Measurements of the edge power flow to the ALT-II limiter in TEXTOR
Thermographic measurements at the ALT-II pump limiter on TEXTOR have been performed. The design of the toroidal pump limiter provides a rather uniform temperature distribution and prevents an overheating of the graphite cover tiles. The local measurements of the convective energy flux to the limiter (IR scanner) and of the radiated power (bolometer) normally show a good power balance; this indicates that the power is leaving the plasma with toroidal symmetry. Analysis of the temperature distribution in poloidal and toroidal directions along the ALT-II tiles suggests a power decay length of 5-7 mm. At low plasma densities, the ion temperature is up to a factor of 2 higher than the electron temperature, and at high densities both temperatures converge to the same value.
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 196-198 (1992) pp. 220-225
Record Number: 199310254 / Last updated on: 1994-11-29
Original language: en
Available languages: en