Title :
Fast-Fourier-Transform Spectral-Analysis Techniques as a Plasma Fluctuation Diagnostic Tool
Author :
Smith, D.E. ; Powers, E.J. ; Caldwell, G.S.
Author_Institution :
Department of Electrical Engineering the University of Texas at Austin Austin, Texas 78712
Abstract :
A review is given of the key ideas involved in computing power spectral density functions from fast-Fourier-transformed plasma fluctuation data. Next a model is described which enables one to determine, from the computer-generated power spectra, the amplitude, frequency, and wavenumber of each of several waves present in the plasma. The potential of digitally implemented spectral analysis techniques as a plasma diagnostic tool is demonstrated in an experiment study of the evolution, and ultimate turbulent destruction, of a multi-mode drift wave spectrum.
Keywords :
fast Fourier transforms; plasma diagnostics; plasma instability; plasma turbulence; plasma waves; fast Fourier transform spectral analysis; multimode drift wave spectrum; plasma diagnostics; plasma fluctuation; plasma waves; power spectral density functions; turbulent destruction; Density functional theory; Face detection; Fluctuations; Frequency; Plasma density; Plasma diagnostics; Plasma measurements; Plasma waves; Power engineering computing; Spectral analysis;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.1974.4316849
