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

Tutkimustuotos: Lehtiartikkelivertaisarvioitu

Tutkijat

Organisaatiot

  • Max-Planck-Institut für Plasmaphysik
  • CNR
  • University of Naples Federico II

Kuvaus

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/m 2 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.

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut1615-1619
Sivumäärä5
JulkaisuFusion Engineering and Design
Vuosikerta146
NumeroPart B
Varhainen verkossa julkaisun päivämäärä1 tammikuuta 2019
TilaJulkaistu - syyskuuta 2019
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

ID: 33415446