DIAGNOSTICS OF LANGMUIR OSCILLATIONS IN A SUPERDENSE PLASMA

The level and the angular distribution of Langmuir oscillations in a d ense plasma produced on the Phoenix plasma radiation source (PRS) were measured. Line profiles of several lines in the Lyman series of Al XI I were measured using crystal spectrometers. A spectral line shape mod el,vas used, which attempted to take into account all significant broa dening mechanisms. The parameters of the plasma and the Langmuir oscil lations were found by generating profiles using the model and comparin g these profiles to the experimental spectra, The strength of the Lang muir oscillations was found to be E-0 approximate to 1-9 GV/cm, indica tive of a strong Langmuir turbulence. The polarization analysis of the profiles of the Al XIII Lyman gamma line has shown that the Langmuir oscillations develop anisotropically, primarily in the direction of th e plasma current.