Sensitivity of fast ion losses to magnetic perturbations in the European DEMO

J. Varje; T. Kurki-Suonio; Antti Snicker; K. Särkimäki; P. Vincenzi; P. Agostinetti; E. Fable; P. Sonato; F. Villone

doi:10.1016/j.fusengdes.2019.03.001

Sensitivity of fast ion losses to magnetic perturbations in the European DEMO

J. Varje^*
, T. Kurki-Suonio
, Antti Snicker
, K. Särkimäki
, P. Vincenzi
, P. Agostinetti
, E. Fable
, P. Sonato
, F. Villone

^*Corresponding author for this work

Not published at VTT

Aalto University
Max-Planck-Institut für Plasmaphysik (IPP)
National Research Council (CNR)
University of Naples Federico II

Research output: Contribution to journal › Article › Scientific › peer-review

5 Citations (Scopus)

Abstract

The limits for the heat loads on the DEMO first wall are significantly stricter compared to those of ITER due to cooling and breeding blanket requirements. Fast particles in the form of NBI ions can escape the confinement due to magnetic perturbations and produce a significant power load on the first wall. In this contribution, we use the fast ion orbit-following code ASCOT to study NBI losses under the effects of 3D magnetic perturbations, including toroidal field ripple and ferritic inserts. The losses were found to not endanger the integrity of the wall, with loads remaining below 40 kW/m² even with unmitigated ripple, and losses did not increase above 2.5 % even with 16 toroidal field coils. Ionization in the scrape-off layer was not found to increase the losses significantly for realistic density profiles, and the design of the wall allows for some flexibility in the distance between the plasma and the first wall tiles.

Original language	English
Pages (from-to)	1615-1619
Journal	Fusion Engineering and Design
Volume	146
DOIs	https://doi.org/10.1016/j.fusengdes.2019.03.001
Publication status	Published - Sept 2019
MoE publication type	A1 Journal article-refereed

Funding

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014–2018 under grant agreement No 633053. This work was partially funded by the Academy of Finland project No. 259675 , and has also received funding from Tekes – the Finnish Funding Agency for Innovation under the FinnFusion Consortium. The work was carried out using the HELIOS supercomputer system at International Fusion Energy Research Centre, Aomori, Japan, under the Broader Approach collaboration between Euratom and Japan, implemented by Fusion for Energy and JAEA. Part of the work was carried out on the EUROfusion High Performance Computer (Marconi-Fusion). The supercomputing resources of CSC – IT center for science were utilised in the studies. Some of the calculations were performed using computer resources within the Aalto University School of Science “Science-IT” project.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Access to Document

10.1016/j.fusengdes.2019.03.001

Cite this

@article{410fee2408624c0ba16c074f8b1e23eb,

title = "Sensitivity of fast ion losses to magnetic perturbations in the European DEMO",

abstract = "The limits for the heat loads on the DEMO first wall are significantly stricter compared to those of ITER due to cooling and breeding blanket requirements. Fast particles in the form of NBI ions can escape the confinement due to magnetic perturbations and produce a significant power load on the first wall. In this contribution, we use the fast ion orbit-following code ASCOT to study NBI losses under the effects of 3D magnetic perturbations, including toroidal field ripple and ferritic inserts. The losses were found to not endanger the integrity of the wall, with loads remaining below 40 kW/m2 even with unmitigated ripple, and losses did not increase above 2.5 \% even with 16 toroidal field coils. Ionization in the scrape-off layer was not found to increase the losses significantly for realistic density profiles, and the design of the wall allows for some flexibility in the distance between the plasma and the first wall tiles.",

author = "J. Varje and T. Kurki-Suonio and Antti Snicker and K. S{\"a}rkim{\"a}ki and P. Vincenzi and P. Agostinetti and E. Fable and P. Sonato and F. Villone",

year = "2019",

month = sep,

doi = "10.1016/j.fusengdes.2019.03.001",

language = "English",

volume = "146",

pages = "1615--1619",

journal = "Fusion Engineering and Design",

issn = "0920-3796",

publisher = "Elsevier",

}

TY - JOUR

T1 - Sensitivity of fast ion losses to magnetic perturbations in the European DEMO

AU - Varje, J.

AU - Kurki-Suonio, T.

AU - Snicker, Antti

AU - Särkimäki, K.

AU - Vincenzi, P.

AU - Agostinetti, P.

AU - Fable, E.

AU - Sonato, P.

AU - Villone, F.

PY - 2019/9

Y1 - 2019/9

N2 - The limits for the heat loads on the DEMO first wall are significantly stricter compared to those of ITER due to cooling and breeding blanket requirements. Fast particles in the form of NBI ions can escape the confinement due to magnetic perturbations and produce a significant power load on the first wall. In this contribution, we use the fast ion orbit-following code ASCOT to study NBI losses under the effects of 3D magnetic perturbations, including toroidal field ripple and ferritic inserts. The losses were found to not endanger the integrity of the wall, with loads remaining below 40 kW/m2 even with unmitigated ripple, and losses did not increase above 2.5 % even with 16 toroidal field coils. Ionization in the scrape-off layer was not found to increase the losses significantly for realistic density profiles, and the design of the wall allows for some flexibility in the distance between the plasma and the first wall tiles.

AB - The limits for the heat loads on the DEMO first wall are significantly stricter compared to those of ITER due to cooling and breeding blanket requirements. Fast particles in the form of NBI ions can escape the confinement due to magnetic perturbations and produce a significant power load on the first wall. In this contribution, we use the fast ion orbit-following code ASCOT to study NBI losses under the effects of 3D magnetic perturbations, including toroidal field ripple and ferritic inserts. The losses were found to not endanger the integrity of the wall, with loads remaining below 40 kW/m2 even with unmitigated ripple, and losses did not increase above 2.5 % even with 16 toroidal field coils. Ionization in the scrape-off layer was not found to increase the losses significantly for realistic density profiles, and the design of the wall allows for some flexibility in the distance between the plasma and the first wall tiles.

UR - https://www.scopus.com/pages/publications/85063758452

U2 - 10.1016/j.fusengdes.2019.03.001

DO - 10.1016/j.fusengdes.2019.03.001

M3 - Article

AN - SCOPUS:85063758452

SN - 0920-3796

VL - 146

SP - 1615

EP - 1619

JO - Fusion Engineering and Design

JF - Fusion Engineering and Design

ER -

Sensitivity of fast ion losses to magnetic perturbations in the European DEMO

Abstract

Funding

UN SDGs

Access to Document

Other files and links

Fingerprint

Cite this