DIFFER
DIFFER Publication

Power Exhaust scenarios for EU-DEMO

Label Value
Author
Abstract

We present an analysis of possible power exhaust scenarios for EU-DEMO. We employ the SOLPS-ITER code with the newly developed Advanced Fluid Neutral model to scan a relatively wide range of neutral pressure divertor and impurity concentration in the core to test the existence of a suitable finite-extension operational space. Ideally, such a region should provide low target power fluxes, negligible erosion, high He divertor compression, and low impurity core concentration. Within the approximations of our model, we identified a non empty region where this long set of constraints can be satisfied. Here we use the constraints rm{q_{max} \l e 10 MWm-2, rm{Z_{eff} \l e 1.2} and rm{T_{e} \l e 5} eV, the latter being a proxy for detachment. This region corresponds to an upstream density within the range rm{n_{e,up} = 0.5-0.7} \ rm {n e,GW} (large but not necessarily prohibitive), Ar separatrix concentration rm{\l e 10 -3 and divertor neutral pressure ranging from 40 to 50 Pa. This is encouraging, in view of a more detailed analysis to be performed on the best-performance area.

Year of Publication
2025
Journal
Nuclear Fusion
Volume
65
Number of Pages
in press
Publisher
IOP Publishing
DOI
PId
4776c8834f4464d19ec3ddfc0f9ce11d
Alternate Journal
Nucl. Fusion
Label
OA
Journal Article
Download citation