Extra ion feature of Thomson scattered light in the interaction of a 600 ps laser with helium gas jet

Victor Malka 1 E. de Wispelaere 2 Ph. Mounaix 3 Stefan Hüller 3 F. Amiranoff 2 F. Dorchies 2 A. Modena 2
1 LOA - Laboratoire d'optique appliquée
2 LULI - Laboratoire pour l'utilisation des lasers intenses
3 CPHT - Centre de Physique Théorique [Palaiseau]
Abstract : The interaction of a 600 ps laser pulse at 0.53 μm wavelength with helium gas jet with an electron density of 8×10^19 cm^−3 has been studied. In this experiment the plasma parameters for density and temperature were well-defined via time-resolved Thomson scattering. Ion Thomson scattering measurements at 45° show two extra satellites which correspond to the rescattering of the Brillouin backscattered light off the thermal ion acoustic waves. Analysis of the relative amplitudes of these satellites gives a very high value of 65% of the instantaneous reflectivity at its maximum. Theoretical spectra are in good agreement with the experimental ones.
Keywords : helium laser beam effects light scattering plasma production by laser plasma waves Brillouin spectra backscatter plasma light propagation
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Journal articles
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Submitted on : Monday, February 28, 2011 - 5:31:57 PM
Last modification on : Wednesday, July 3, 2019 - 10:48:02 AM

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Victor Malka, E. de Wispelaere, Ph. Mounaix, Stefan Hüller, F. Amiranoff, et al.. Extra ion feature of Thomson scattered light in the interaction of a 600 ps laser with helium gas jet. Physics of Plasmas, American Institute of Physics, 2003, 10 (2), pp.495. ⟨10.1063/1.1535417⟩. ⟨hal-00570627⟩

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