PPPL-3487 is available in <a href="PPPL-3487.pdf">pdf</a> or 
<a href="PPPL-3487.ps">postscript</a> formats.

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<b>Short Wavelength Fluctuations and Electron Transport in TFTR</b>
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Authors: K.L. Wong, K. Itoh, S.-I. Itoh,  A. Fukuyama, M. Yagi
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<b>Date of PPPL Report:</b> September 2000
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<b>Submitted to: </b>Physics Letters A
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Correlation between electron heat diffusivity and short wavelength (k<FONT FACE = "symbol">r</FONT FACE = "symbol"><sub>i</sub> ~ 5) fluctuation amplitude was observed in the Tokamak Fusion Test Reactor (TFTR) in the core of Enhanced Reversed Shear (ERS) plasmas. These fluctuations propagate in the ion diamagnetic drift direction with wave number comparable to  <FONT FACE = "symbol">w</FONT FACE = "symbol"><sub>pe</sub>/c. Further analysis of these data yields the ratios <FONT FACE = "symbol">c</FONT FACE = "symbol"><sub>e</sub>/<FONT FACE = "symbol">c</FONT FACE = "symbol"><sub>i</sub> and <FONT FACE = "symbol">c</FONT FACE = "symbol"><sub>e</sub>/D<sub>e</sub>, 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 (k<FONT FACE = "symbol">r</FONT FACE = "symbol"><sub>i</sub> ~ 1) fluctuations are absent. Although there is not enough information to identify these short wavelength modes, the values of <FONT FACE = "symbol">c</FONT FACE = "symbol"><sub>e</sub> are found to be comparable to theoretical predictions based on the current diffusive ballooning mode theory.
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