Laser-to-proton conversion e/iciency studies for proton fast ignition
ORAL
Abstract
We assess the conversion e/iciency from intense picosecond laser pulses to multi-MeV
ion beams for a wide range of laser and target parameters,using 2D kinetic particle-in-cell
simulations. Scalings are addressed in a quasi-one-dimensional geometry, leaving out
beam divergence. Then, we study the conversion e/iciency into a narrow spatial band
along the laser axis for flat and hemispherical targets in large-scale 2D simulations.
Combining these findings allows us to calculate the energy requirements for ignition of a
compressed ICF target with an intense proton beam in a fast-ignition scenario.
ion beams for a wide range of laser and target parameters,using 2D kinetic particle-in-cell
simulations. Scalings are addressed in a quasi-one-dimensional geometry, leaving out
beam divergence. Then, we study the conversion e/iciency into a narrow spatial band
along the laser axis for flat and hemispherical targets in large-scale 2D simulations.
Combining these findings allows us to calculate the energy requirements for ignition of a
compressed ICF target with an intense proton beam in a fast-ignition scenario.
*This work was funded under the auspices of the U.S. Department of Energy by LawrenceLivermore National Laboratory under Contract No. DE-AC5207NA27344 with support from theLaboratory Directed Research and Development Program under tracking code 23-ERD-023.
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Presenters
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Andreas J Kemp
- LLNL
- Lawrence Livermore National Laboratory