ELMs and asymmetries at the COMPASS-D boundary

Autor:	S.J. Fielding, M. G. Booth, Carlos A. Silva, K.B. Axon
Rok vydání:	1998
Předmět:	Physics Toroid Tokamak Plasma parameters Divertor media_common.quotation_subject Time evolution Plasma Condensed Matter Physics Asymmetry Computational physics Magnetic field law.invention Nuclear Energy and Engineering Physics::Plasma Physics law Atomic physics media_common
Zdroj:	Plasma Physics and Controlled Fusion. 40:1159-1170
ISSN:	1361-6587 0741-3335
DOI:	10.1088/0741-3335/40/6/019
Popis:	In this paper we report the effect of both edge localized modes (ELMs) and drifts on divertor plasma parameters in COMPASS-D. Profile changes during ELMs are measured with high spatial resolution, and power and particle losses per ELM are estimated. The time evolution of the divertor parameters is shown to be consistent with the ELM being associated with a fast collapse of the transport barrier. Asymmetries between inboard and outboard divertor targets in L-mode plasmas are shown to depend on the plasma parameters, in particular the direction of the toroidal magnetic field, the average plasma density and the input power. In general, the outer divertor region receives more power than the inner one, the asymmetry increasing for ion drift away from the X-point, contrary to observation in other devices. The drift together with scrape-off layer (SOL) currents are suggested as possible mechanisms causing the asymmetry.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::e9bb0464a32cf308d8116cc0e8807586 https://doi.org/10.1088/0741-3335/40/6/019 Zobrazit plný text záznamu