Self-focusing of a spatially modulated beam within the paraxial complex geometrical optics framework in low-density plasmas

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00552139" target="_blank" >RIV/68378271:_____/21:00552139 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1088/1361-6587/ac2e43" target="_blank" >https://doi.org/10.1088/1361-6587/ac2e43</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1088/1361-6587/ac2e43" target="_blank" >10.1088/1361-6587/ac2e43</a>

Result language
angličtina
Original language name
Self-focusing of a spatially modulated beam within the paraxial complex geometrical optics framework in low-density plasmas
Original language description
Accurate modelling of ponderomotive laser self-focusing may represent a key for the success of inertial confinement fusion, especially within the shock ignition approach. From a numerical point of view, implementation of a paraxial complex geometrical optics (PCGO) method has improved the performance of the hydrodynamics code CHIC, but (1) overestimating ponderomotive speckle self-focusing in reduced two-dimensional geometry, and (2) not accounting for speckle intensity statistics. The first issue was addressed in our previous work (Ruocco et al 2019 Plasma Phys. Control. Fusion 61 115009). Based on those results, here we propose a novel PCGO scheme for modelling spatially modulated laser beams by (1) creating Gaussian speckles, and (2) emulating the realistic speckle intensity statistics. Self-focusing of spatially modulated beams in a homogeneous stationary plasma with this method is studied. This investigation evidences that plasma smoothing does not reduce the speckle intensity enhancement at long time scales when the average beam intensity is twice above the speckle critical intensity.
Czech name
—
Czech description
—

Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
—
OECD FORD branch
10305 - Fluids and plasma physics (including surface physics)

Project
<a href="/en/project/LQ1606" target="_blank" >LQ1606: ELI Beamlines: International Center of Excelence</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Similar results(10)