Correlation between electron heat diffusivity and short wavelength (kρ(i) ~ 5) fluctuation amplitude was observed in the TFTR tokamak in the core of ERS plasmas (Phys. Lett. A 236 (1997) 339). These fluctuations propagate in the ion diamagnetic drift direction with wave number comparable to ω(pe)/C. Further analysis of these data yields the ratios χ(e)/χ(i) and χ(e)/D(e), 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 (kρ(i) ~ 1) fluctuations are absent. Although there is not enough information to identify these short wavelength modes, the values of χ(e) is found to be comparable to theoretical predictions based on the current diffusive ballooning mode theory (Plasma Phys. Control. Fusion 36 (1994) 279). (C) 2000 Elsevier Science B.V.
|Number of pages||5|
|Journal||Physics Letters, Section A: General, Atomic and Solid State Physics|
|Publication status||Published - Nov 6 2000|
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)