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Large aperture harmonic conversion experiments at Lawrence Livermore National Laboratory.

G J Linford1, B C Johnson, J S Hildum

  • 1University of California, Lawrence Livermore National Laboratory, PO Box 808, Livermore, California 94550, USA.

Applied Optics
|April 17, 2010
PubMed
Summary

High-energy harmonic conversion experiments achieved up to 346 Joules at 83% efficiency. These advancements in laser technology enhance inertial confinement fusion target performance.

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Area of Science:

  • Laser Physics
  • Plasma Physics
  • Fusion Energy

Background:

  • High-power lasers are crucial for inertial confinement fusion (ICF) research.
  • Efficient harmonic conversion is essential for optimizing ICF target performance.
  • Previous harmonic conversion methods faced limitations in energy and efficiency.

Purpose of the Study:

  • To describe large aperture harmonic conversion experiments on the Argus laser.
  • To achieve high energies at 2 omega (532 nm), 3 omega (355 nm), and 4 omega (266 nm).
  • To evaluate the impact of harmonic conversion on ICF target performance.

Main Methods:

  • Utilized the Argus laser at Lawrence Livermore National Laboratory for harmonic conversion experiments.
  • Performed large aperture harmonic conversion to 2, 3, and 4 omega laser wavelengths.
  • Measured harmonically converted energies and external conversion efficiencies.

Main Results:

  • Generated up to 346 Joules of harmonically converted energy.
  • Achieved external conversion efficiencies as high as 83%.
  • Observed enhanced performance in 2 omega and 3 omega ICF target experiments.

Conclusions:

  • Demonstrated high-efficiency, high-energy harmonic conversion is achievable.
  • These results indicate significant potential for improving ICF target coupling.
  • The developed techniques offer a pathway to more efficient laser-driven fusion energy research.