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


test blanket modules

fast ion confinement


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


M. Gagliardi


V. Parail

Culham Science Centre

G. Saibene


Plasma Physics and Controlled Fusion

0741-3335 (ISSN) 1361-6587 (eISSN)

Vol. 59 1

Subject Categories

Fusion, Plasma and Space Physics



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