1. Thomson diffusion application : 1 Electron plasma monitor: A laser beam that passes through plasma interacts with free plasma electrons so that minute amount of the laser light is scattered from them. The TCV Thomson scattering setup. Laser light scattered by the plasma is observed at 25 points (black circles). Tokamak a Configuration Variabile

2. Thomson diffusion application: 2 Ultra short X-RAY SOURCE from Th. SCATTERING: the laser fotons are “classical” in the beam rest frame → Th. Sc.

4. Rayleigh diffusion application Rayleigh crosssection depends on density, i.e. on refraction index. More dense region deflects more a laser beam→ can be used to monitor the fluidodynamics of high temperature gases, macromolecules and a wide range of particles in solution. n= refraction index N = gas density Flame development by R. imaging : laser beam modulated by R.D. In the gas

5. Rayleigh diffusion application : 2