Probe measurements of fluctuations responsible for turbulent heating of plasmas

Experiments are described in which the correlation time and fluctuation level of ion waves are measured under the condition of turbulent heating using twin capacitive probes. When the resistivity becomes anomalous, the correlation time becomes shorter, typically several periods of ion waves, and the energy density of the waves is of the order of 0.2.10-2 n sub(e)T sub(e). The ion heating rate and correlation times of ion waves (electrostatic ion cyclotron waves) are well explained by the quasilinear theories dealing with the stochastic mechanism. The anomalous resistivity is also found to result in the rapid electron heating. (author)