Observation and modelling of stimulated Raman scattering driven by an optically smoothed laser beam in experimental conditions relevant for shock ignition
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61389021%3A_____%2F21%3A00552635" target="_blank" >RIV/61389021:_____/21:00552635 - isvavai.cz</a>
Alternative codes found
RIV/68378271:_____/21:00552234
Result on the web
<a href="https://www.cambridge.org/core/services/aop-cambridge-core/content/view/896DCA6E117488E1E6BB33C05085CD6F/S2095471921000487a.pdf/observation-and-modelling-of-stimulated-raman-scattering-driven-by-an-optically-smoothed-laser-beam-in-experimental-conditions-relevant-for-shock-ignition.pdf" target="_blank" >https://www.cambridge.org/core/services/aop-cambridge-core/content/view/896DCA6E117488E1E6BB33C05085CD6F/S2095471921000487a.pdf/observation-and-modelling-of-stimulated-raman-scattering-driven-by-an-optically-smoothed-laser-beam-in-experimental-conditions-relevant-for-shock-ignition.pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1017/hpl.2021.48" target="_blank" >10.1017/hpl.2021.48</a>
Alternative languages
Result language
angličtina
Original language name
Observation and modelling of stimulated Raman scattering driven by an optically smoothed laser beam in experimental conditions relevant for shock ignition
Original language description
We report results and modelling of an experiment performed at the Target Area West Vulcan laser facility, aimed at investigating laser-plasma interaction in conditions that are of interest for the shock ignition scheme in inertial confinement fusion (ICF), that is, laser intensity higher than impinging on a hot (1$]]> keV), inhomogeneous and long scalelength pre-formed plasma. Measurements show a significant stimulated Raman scattering (SRS) backscattering (of laser energy) driven at low plasma densities and no signatures of two-plasmon decay (TPD)/SRS driven at the quarter critical density region. Results are satisfactorily reproduced by an analytical model accounting for the convective SRS growth in independent laser speckles, in conditions where the reflectivity is dominated by the contribution from the most intense speckles, where SRS becomes saturated. Analytical and kinetic simulations well reproduce the onset of SRS at low plasma densities in a regime strongly affected by non-linear Landau damping and by filamentation of the most intense laser speckles. The absence of TPD/SRS at higher densities is explained by pump depletion and plasma smoothing driven by filamentation. The prevalence of laser coupling in the low-density profile justifies the low temperature measured for hot electrons (keV), which is well reproduced by numerical simulations.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10306 - Optics (including laser optics and quantum optics)
Result continuities
Project
<a href="/en/project/LTT17015" target="_blank" >LTT17015: Reserch in frame International Center for Dense Magnetized Plasmas</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
High Power Laser Science and Engineering
ISSN
2095-4719
e-ISSN
2052-3289
Volume of the periodical
9
Issue of the periodical within the volume
October
Country of publishing house
GB - UNITED KINGDOM
Number of pages
19
Pages from-to
e60
UT code for WoS article
000721739700001
EID of the result in the Scopus database
2-s2.0-85120533475