SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport

Loading...
Thumbnail Image

Access rights

openAccess

URL

Journal Title

Journal ISSN

Volume Title

A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä

Date

2019-05-01

Major/Subject

Mcode

Degree programme

Language

en

Pages

8
279-286

Series

Nuclear Materials and Energy, Volume 19

Abstract

SOLPS 5.0 simulations assuming convection-dominated radial ion transport show qualitative and quantitative agreement with measurements of detached high-field side (HFS) divertor conditions for unseeded low-power L-mode plasmas in ASDEX Upgrade, while simultaneously maintaining a reasonable match to the density and temperature measurements at the low-field side (LFS) and HFS midplanes within the scatter of the data. The decreased diffusive transport from the high-density region in the HFS divertor volume across the separatrix into the core enables spatial extension of the high-density front to above the X-point in agreement with spectroscopic measurements. The suppressed ion fuelling from this region into the core plasma allows increasing the neutral D 2 fuelling to experimental levels, leading to agreement with the measured sub-divertor neutral fluxes within 30%. Detachment of the HFS divertor is observed as a significant decrease of the target ion flux and as reproduction of the characteristic roll-over behaviour of the integrated target ion current at increasing upstream density.

Description

| openaire: EC/H2020/633053/EU//EUROfusion

Keywords

Other note

Citation

Karhunen, J, Groth, M, Coster, D P, Carralero, D, Guimarais, L, Nikolaeva, V, Potzel, S, Pütterich, T, Reimold, F, Scarabosio, A, Viezzer, E, Wischmeier, M & ASDEX Upgrade Team 2019, ' SOLPS 5.0 simulations of the high-field side divertor detachment of L-mode plasmas in ASDEX upgrade with convection-dominated radial SOL transport ', Nuclear Materials and Energy, vol. 19, pp. 279-286 . https://doi.org/10.1016/j.nme.2019.02.040