creates unique conditions for studying hydrodynamic instabilities.

Purpose of the Study:

To experimentally investigate shock-decelerated ablation front dynamics.
To analyze the growth and quenching of Rayleigh-Taylor (RT) and Richtmyer-Meshkov (RM) instabilities at the ablation front.

Main Methods:

A planar solid plastic target was laser-accelerated across a vacuum gap.
The accelerated target collided with a lower-density plastic foam layer.
High-speed imaging and analysis were used to observe perturbation growth at the ablation front.

Main Results:

Fast Rayleigh-Taylor (RT) growth of seeded perturbations was observed during target acceleration.
Ablation front velocity remained constant after collision with the foam.
Reshock following the collision effectively quenched RT growth.
No Richtmyer-Meshkov (RM) growth was triggered at the ablation front post-reshock.

Conclusions:

The experimental results align with theoretical predictions and simulations.
Reshock plays a critical role in stabilizing ablation fronts, preventing further instability growth.
This study provides valuable data for modeling laser-plasma interactions and fusion relevant phenomena.