Measurement of T(e)-profiles in the boundary layer of TEXTOR by means of spectroscopical observation of a thermal helium beam
A collisional radiative model has been developed recently which can be applied to the spatially resolved optical spectroscopy of a thermal helium beam, for the measurement of T(e) profiles in the boundary layer of TEXTOR. The ratios of singlet to triplet line intensities are modelled for electron densities in the boundary layer ranging from 1.0 E12 to 1.0 E13/cm3. In order to demonstrate the density dependencies, T(e) profiles have been calculated using the measured n(e) profiles. For electron densities above this range, triplet levels seem to be more densely populated than predicted, possibly due to the limitations in the model to transitions with n less than or equal to 4.
Bibliographic Reference: Article: 18th European Conference on Controlled Fusion and Plasma Physics, Vol. IV (1991) pp. 361-364
Record Number: 199111405 / Last updated on: 1994-12-02
Original language: en
Available languages: en