Study of homogeneity in the density of long plasmas for wavelength pulsing experiments

Two lasers with wavelengths of 1.053 and 1.064 micrometers, respectively, are used to generate intense electric fields in a plasma in order to accelerate charged particles. A long homogeneous plasma at least 5 mm in length is needed in order to diagnose the plasma. The plasma is obtained by multiphotoionization of deuterium or hydrogen at a pressure of 23 millibars. If the ionization is total, the density of the plasma obtained near the focusing tens of the laser is equal to the initial density of the atoms in the test chamber. Study of the plasma by Thomson diffusion allows analysis of evolution in density and temperature.