The Toroidal Pump Limiter ALT-II in TEXTOR

Journal Article · Tue Feb 15 04:00:00 EST 2005 · Fusion Science and Technology

OSTI ID:20849873

Finken, K H ^[1]; Reiter, D ^[1]; Denner, T ^[1]

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1. Institut fuer Plasmaphysik, Forschungszentrum Juelich GmbH (Germany)

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.

• OSTI ID: 20849873
• Journal Information: Fusion Science and Technology, Journal Name: Fusion Science and Technology Journal Issue: 2 Vol. 47; ISSN 1536-1055
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
DIVERTORS
EFFICIENCY
HEATING LOAD
HELIUM
HELIUM ASH
HYDROGEN
PLASMA
POWER DISTRIBUTION
PUMPED LIMITERS
RADIATION TRANSPORT
SURFACES
TEXTOR TOKAMAK
THERMONUCLEAR REACTORS
TURBOMOLECULAR PUMPS
TURBULENCE