Reconstruction of the laser wave-front by stimulated scatterings in the pico-second range

The reconstruction of the exciting laser wave-front by the backward Stimulated Raman Scattering (S.R.S.) and Rayleigh Wing Scattering (S.W.R.S.) is observed in benzene and cyclohexane in the case of pico-second pulses. The characteristic properties of this reconstruction are different of those obtained in the nano-second range.     

Stimulated Low-Frequency Raman Scattering in LaF<Subscript>3</Subscript> Suspensions

We observe stimulated low-frequency Raman scattering (SLFRS) caused by laser pulse interaction with acoustic vibrations of nanoparticles in water suspensions of LaF₃ nanoparticles. We show that frequency shifts of the scattering correspond to the eigenfrequencies of nanoparticles vibrations. LaF₃ nanoparticles were synthesized in the presence of glycine by a double jet precipitation technique at various initial concentrations of reagents. We investigate the morphologies and particle sizes as well as size distributions of the particles prepared using transmission electron microscopy (TEM) and dynamical light scattering (DLS). In view of the absorption spectroscopy, we show that the reaction system components and products have no absorption in the visible region, including λ = 694.3 nm. From the luminescence spectroscopy, we find also that they do not emit at λ = 694.3 nm excitation.     

Parametric Studies of a Globus-3 Spherical Tokamak with Various Options of Electromagnetic Systems Based on Copper Alloys Using the GLOBSYS Code

Physics of Atomic Nuclei - The engineering part of the GLOBSYS code is presented, and the parameters of the Globus-3 facility, which is a development of the Globus program, are analyzed. The...