PARTICLE-TRANSPORT DUE TO MAGNETIC FLUCTUATIONS

Electron current fluctuations are measured with an electrostatic energy analyzer at the edge of the MST reversed-field pinch plasma. The radial flux of fast electrons (E > T(ea)) due to parallel streaming along a fluctuating magnetic field is determined locally by measuring the correlated product [J(e)B(r)]. Particle transport is small just inside the last closed flux surface (GAMMA(e,mag) < 0.1 GAMMA(e,total)), but can account for all observed particle losses inside r/a = 0.85. Electron diffusion is found to increase with parallel velocity, as expected for diffusion in a region of field stochasticity.