Electron Temperature Measurement by Thomson Scattering in Tokamak NOVA II

Abstract

The Thomson scattering method was applied to determine the temperature and density profiles of plasma electrons in the NOVA II tokamak. To minimize the intensity of stray light, use was made of a viewing damp, which was an array of blue-glass knife edges. The radial profile of electron density has been found to be approximately parabolic, while the temperature profile appeared more peaky and can be represented by the square of the parabolic expression. The electron energy confinement time determined by this method is in good agreement with that predicted by the Alcator scaling law.