Open AccessEMC3–EIRENE simulations of neon impurity seeding effects on heat flux distribution on CFETR
Author(s) -
Shuyu Dai,
Defeng Kong,
V. S. Chan,
Liang Wang,
Y. Feng,
Dezhen Wang
Publication year - 2022
Publication title -
nuclear fusion
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.774
H-Index - 120
eISSN - 1741-4326
pISSN - 0029-5515
DOI - 10.1088/1741-4326/ac47b5
Subject(s) - divertor , neon , heat flux , toroid , seeding , materials science , impurity , flux (metallurgy) , atomic physics , plasma , fusion power , tokamak , helium , torus , mechanics , nuclear engineering , physics , thermodynamics , nuclear physics , heat transfer , quantum mechanics , argon , metallurgy , geometry , mathematics , engineering
The numerical modelling of the heat flux distribution with neon impurity seeding on China fusion engineering test reactor has been performed by the three-dimensional (3D) edge transport code EMC3–EIRENE. The maximum heat flux on divertor targets is about 18 MW m −2 without impurity seeding under the input power of 200 MW entering into the scrape-off layer. In order to mitigate the heat loads below 10 MW m −2 , neon impurity seeded at different poloidal positions has been investigated to understand the properties of impurity concentration and heat load distributions for a single toroidal injection location. The majority of the studied neon injections gives rise to a toroidally asymmetric profile of heat load deposition on the in- or out-board divertor targets. The heat loads cannot be reduced below 10 MW m −2 along the whole torus for a single toroidal injection location. In order to achieve the heat load mitigation (<10 MW m −2 ) along the entire torus, modelling of sole and simultaneous multi-toroidal neon injections near the in- and out-board strike points has been stimulated, which indicates that the simultaneous multi-toroidal neon injections show a better heat flux mitigation on both in- and out-board divertor targets. The maximum heat flux can be reduced below 7 MW m −2 on divertor targets for the studied scenarios of the simultaneous multi-toroidal neon injections.