Measurements of parametric instabilities at laser intensities relevant to strong shock generation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F18%3A00490069" target="_blank" >RIV/68378271:_____/18:00490069 - isvavai.cz</a>
Alternative codes found
RIV/61389021:_____/18:00490099
Result on the web
<a href="http://dx.doi.org/10.1063/1.5006021" target="_blank" >http://dx.doi.org/10.1063/1.5006021</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1063/1.5006021" target="_blank" >10.1063/1.5006021</a>
Alternative languages
Result language
angličtina
Original language name
Measurements of parametric instabilities at laser intensities relevant to strong shock generation
Original language description
Parametric instabilities at laser intensities in the range (2–6) x 1015 W/cm2 (438 nm, 250 ps, 100–300 J) have been investigated in planar geometry at the Prague Asterix Laser System facility via calorimetry and spectroscopy. Experimental data show that Stimulated Brillouin Scattering (SBS) is more effective than Stimulated Raman Scattering (SRS) in degrading laser-plasma coupling, therefore reducing the energy available for the generation of the shock wave. The level of the SBS backscatter and laser reflection is found to be in the range between 3% and 15% of the incident laser energy, while Backward SRS (BRS) reflectivity ranges between 0.02% and 0.2%, depending on the delay between the pulses. Half-integer harmonic emission is observed and provides a signatureof Two Plasmon Decay (TPD) occurring around the quarter of the critical density. Our measurements indicate, besides others, that hot electrons are predominantly produced by SRS rather than TPD.
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
10305 - Fluids and plasma physics (including surface physics)
Result continuities
Project
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Others
Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Physics of Plasmas
ISSN
1070-664X
e-ISSN
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Volume of the periodical
25
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
12
Pages from-to
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UT code for WoS article
000424021700080
EID of the result in the Scopus database
2-s2.0-85040446149