POWER FLUX AND SURFACE TEMPERATURE SIMULATIONS FOR THE JET MELTING EXPERIMENT DURING ELMs

0422246 - ÚFP 2014 BG eng C - Konferenční příspěvek (zahraniční konf.)
Dejarnac, Renaud - Podolník, Aleš - Komm, Michael
POWER FLUX AND SURFACE TEMPERATURE SIMULATIONS FOR THE JET MELTING EXPERIMENT DURING ELMs.
Proceedings of 18th International Summer School on Vacuum, Electron and Ion Technologies, Book of abstracts. Soyopol: INSTITUTE OF ELECTRONICS BULGARIAN ACADEMY OF SCIENCES, 2013.
[International Summer School on Vacuum, Electron and Ion Technologies/18./. Sozopol (BG), 07.10.2013-11.10.2013]
Institucionální podpora: RVO:61389021
Klíčová slova: tokamak * plasma wall interaction * tungsten * simulations
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech

Power fluxes falling on the divertor of tokamaks during ELMs are usually enormous and can cause irreversible damage, especially with metallic walls since melting is involved.ITER will be most probably equipped with a full tungsten divertor and this has recently lead to particular efforts from the fusion community to study the direct consequences of such.Here we present results of in-house 2D particle-in-cell (PIC) simulations giving power deposition profiles on a misaligned tile with respect to its neighbors.On one hand, the smoothing effect due to the Larmor gyration and the gap perturbation gives optimistic results on the tile side with a heat flux which is lower than the nominal parallel one.On the other hand, the fraction of the flux which does not reach the directly wetted side is transfered to the top of the tile.We have also developed at IPP Prague a 2D thermal code that solves the heat equation and which can read directly the numerical PIC profiles as an input.
Trvalý link: http://hdl.handle.net/11104/0228450