Abstract
Carbon transport in the ASDEX Upgrade outer divertor plasma is
investigated in numerical simulations. The SOLPS5.0 code package is used
to model the scrape‐off layer plasma in a set of repeated
lower‐single‐null L‐mode discharges. Special emphasis is given to
replicate the plasma conditions measured in the full tungsten, vertical
outer target of ASDEX Upgrade, and solutions with and without the effect
of drifts are presented. First ERO simulations of hydrocarbon transport
in a SOLPS plasma background including drifts are carried out, and
significantly closer match to the experimental 13C deposition
pattern is obtained than with the solution without drifts. The 2D
divertor electric field predicted by SOLPS is applied to the ERO
modelling, and it is observed to result in a poloidal hydrocarbon drift
that agrees well with the experiment. An increased carbon deposition
efficiency, particularly upstream from the source, is obtained in the
normal ASDEX Upgrade field configuration.
| Original language | English |
|---|---|
| Pages (from-to) | 439-444 |
| Number of pages | 6 |
| Journal | Contributions to Plasma Physics |
| Volume | 50 |
| Issue number | 3-5 |
| DOIs | |
| Publication status | Published - 2010 |
| MoE publication type | A1 Journal article-refereed |
| Event | 12th International Workshop on Plasma Edge Theory in Fusion Devices, PET‐12 - Rostov, Russian Federation Duration: 2 Sept 2009 → 4 Sept 2009 |
Keywords
- Carbon
- impurity transport
- divertor
- SOLPS
- ERO
- drifts
- electric field
