Background and Initial Experiments with the Dynamic Ergodic Divertor on TEXTOR

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

OSTI ID:20849869

Finken, K H ^[1]; Abdullaev, S S ^[1]; Bock, M F.M. de ^[2]

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1. Institut fuer Plasmaphysik, Forschungszentrum Juelich GmbH, EURATOM Association (Germany)
2. FOM-Institute for Plasma Physics Rijnhuizen, Association EURATOM-FOM (Netherlands)

Recently, the Dynamic Ergodic Divertor (DED) with 18 helically wound coils at the high field side has been installed on TEXTOR. The DED allows static and dynamic operation up to 10 kHz. The specific features of ergodization and the open laminar zone are discussed. The dynamic feature leads to induced electrical currents and to a force transfer from the external coils to the plasma. The structures due to the DED near field are described, which result in a stripelike pattern seen both in the light of recycling particles (H{sub {alpha}}, impurities) and in the heat deposition pattern. The ergodization leads either to an enhanced plasma rotation - probably due to edge electric fields - or to a reduction of the central rotation if a tearing mode is excited; the result depends on the sense of DED rotation.

• OSTI ID: 20849869
• 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
ELECTRIC CURRENTS
ELECTRIC FIELDS
ERGODIC DIVERTORS
KHZ RANGE
OPERATION
PLASMA
PLASMA IMPURITIES
ROTATION
TEARING INSTABILITY
TEXTOR TOKAMAK