Title :
Diagnostics of Langmuir oscillations in a superdense plasma
Author :
Weinheimer, J.J. ; Oks, E. ; Clothiaux, E.J. ; Schulz, A. ; Svidzinski, V.
Author_Institution :
Dept. of Phys., Auburn Univ., AL, USA
fDate :
8/1/1998 12:00:00 AM
Abstract :
The level and the angular distribution of Langmuir oscillations in a dense plasma produced on the Phoenix plasma radiation source (PRS) were measured. Line profiles of several lines in the Lyman series of Al XIII were measured using crystal spectrometers. A spectral line shape model was used, which attempted to take into account all significant broadening mechanisms. The parameters of the plasma and the Langmuir oscillations were found by generating profiles using the model and comparing these profiles to the experimental spectra. The strength of the Langmuir oscillations was found to be E0≈1-9 GV/cm, indicative of a strong Langmuir turbulence. The polarization analysis of the profiles of the Al XIII Lyman γ line has shown that the Langmuir oscillations develop anisotropically, primarily in the direction of the plasma current
Keywords :
plasma Langmuir waves; plasma density; plasma diagnostics; plasma oscillations; plasma turbulence; Al; Al XIII; Al XIII Lyman γ line; Langmuir oscillation strength; Langmuir oscillations level; Lyman series; Phoenix plasma radiation source; angular distribution; broadening mechanisms; crystal spectrometers; dense plasma; line profiles; plasma current direction; plasma parameters; polarization analysis; spectral line shape model; strong Langmuir turbulence; superdense plasma; Electric variables measurement; Plasma density; Plasma diagnostics; Plasma measurements; Plasma sources; Plasma temperature; Plasma waves; Plasma x-ray sources; Polarization; Spectroscopy;
Journal_Title :
Plasma Science, IEEE Transactions on
