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Numerical Modelling of Impurity Retention in the ITER Tokamak Scrape‐off Layer Plasma
Author(s) -
Zagórski R.
Publication year - 1993
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.2150330208
Subject(s) - divertor , tokamak , plasma , impurity , atomic physics , ion , hydrogen , materials science , sputtering , plasma parameters , physics , nuclear physics , nanotechnology , thin film , quantum mechanics
The hydrogen plasma and carbon ions flows generated at the target plates in the ITER tokamak scrape‐off layer are numerically investigated. A 2D model of hydrogen plasma and impurity ions is presented. The model is based on the electron‐ion Braginski fluid equations [1] for hydrogen plasma and rate equations for impurities. Arbitrary level of impurity ions concentration is assumed. Recycling of hydrogen, sputtering and self sputtering of carbon atoms at the target plates are taken into account. Equations of the model are solved in the slab geometry using 2D‐multifluid numerical code EPIT [2]. Problems of impurity ions retention and radiation in the divertor volume are analyzed. Results of calculations for ITER tokamak boundary plasma are presented, showing that poor retention is likely at high impurity concentration in the divertor volume. The radiation power can be a significant part of ingoing energy.