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 ([ital E][gt][ital T][sub [ital e][ital a]]) due to parallel streaming along a fluctuating magnetic field is determined locally by measuring the correlated product [l angle][ital [tilde J]][sub [ital e]][ital [tilde B]][sub [ital r]][r angle]. Particle transport is small just inside the last closed flux surface ([Gamma][sub [ital e],mag][lt]0.1[Gamma][sub [ital e],total]), but can account for all observed particle losses inside [ital r]/[ital a]=0.85. Electron diffusion is found to increase with parallel velocity, as expected for diffusion in a region of field stochasticity.