Stimulated Raman backscattering instability in short pulse laser interaction with helium gas

Stimulated Raman backscattering instability in short pulse laser interaction with helium gas

Experimental and theoretical results on the stimulated Raman backscattering (SRS) reflectivity of a short laser pulse (120 fs) interaction with an optically ionized helium gas are presented. The reflectivity is measured as a function of the gas pressure from 1 to 100 Torr. A monodimensional (1‐D) th...

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Veröffentlicht in:Physics of Plasmas 1996-05, Vol.3 (5), p.1682-1688
Hauptverfasser: Malka, V., De Wispelaere, E., Marquès, J. R., Bonadio, R., Amiranoff, F., Blasco, F., Stenz, C., Mounaix, Ph, Grillon, G., Nibbering, E.
Format: Artikel
Sprache:eng
Schlagworte:
70 PLASMA PHYSICS AND FUSION
BACKSCATTERING
BEAM-PLASMA SYSTEMS
HELIUM
IONIZED GASES
LASER RADIATION
LASER-PRODUCED PLASMA
Optics
PARAMETRIC INSTABILITIES
PHOTON-ATOM COLLISIONS
Physics
PLASMA INSTABILITY
Plasma Physics
PONDEROMOTIVE FORCE
RAMAN EFFECT
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Zusammenfassung:Experimental and theoretical results on the stimulated Raman backscattering (SRS) reflectivity of a short laser pulse (120 fs) interaction with an optically ionized helium gas are presented. The reflectivity is measured as a function of the gas pressure from 1 to 100 Torr. A monodimensional (1‐D) theoretical model, including the refraction induced during the ionization process, describes the dependence of the SRS reflectivity with the gas pressure and explains its maximum at around 35 Torr. In the very low pressure case (
ISSN:1070-664X
1089-7674
DOI:10.1063/1.871688