This title appears in the Scientific Report :
2021
Please use the identifier:
http://hdl.handle.net/2128/29732 in citations.
Please use the identifier: http://dx.doi.org/10.1016/j.nme.2021.100926 in citations.
Towards assessment of plasma edge transport in Neon seeded plasmas in disconnected double null configuration in EAST with SOLPS-ITER
Towards assessment of plasma edge transport in Neon seeded plasmas in disconnected double null configuration in EAST with SOLPS-ITER
Energy dissipation in the plasma edge is key for future tokamaks. The potential of neon as radiating seeding species in disconnected double null (DDN) configuration is assessed in EAST discharges in high confinement mode (H-mode). As the separation between the two separatrices in the studied DDN dis...
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Personal Name(s): | Boeyaert, D. |
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Wiesen, S. (Corresponding author) / Wischmeier, M. / Dekeyser, W. / Carli, S. / Wang, L. / Ding, F. / Li, K. / Liang, Yunfeng / Baelmans, M. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Nuclear materials and energy, 26 (2021) S. 100926 - |
Imprint: |
Amsterdam [u.a.]
Elsevier
2021
|
DOI: |
10.1016/j.nme.2021.100926 |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wand-Wechselwirkung |
Link: |
OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://dx.doi.org/10.1016/j.nme.2021.100926 in citations.
Energy dissipation in the plasma edge is key for future tokamaks. The potential of neon as radiating seeding species in disconnected double null (DDN) configuration is assessed in EAST discharges in high confinement mode (H-mode). As the separation between the two separatrices in the studied DDN discharges is minimum 1.5 cm, the configuration is effectively a single null configuration, and the benefits of the double null topology are minimal. Neon seeding, on the other hand, has a favourable effect: both the target heat flux and the divertor temperature decrease more than five-fold with increased seeding rate in high-recycling conditions. Interpretive edge plasma simulations with SOLPS-ITER in support of ongoing transport analysis are presented. For the unseeded case the numerical results agree with the experimental data within a factor two for the target temperature conditions and measured neutral pressures in the active divertor. The key for achieving good agreement is a suitable selection of coefficients for anomalous transport and neutral conductances between the upper cryopump and the main chamber. |