Protecting ITER walls: fast ion power loads in 3D magnetic field
Journal article, 2017
The fusion alpha and beam ion with steady-state power loads in all four main operating scenarios of ITER have been evaluated by the ASCOT code. For this purpose, high-fidelity magnetic backgrounds were reconstructed, taking into account even the internal structure of the ferritic inserts and tritium breeding modules (TBM). The beam ions were found to be almost perfectly confined in all scenarios, and only the so-called hybrid scenario featured alpha loads reaching 0.5 MW due to its more triangular plasma. The TBMs were not found to jeopardize the alpha confinement, nor cause any hot spots. Including plasma response did not bring dramatic changes to the load. The ELM control coils (ECC) were simulated in the baseline scenario and found to seriously deteriorate even the beam confinement. However, the edge perturbation in this case is so large that the sources have to be re-evaluated with plasma profiles that take into account the ECC perturbation.
non-axisymmetric magnetic field
3-dimensional wall
ITER power loads
TBM
test blanket modules
fast ion confinement
Author
Taina Kurki-Suonio
Chalmers, Physics, Subatomic and Plasma Physics
K. Sarkimaki
Aalto University
S. Akaslompolo
Max Planck Society
Aalto University
J. Varje
Aalto University
Y. Liu
Culham Science Centre
S. Sipila
Aalto University
O. Asunta
Aalto University
Tokamak Energy Ltd
E. Hirvijoki
Princeton University
A. Snicker
Max Planck Society
Aalto University
J. Terava
Aalto University
M. Cavinato
F4E
M. Gagliardi
F4E
V. Parail
Culham Science Centre
G. Saibene
F4E
Plasma Physics and Controlled Fusion
0741-3335 (ISSN) 1361-6587 (eISSN)
Vol. 59 1 014013Subject Categories (SSIF 2011)
Fusion, Plasma and Space Physics
DOI
10.1088/0741-3335/59/1/014013