Study of density and potential fluctuations in the TEXT tokamak with a heavy ion beam probe

A heavy ion beam probe was used to study the characteristics of density and potential fluctuations in the TEXT tokamak. Fluctuations of density and space potential are nearly Boltzmann like, n/spl tilde//n/spl sim//spl phi//spl tilde//kT/sub e/, near the edge of the plasma (0.80.9). The turbulent E/spl I.oarr//spl times/B/spl I.oarr/ radial particle flux is sufficient to account for all of the particle loss from the tokamak. No poloidal asymmetries, within a poloidal angle range of about 70/spl deg/, are observed in the fluctuation levels. The fluctuation spectral shape, the density potential phase angle, and the fluctuation propagation speed show a strong radial dependence.<>