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The ALT-II pump limiter is an axisymmetric toroidal belt installed in the TEXTOR tokamak with the objectives of optimising plasma performance and studying the physics of particle removal, recycling and impurity control with large area limiters in tokamaks. In this paper, the first results from ALT-II experiments are reported. After a description of the belt pump limiter configuration, the plasma performance and recycling conditions achieved on the limiter are presented. The difference in the scrape off layer (SOL) between the belt limiter and modular limiters as they affect particle removal, and the heat distribution on the blades, are discussed. Finally, the particle removal capability of ALT-II in ohmic and ICRH discharges is presented, based on pumping experiments at two of the blades.

Additional information

Authors: GOEBEL D M, University of California, Los Angeles (US);CONN R W, University of California, Los Angeles (US);CORBETT W J, University of California, Los Angeles (US);MOYER R, University of California, Los Angeles (US);FINKEN K H, Kernforschungsanlage Jülich GmbH (DE);DIPPEL K H, Kernforschungsanlage Jülich GmbH (DE);HARDTKE A, Kernforschungsanlage Jülich GmbH (DE);KOSKI J A, Sandia National Laboratories, Albuquerque (US);GAUSTER W B, Sandia National Laboratories, Albuquerque (US);ET AL., Sandia National Laboratories, Albuquerque (US)
Bibliographic Reference: Article: Journal of Nuclear Materials, Vol. 162-164 (1989), pp. 115-127
Record Number: 199010403 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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