Abstract
We model the dissociation of injected methane (13CH4) and
nitrogen (15N2) molecules and the subsequent transport of
tracer ions in ASDEX Upgrade (AUG) low confinement
(L-mode) plasma conditions resembling a tracer injection
experiment conducted in 2011. Based on simulations with
the ERO code, the dissociation is predicted to occur
relatively close to the injection port in the
far-scrape-off layer (far-SOL) plasma with the
dissociation location moving closer to the injection
location with increasing plasma density and heating
power. Simulations of global transport of the tracer ions
resulting from the dissociation using the ASCOT code
predict that the decreasing penetration depth of the
molecules (dissociation in the far-SOL) increases the
ratio between main chamber and divertor deposition.
Original language | English |
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Article number | 095029 |
Journal | Plasma Physics and Controlled Fusion |
Volume | 56 |
Issue number | 9 |
DOIs | |
Publication status | Published - 2014 |
MoE publication type | A1 Journal article-refereed |
Keywords
- fusion energy
- plasma physics
- impurities
- methane
- nitrogen
- dissociation
- deposition