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Updated: Mar 8, 2026
11:20
Investigation of Early Plasma Evolution Induced by Ultrashort Laser Pulses
Published on: July 2, 2012
15.6K
Interplay of Laser-Plasma Interactions and Inertial Fusion Hydrodynamics.
D J Strozzi1, D S Bailey1, P Michel1
1Lawrence Livermore National Laboratory, Livermore, California 94551, USA.
Physical Review Letters
|January 28, 2017
Summary
This study introduces a new model for laser-plasma interactions in fusion hohlraums. The findings reduce discrepancies in experimental data by accounting for energy transfer within plasma waves.
Area of Science:
- Plasma Physics
- Fusion Energy
- Computational Physics
Background:
- Laser-plasma interactions (LPI) significantly influence inertial confinement fusion (ICF) hohlraum dynamics.
- Understanding LPI is crucial for accurate ICF target performance modeling.
Purpose of the Study:
- To investigate the effects of LPI on ICF hohlraum dynamics.
- To develop a self-consistent model coupling reduced LPI physics with radiation-hydrodynamics codes.
Main Methods:
- Coupling reduced LPI models (stimulated Raman scatter, crossed-beam energy transfer) into radiation-hydrodynamics codes.
- Analyzing the interplay between hydrodynamics and LPI via energy and momentum deposition into plasma waves.
- Investigating the spatial redistribution of energy coupling and its effect on laser propagation.
Main Results:
- The model demonstrates reduced crossed-beam energy transfer (CBET).
- Significant laser energy depletion by Langmuir waves was observed.
- The model successfully reduces discrepancies in hohlraum experiments concerning wall x-ray emission and capsule implosion shape.
Conclusions:
- The new modeling approach accurately captures LPI effects in hohlraums.
- Self-consistent coupling of LPI and hydrodynamics is essential for predictive ICF simulations.
- Improved modeling enhances the fidelity of fusion experiment predictions.
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