The toroidal pump limiter ALT-II in TEXTOR

Finken, K. H.; Reiter, D.; Doerner, R. P.; Goebel, D.; Nygren, E. R.; Watkins, J.; Dippel, K. H.; Corbett, W. J.; Noda, N.; Miyahara, A.; Wolf, H. G.; McGrath, R. T.; Hillis, D. L.; Matsunaga, M.; Shoji, T.; Conn, R. W.; Hogan, J.; Brooks, J. N.; Gray, D. S.; Kever, H.; Hobirk, J.; Denner, T.; Akaishi, K.; Boedo, J. A.; Sato, K. N.; Mank, G.; Moyer, R.

Journal Article

The toroidal pump limiter ALT-II in TEXTOR

Finken, K. H.FZJ* ; Reiter, D.FZJ* ; Denner, T.FZJ* ; Dippel, K. H.FZJ* ; Hobirk, J.FZJ* ; Mank, G.FZJ* ; Kever, H.FZJ* ; Wolf, H. G.FZJ* ; Noda, N. ; Miyahara, A. ; Shoji, T. ; Sato, K. N. ; Akaishi, K. ; Boedo, J. A. ; Brooks, J. N. ; Conn, R. W. ; Corbett, W. J. ; Doerner, R. P. ; Goebel, D. ; Gray, D. S. ; Hillis, D. L. ; Hogan, J. ; McGrath, R. T. ; Matsunaga, M. ; Moyer, R. ; Nygren, E. R. ; Watkins, J.

2005
American Nuclear Society La Grange Park, Ill.

Fusion science and technology 47, 126 - 137 (2005)

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Please use a persistent id in citations: http://hdl.handle.net/2128/2740

Abstract: The Advanced Limiter Test (ALT) project is the focus of a fruitful and intense International Energy Agreement collaboration on TEXTOR. The pump limiter is a mechanical boundary that is laid out for taking the full heat load of TEXTOR, namely 8 MW (assuming 2 MW radiated power)for 10 s, and provides a pumping efficiency of at least 5% of the working gas. This layout is adopted from the requirements of a fusion reactor: It is mandatory to remove both the full power that is convected to the limiter or divertor and the helium ash that is generated in the fusion process. In order to obtain pumping for all gases, the ALT-II is equipped with turbomolecular pumps. A short description of ALT-II is given, and the power and particle fluxes to the limiter surface and into the exhaust scoops are discussed. Requirements of the helium removal rate for a reactor and relevant measurements are discussed, and particle removal and the power distribution to the limiters are treated. Related topics of the ALT-II program were hydrogen recycling and the measurement of turbulence-induced anomalous particle transport in the plasma edge.

Keyword(s): J ; pump limiter (auto) ; particle exhaust (auto) ; power exhaust (auto)

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