Number of the records: 1
MEMOS code validation on JET transient tungsten melting experiments
- 1.
SYSNO ASEP 0433550 Document Type A - Abstract R&D Document Type The record was not marked in the RIV R&D Document Type Není vybrán druh dokumentu Title MEMOS code validation on JET transient tungsten melting experiments Author(s) Bazylev, B. (DE)
Arnoux, G. (GB)
Coenen, J.W. (DE)
Matthews, G. F. (GB)
Mertens, Ph. (DE)
Knaup, M. (DE)
Jachmich, S. (BE)
Clever, M. (DE)
Dejarnac, Renaud (UFP-V) RID, ORCID
Coffey, I. (GB)
Corre, Y. (FR)
Devaux, S. (GB)
Gauthier, E. (FR)
Horáček, Jan (UFP-V) RID, ORCID
Krieger, K. (DE)
Marsen, S. (DE)
Meigs, A. (GB)
Pitts, R.A. (FR)
Puetterich, T. (DE)
Rack, M. (DE)
Stamp, M. (GB)
Sergienko, G. (DE)
Tamain, P. (FR)
Thompson, V. (GB)Number of authors 25 Source Title 21st International Conference on Plasma Surface Interactions 2014. - Toki City : National Institute for Fusion Science, 2014
P2-098-P2-098Number of pages 1 s. Publication form Print - P Action International Conference on Plasma Surface Interactions 2014/21./ Event date 26.05.2014-30.05.2014 VEvent location Kanazawa Country JP - Japan Event type WRD Language eng - English Country JP - Japan Keywords Heat loads ; misalignment ; JET ; tungsten ; melting ; MEMOS ; code Subject RIV BL - Plasma and Gas Discharge Physics Institutional support UFP-V - RVO:61389021 Annotation A new experiment has now been performed on JET, in which a deliberately misaligned lamella in the divertor has been used to perform controlled ELM transient melting. This paper reports on the application of the 3D MEMOS code to modelling of these experiments. Input heat loads are obtained from experimental data. During ELMing H-mode, the calculated time dependent, 3D temperature distributions in the special lamella lead to extremely high temperature gradients at the leading edge and noticeable W evaporation. Simulations demonstrate that consistency with the measured IR temperatures is only possible if the impinging heat flux is about a factor 3 lower than expected from geometrical considerations. Importantly, the code indicates that that shielding by the evaporated tungsten prevents bulk melting between ELMs. Encouragingly, the simulations are also able to quantitatively reproduce the dimensions of the damaged area. The principle mechanism responsible for the melting is Workplace Institute of Plasma Physics Contact Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Year of Publishing 2015
Number of the records: 1