H(alpha) measurements and modeling of plasma confinement in TEXTOR with the ALT-II pump limiter
Measurements of the H(alpha) emission in TEXTOR with the ALT-II toroidal belt limiter are analysed with the neutral transport code DEGAS for ohmic discharges with carbonised walls. The core efflux, particle confinement time, diffusion coefficient, boundary flow asymmetry and core fuelling rate profiles are determined for a range of line-averaged densities. A principal result of this work is that edge probe measurements, taken at locations that are both radially and poloidally removed from the limiter, can be used in DEGAS to predict H(alpha) emission near the ALT-II blades and the TEXTOR vacuum liner. In addition, the core plasma fuelling rates and profiles from the DEGAS H(alpha) simulations can be used with confidence in, for example, TRANSP analyses of core plasma transport.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 176 & 177 (1990) pp. 803-809
Record Number: 199110647 / Last updated on: 1994-12-02
Original language: en
Available languages: en