Abstract
A Thomson scattering diagnostic capable of achieving one-discharge, high-resolution spectra through use of a microchannel plate image intensifier coupled to an optical multichannel analyzer has been implemented on a theta-pinch device. The improved resolution permits measurements of local average electron velocities and current densities. First-order relativistic corrections and anomalous velocity-space fluctuations are directly observable. The enhanced fluctuations are attributed to electrons interacting with unstable waves.
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