ELM induced divertor heat loads on TCV

0322587 - ÚFP 2009 ES eng A - Abstract
Marki, J. - Pitts, R. A. - Horáček, Jan - Turri, G. - Tskhakaya, D. - TCV Team, T.
ELM induced divertor heat loads on TCV.
[Tepelný tok na divertor tokamaku TCV během ELMů.]
Book of Abstracts the 18th International Conference on Plasma Surface Interactions. Madrid: Centro de Investigaciones Energética Medioambiental y Tecnológica (CIEMAT), 2008. P1-41-P1-41. ISBN N.
[International Conference on Plasma Surface Interactions ,PSI 18/18th./. 26.05.2008-30.05.2008, Toledo]
Institutional research plan: CEZ:AV0Z20430508
Keywords : Tokamak TCV * divertor heat load * ELM
Subject RIV: BL - Plasma and Gas Discharge Physics
http://psi2008.ciemat.es/documents/Book_of_abstracts3.pdf

Fast infrared (IR) camera was used on the TCV tokamak to study energy deposition on the outer divertor target. THEODOR code was used to derive the heat flux from the IR surface temperature data in the presence of co-deposited layers. We observe that ELMs are composed of filaments with toroidal mode number between 5 and 15. Although not an ELM phenomena, an observation of strike point splitting in extremely low density L-mode plasmas will also be presented, believed to be due to field line ergodisation, probably due to mode activity.

Užitím rychlé infračervené kamery jsme studovali depozici tepla na vnější divertorové desce tokamaku TCV. Z tohoto 2D rozložení teploty jsme počítačovým modelem Theodor zrekonstruovali tepelný tok. Pozorovali jsme, že ELMy jsou opravdu tvořeny 5-15 filamenty. Navíc, pozorovali jsme zajímavé rozštěpení separatrix na divertoru pro velmi řídké plazma, pravděpodobně díky ergodizaci magnetické siločáry.
Permanent Link: http://hdl.handle.net/11104/0170795