Open AccessShort Wavelength Fluctuations and Electron Transport in TFTR
Author(s) -
K. L. Wong,
K. Itoh,
Sanae–I. Itoh,
A. Fukuyama,
M. Yagi
Publication year - 2000
Language(s) - English
Resource type - Reports
DOI - 10.2172/762910
Subject(s) - tokamak , wavelength , plasma , atomic physics , tokamak fusion test reactor , electron temperature , physics , electron , amplitude , thermal diffusivity , diffusion , diamagnetism , computational physics , nuclear physics , optics , magnetic field , thermodynamics , quantum mechanics
Correlation between electron heat diffusivity and short wavelength (kri {approximately} 5) fluctuation amplitude was observed in the Tokamak Fusion Test Reactor (TFTR) tokamak in the core of enhanced reversed shear (ERS) plasmas [1]. These fluctuations propagate in the ion diamagnetic drift direction with wave number comparable to wpe/c. Further analysis of these data yields the ratios ce/ci and ce/De, and their values are consistent with the picture that the electron transport is mainly induced by the short wavelength fluctuations in the plasma core where the long wavelength (kri {approximately} 1) fluctuations are absent. Although there is not enough information to identify these short wavelength modes, the values of ce is found to be comparable to theoretical predictions based on the current diffusive ballooning mode theory [2]