This project will be experimental, based on the MAGPIE linear plasma device at the ANU and/or analysis of data from the H-1 Heliac, a toroidal magnetic confinemen device. The student will be using Langmuir probes to study the plasma electron temperature and ion density, and the floating and plasma potential, examining both the average quantities and looking at the behaviour of fluctuations, and how the particle transport arising from these fluctuations can influence the overall discharge properties. The project will involve modelling the plasma from the point of view of the particle balance equation, examining the relative contributions of parallel and perpendicular components. Preliminary results suggest that in MAGPIE, the fluctuation-induced flux is inwards at the very centre, which should lead to an increase of the plasma density as you go down the device. On the other hand in H-1, the flux can be outwards or inwards, and can degrade the plasma density. Analysis of the particle balance will also require a measurement of the plasma flow, which will utilize coherence imaging system, and of the plasma neutral density, which will be based on gauges and absolutely calibrated light intensity from excited neutrals. It will also involve the use of dual probe systems and statistical data anslysis techniques for evaluating the spatial structure of turbulence, as shown in the figure.