Complete detachment has only been observed at the inner target in the boronized full-tungsten wall tokamak ASDEX Upgrade so far. Recently, stable H-Mode operation with a completely detached plasma at both divertor targets has been achieved by significant nitrogen seeding. The pressure loss along the field line exceeded a factor of ten and the power flux was effectively reduced to negligible levels at both targets simultaneously. Tungsten sputtering at the targets is strongly reduced during detached plasma operation.
This contribution will highlight the experimental results and show the accessible operational space for nitrogen induced detachment in H-Mode. Accompanying SOLPS-modeling of the detachment process will be presented.
|Title of host publication||DPG-Frühjahrstagung Jena 2013|
|Chapter||P: Fachverband Plasmaphysik|
|Publication status||Published - 2013|
|Event||DPG-Frühjahrstagung Jena 2013 - Jena, Germany|
Duration: 25 Feb 2013 → 1 Mar 2013
|Conference||DPG-Frühjahrstagung Jena 2013|
|Period||25/02/13 → 1/03/13|