Specialist Physics Seminar 6 October 2004


Ion Emission and Temperature Tomography on H-1NF

Fenton Glass
Australian National University, Canberra Australia


A visible Doppler spectroscopy tomography system, based on a multi-channel coherence-imaging spectrometer, has been installed and operated on the H-1NF heliac, located at the Australian National University in Canberra, Australia. This system can produce tomographically-inverted, time-resolved images of ion spectral line emission and ion temperature. In addition, the bulk flow velocity can be estimated from five poloidal positions. For reproducible plasma discharges, tomographic inversions of the emission may be performed without recourse to constraints. The novel tomography system is outlined and results of ion spectral emissions, ion temperatures and flow velocities are presented including the dynamics of a large-scale, rotating, coherent instability.