About: Characteristics of X-point lobe structures in single-null discharges on MAST

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	Lobe structures due to the application of resonant magnetic perturbations (RMPs) have been observed using wide-angle imaging of light from He1+ ions in the vicinity of the lower X-point in MAST. Above a threshold value the lobe structures extend radially, linearly with the coil current, both in L-mode and H-mode. After the application of the RMP, as the toroidal rotation in the confined plasma decreases, the lobes extend radially. This suggests the plasma is less effectively screening the RMP field. Comparing the imaging data with results from vacuum modelling shows that this technique can accurately predict the number and poloidal location of the lobes, but over-estimates their radial extent. More accurate estimates of the extent of the lobes can be made by accounting for plasma screening of the RMP field. Qualitative agreement between simulation and experiment is found if it is assumed that the RMP penetrates 2% in normalized radius from the last closed flux surface. Lobe structures due to the application of resonant magnetic perturbations (RMPs) have been observed using wide-angle imaging of light from He1+ ions in the vicinity of the lower X-point in MAST. Above a threshold value the lobe structures extend radially, linearly with the coil current, both in L-mode and H-mode. After the application of the RMP, as the toroidal rotation in the confined plasma decreases, the lobes extend radially. This suggests the plasma is less effectively screening the RMP field. Comparing the imaging data with results from vacuum modelling shows that this technique can accurately predict the number and poloidal location of the lobes, but over-estimates their radial extent. More accurate estimates of the extent of the lobes can be made by accounting for plasma screening of the RMP field. Qualitative agreement between simulation and experiment is found if it is assumed that the RMP penetrates 2% in normalized radius from the last closed flux surface. (en)
Title	Characteristics of X-point lobe structures in single-null discharges on MAST Characteristics of X-point lobe structures in single-null discharges on MAST (en)
skos:prefLabel	Characteristics of X-point lobe structures in single-null discharges on MAST Characteristics of X-point lobe structures in single-null discharges on MAST (en)
skos:notation	RIV/61389021:_____/14:00434796!RIV15-GA0-61389021
http://linked.open...avai/riv/aktivita	I P
http://linked.open...avai/riv/aktivity	I, P(GAP205/11/2341)
http://linked.open...iv/cisloPeriodika	6
http://linked.open...vai/riv/dodaniDat	2015
http://linked.open...aciTvurceVysledku	Cahyna, Pavel
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Ústav fyziky plazmatu AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	6912
http://linked.open...ai/riv/idVysledku	RIV/61389021:_____/14:00434796
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	tokamak; MAST; X-point; resonant magnetic perturbation (en)
http://linked.open.../riv/klicoveSlovo	tokamak MAST resonant magnetic perturbation X-point
http://linked.open...odStatuVydavatele	AT - Rakouská republika
http://linked.open...ontrolniKodProRIV	[BE2B252166DE]
http://linked.open...i/riv/nazevZdroje	Nuclear Fusion
http://linked.open...in/vavai/riv/obor	BL
http://linked.open...ichTvurcuVysledku	1 (xsd:int)
http://linked.open...cetTvurcuVysledku	7 (xsd:int)
http://linked.open...vavai/riv/projekt	Control of edge localized modes in tokamaks by external magnetic perturbations
http://linked.open...UplatneniVysledku	2014
http://linked.open...v/svazekPeriodika	54
http://linked.open...iv/tvurceVysledku	Liu, Y. Kirk, A. Cahyna, Pavel Nardon, E. Chapman, I. T. Harrison, J. R. Thornton, A. J.
http://linked.open...ain/vavai/riv/wos	000336893100016
issn	0029-5515
number of pages	9 (xsd:int)
http://bibframe.org/vocab/doi	10.1088/0029-5515/54/6/064015

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