Počet záznamů: 1
Edge localized mode rotation and the nonlinear dynamics of filaments
- 1.
SYSNO ASEP 0460362 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Edge localized mode rotation and the nonlinear dynamics of filaments Tvůrce(i) Morales, J.A. (FR)
Bécoulet, M. (FR)
Garbet, X. (FR)
Orain, F. (FR)
Dif-Pradalier, G. (FR)
Hoelzl, M. (DE)
Pamela, S. (GB)
Huijsmans, G.T.A. (FR)
Cahyna, Pavel (UFP-V) RID
Fil, A. (FR)
Nardon, E. (FR)
Passeron, C. (FR)
Latu, G. (FR)Číslo článku 042513 Zdroj.dok. Physics of Plasmas - ISSN 1070-664X
Roč. 23, č. 4 (2016)Poč.str. 8 s. Forma vydání Tištěná - P Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Edge Localized Modes (ELMs) ; MHD ; tokamak ; ITER Vědní obor RIV BL - Fyzika plazmatu a výboje v plynech Obor OECD Fluids and plasma physics (including surface physics) Institucionální podpora UFP-V - RVO:61389021 UT WOS 000375855500041 EID SCOPUS 84966263908 DOI 10.1063/1.4947201 Anotace Edge Localized Modes (ELMs) rotating precursors were reported few milliseconds before an ELM crash in several tokamak experiments. Also, the reversal of the filaments rotation at the ELM crash is commonly observed. In this article, we present a mathematical model that reproduces the rotation of the ELM precursors as well as the reversal of the filaments rotation at the ELM crash. Linear ballooning theory is used to establish a formula estimating the rotation velocity of ELM precursors. The linear study together with nonlinear magnetohydrodynamic simulations give an explanation to the rotations observed experimentally. Unstable ballooning modes, localized at the pedestal, grow and rotate in the electron diamagnetic direction in the laboratory reference frame. Approaching the ELM crash, this rotation decreases corresponding to the moment when the magnetic reconnection occurs. During the highly nonlinear ELM crash, the ELM filaments are cut from the main plasma due to the strong sheared mean flow that is nonlinearly generated via the Maxwell stress tensor. Pracoviště Ústav fyziky plazmatu Kontakt Vladimíra Kebza, kebza@ipp.cas.cz, Tel.: 266 052 975 Rok sběru 2017
Počet záznamů: 1