Title :
Imaging of core electron temperature fluctuations of tokamak plasmas
Author :
Deng, B.H. ; Brower, D.L. ; Cima, G. ; Domier, C.W. ; Donné, A. J H ; Luhmann, N.C., Jr. ; Oyevaar, Th. ; Wootton, A.
Author_Institution :
Dept. of Appl. Sci., California Univ., Davis, CA, USA
fDate :
2/1/2002 12:00:00 AM
Abstract :
Imaging techniques applied to plasma turbulence data have lead to the discovery of unexpected two-dimensional patterns in the fluctuation levels. The data are obtained in the core of tokamak plasmas, using the novel technique of correlation intensity interferometry. Low-frequency fluctuations, usually associated with tearing modes, are not only found as expected near the q = 2 surface, but also on the midplane outside this surface. Higher frequency fluctuations, usually associated with the drift wave family, are poloidally localized
Keywords :
Tokamak devices; interferometry; plasma fluctuations; plasma magnetohydrodynamics; plasma toroidal confinement; plasma turbulence; tearing instability; 0 to 250 kHz; Tokamak plasmas; core electron temperature fluctuations imaging; correlation intensity interferometry; drift wave family; low-frequency fluctuations; midplane; plasma turbulence; poloidally localised higher frequency fluctuations; tearing modes; tokamak plasmas; two-dimensional patterns; Electrons; Fluctuations; Frequency; Magnetic field measurement; Plasma diagnostics; Plasma measurements; Plasma temperature; Plasma transport processes; Plasma waves; Tokamaks;
Journal_Title :
Plasma Science, IEEE Transactions on
DOI :
10.1109/TPS.2002.1003929
