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Flow-induced beam steering in a single laser hot spot
1Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA.
Physical Review Letters
|October 4, 2000
Summary
A laser beam passing through supersonic plasma flow was deflected up to 10 degrees, showing bowlike patterns. This flow-induced beam steering was accurately predicted by a 3D hydrodynamic simulation.
Area of Science:
- Plasma Physics
- Laser-Plasma Interactions
- Fluid Dynamics
Background:
- Understanding laser propagation in dynamic plasma environments is crucial for applications like inertial confinement fusion.
- Supersonic plasma flows can significantly alter laser beam characteristics.
Purpose of the Study:
- To experimentally measure the transmitted angular distribution of a laser beam after interacting with a supersonic transverse plasma flow.
- To compare experimental results with 3D hydrodynamic simulations to validate models of laser-plasma interaction.
Main Methods:
- A 527 nm nearly diffraction-limited laser beam was transmitted through a plasma with supersonic transverse flow.
- The transmitted angular distribution of the laser beam was measured.
- A 3D hydrodynamic simulation of the plasma flow and laser interaction was performed.
Main Results:
- The laser beam was deflected by as much as 10 degrees.
- The beam exhibited bowlike features in the direction of the plasma flow.
- Experimental measurements showed good agreement with the 3D hydrodynamic simulation.
Conclusions:
- The observed laser beam deflection and features are attributed to flow-induced beam steering.
- 3D hydrodynamic simulations are effective in predicting laser-plasma interactions in supersonic flows.
- The study validates the use of simulations for understanding complex laser-plasma dynamics.
