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Abstract

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.

Additional information

Authors: FINKEN K H, Forschungszentrum Jülich GmbH, Institut für Plasmaphysik (DE);DIPPEL K H, Forschungszentrum Jülich GmbH, Institut für Plasmaphysik (DE);MANK G, Forschungszentrum Jülich GmbH, Institut für Plasmaphysik (DE);BAEK W Y, Physikalisch-Technische Bundesanstalt, Braunschweig (DE);BOEDO J A, University of California in Los Angeles, Institute of Plasma Fusion Research and Department of Mechanical, Aerospace and Nuclear Engineering (US);GRAY D S, University of California in Los Angeles, Institute of Plasma Fusion Research and Department of Mechanical, Aerospace and Nuclear Engineering (US)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 196-198 (1992) pp. 220-225
Record Number: 199310254 / Last updated on: 1994-11-29
Category: PUBLICATION
Original language: en
Available languages: en
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