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Modelling Efforts on the Helical Near Field Divertor of the Dynamic Ergodic Divertor (DED) for TEXTOR‐94
Author(s) -
Eich Th.,
Finken K. H.,
Kaleck A.
Publication year - 1998
Publication title -
contributions to plasma physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0863-1042
DOI - 10.1002/ctpp.2150380116
Subject(s) - divertor , field line , ergodic theory , plasma , physics , field (mathematics) , enhanced data rates for gsm evolution , magnetic field , flux (metallurgy) , computational physics , tokamak , materials science , computer science , nuclear physics , telecommunications , mathematics , mathematical analysis , quantum mechanics , pure mathematics , metallurgy
As a first step for the modelling of the plasma‐wall interaction of the proposed Dynamic Ergodic Divertor (DED) of TEXTOR‐94, the topology of the magnetic field lines of the divertor is analysed. Despite the strong ergodization, the magnetic field lines intersecting the wall in one poloidal turn form continuous sets. These sets are visualised by a 2‐D imaging technique; the field lines of each set of starting values is traced one poloidal turn clockwise and ctr. clockwise, marking those lines intersecting the wall. An overlay of the marked starting points defines areas with properties of a scrape‐off layer and areas with field lines ending on one side in the ergodic layer and one side on the wall. The edge plasma can be described by a 2‐D model; the model treats a part of the plasma as that of a conventional scrape‐off layer and another part with “half open” field lines connecting the divertor target plate with the ergodic layer. Calculations of the power flux distribution in the DED‐near field divertor are presented.