This title appears in the Scientific Report :
2017
Please use the identifier:
http://dx.doi.org/10.1088/1741-4326/aa69dd in citations.
Please use the identifier: http://hdl.handle.net/2128/14737 in citations.
Impact of the JET ITER-like wall on H-mode plasma fueling
Impact of the JET ITER-like wall on H-mode plasma fueling
JET ITER-like wall (ILW) experiments show that the edge density evolution is strongly linked with the poloidal distribution of the ionization source. The fueling profile in the JET-ILW is more delocalized as compared to JET-C (JET with carbon-based plasma-facing components PFCs). Compared to JET-C t...
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Personal Name(s): | Wiesen, S. (Corresponding author) |
---|---|
Brezinsek, S. / Wischmeier, M. / De la Luna, E. / Groth, M. / Jaervinen, A. E. / de la Cal, E. / Losada, U. / de Aguilera, A. M. / Frassinetti, L. / Gao, Y. / Guillemaut, C. / Harting, D. / Meigs, A. / Schmid, K. / Sergienko, G. | |
Contributing Institute: |
Plasmaphysik; IEK-4 |
Published in: | Nuclear fusion, 57 (2017) 6, S. 066024 - |
Imprint: |
Vienna
IAEA
2017
|
DOI: |
10.1088/1741-4326/aa69dd |
Document Type: |
Journal Article |
Research Program: |
Plasma-Wall-Interaction |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
Please use the identifier: http://hdl.handle.net/2128/14737 in citations.
JET ITER-like wall (ILW) experiments show that the edge density evolution is strongly linked with the poloidal distribution of the ionization source. The fueling profile in the JET-ILW is more delocalized as compared to JET-C (JET with carbon-based plasma-facing components PFCs). Compared to JET-C the H-mode pedestal fueling cycle is dynamically influenced by a combination of plasma–wall interaction features, in particular: (1) edge-localized modes (ELMs) induced energetic particles are kinetically reflected on W divertor PFCs leading to distributed refueling away from the divertor depending on the divertor plasma configuration, (2) delayed molecular re-emission and outgassing of particles being trapped in W PFCs (bulk-W at the high field side and W-coated CFCs at the low field side) with different fuel content and (3) outgassing from Be co-deposits located on top of the high-field side baffle region shortly after the ELM. In view of the results of a set of well diagnosed series of JET-ILW type-I ELMy H-mode discharges with good statistics, the aforementioned effects are discussed in view of H-mode pedestal fueling capacity. The ongoing modelling activities with the focus on coupled core-edge plasma simulations and plasma–wall interaction are described and discussed also in view of possible code improvements required. |