Nonaxisymmetric energy deposition pattern on ASDEX Upgrade divertor target 
plates during Type-I edge-localized modes

Eich, T.; Herrmann, A.; Neuhauser, J.; ASDEX Upgrade Team,

doi:10.1103/PhysRevLett.91.195003

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Nonaxisymmetric energy deposition pattern on ASDEX Upgrade divertor target plates during Type-I edge-localized modes

Eich, T., Herrmann, A., Neuhauser, J., & ASDEX Upgrade Team (2003). Nonaxisymmetric energy deposition pattern on ASDEX Upgrade divertor target plates during Type-I edge-localized modes. Physical Review Letters, 91(19): 195003. doi:10.1103/PhysRevLett.91.195003.

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Datensatz-Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-3C8A-A Versions-Permalink: https://hdl.handle.net/11858/00-001M-0000-0027-3C8B-8

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Urheber:
Eich, T.¹, Autor
Herrmann, A.¹, Autor
Neuhauser, J.², Autor
ASDEX Upgrade Team³, Autor

Affiliations:
1Experimental Plasma Physics 1 (E1), Max Planck Institute for Plasma Physics, Max Planck Society, ou_1856295
2External Organizations, ou_persistent22
3Max Planck Society, ou_persistent13

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Zusammenfassung: In the ASDEX Upgrade tokamak, complex power deposition structures on the divertor target plates during type-I edge-localized modes (ELMs) have been discovered by fast (few microseconds), two-dimensional (40×40 cm²) infrared thermography. In addition to the usual axisymmetric power deposition line near the separatrix, there appear, statistically distributed, several laterally displaced and inclined stripes, mostly well separated from each other and from the main strike zone. These structures are interpreted as footprints of approximately field aligned, helical perturbations at the low field side of the main plasma edge related to the nonlinear ELM evolution. Based on this picture, the ELM related mode structure can be derived from the target load pattern, yielding on average toroidal mode numbers in a range of 8–24.