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Numerical Simulation of the ITER Gaseous Divertor with the B2.5 Code
Author(s) -
Ohtsu S.,
Tanaka S.,
Braams B. J.
Publication year - 1996
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.2150360234
Subject(s) - divertor , neon , helium , atomic physics , materials science , impurity , hydrogen , electron , plasma , electron temperature , physics , argon , nuclear physics , tokamak , quantum mechanics
Neon impurity behavior in the ITER gaseous target divertor was investigated numerically by a 2‐dimensional multifulid code (B2.5 code). The balance between neon gas puffing and particle pumping in the divertor region had a strong effect on electron energy cooling processes. With increasing puffing or decreasing pumping, the divertor plasma changed into a detached state. The electron cooling zone by neon impurity was distributed along the separatrix, while that by hydrogen and helium spread out from the striking point to the outer wall. A large flow circulation all over the edge region was driven by electron pressure gradient force. It was found that neon impurity flow in the private region had an important role for the electron cooling in the upstream region.