Observation and Measurement of Turbulent Radial Transport in a Dipole*

We present results from measurements of turbulent radial in a mechanically supported dipole. A new diagnostic composed of 16 floating potential probes and 15 ion saturation probes alternately placed on a 90 degree arc. By considering the difference in floating potential between two tips, we measure the local electric field. This measurement gives us a measure of the radial particle flux. We propose an active feedback system which attempts to suppress this turbulent radial transport via applying radial electric fields from a equatorial biasing array, as determined by the reference input from the 31-tip array. We also present results from a previously attempted method for observing bulk plasma motion through the imaging of mono- disperse dust particles. By tracking the particle trajectories, we can get measurements of acceleration, and therefore electric fields, in the interior of our plasma. In combining these diagnostics we hope to achieve a better understanding of turbulent transport in a dipole.