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Conference Paper

Type-I ELM mode structure observed by divertor thermography in ASDEX Upgrade

MPS-Authors
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Eich,  T.
Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons109371

Herrmann,  A.
Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society;

/persons/resource/persons129913

Günter,  S.
Tokamak Theory (TOK), Max Planck Institute for Plasma Physics, Max Planck Society;

ASDEX Upgrade Team, 
Max Planck Society;

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P1_126.PDF
(Any fulltext), 693KB

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Citation

Eich, T., Herrmann, A., Neuhauser, J., Günter, S., & ASDEX Upgrade Team (2003). Type-I ELM mode structure observed by divertor thermography in ASDEX Upgrade. In R. Koch, & S. Lebedev (Eds.), 30th EPS Conference on Plasma Physics and Controlled Fusion. Geneva: European Physical Society.


Cite as: http://hdl.handle.net/11858/00-001M-0000-0027-3D63-7
Abstract
In the ASDEX Upgrade tokamak, power deposition structures on the outer divertor target surfaces during type-I Edge Localised Modes (ELMs) have been discovered by infra red thermography. These structures are radially and toroidally separated non-axisymmetric spirals. They are most obvious about 80 mm away from the toroidal symmetric strike zone on the target plates. The spiral structure of the power load is caused by a toroidally structured energy release in the outer midplane during the non-linear phase of a type-I ELM cycle as shown by basic field line tracing. The resulting structures correspond to values around z(m) n ≈ 12 and m ≈ 50 (for q95 ≈ 4).