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Statements

Subject Item
n2:RIV%2F61389021%3A_____%2F12%3A00383250%21RIV13-GA0-61389021
rdf:type
n7:Vysledek skos:Concept
dcterms:description
Tomography is a technique which is widely applied to fusion plasmas as it can provide improved understanding of plasma emissivity distributions. An optimised version of robust and fast tomographic algorithm based on the Tikhonov regularisation constrained to Minimum Fisher Information is presented in this contribution. A new regularisation matrix enforcing preferential emissivity smoothness along magnetic flux surfaces is introduced. The paper also details application of advanced numerical methods which lead to a substantial decrease in computation time. Subsequent implementation of fast presolvers of the inverse problem further contributes to the algorithm’s efficiency and also an improved stability of the tomography reconstruction. Finally, reliability and performance of the tomography algorithm is exemplified by the reconstruction of soft X-ray data evolution following tungsten ablation into a JET plasma. The resulting speed of reconstruction is compared to other referenced Tomography is a technique which is widely applied to fusion plasmas as it can provide improved understanding of plasma emissivity distributions. An optimised version of robust and fast tomographic algorithm based on the Tikhonov regularisation constrained to Minimum Fisher Information is presented in this contribution. A new regularisation matrix enforcing preferential emissivity smoothness along magnetic flux surfaces is introduced. The paper also details application of advanced numerical methods which lead to a substantial decrease in computation time. Subsequent implementation of fast presolvers of the inverse problem further contributes to the algorithm’s efficiency and also an improved stability of the tomography reconstruction. Finally, reliability and performance of the tomography algorithm is exemplified by the reconstruction of soft X-ray data evolution following tungsten ablation into a JET plasma. The resulting speed of reconstruction is compared to other referenced
dcterms:title
Modern numerical methods for plasma tomography optimisation Modern numerical methods for plasma tomography optimisation
skos:prefLabel
Modern numerical methods for plasma tomography optimisation Modern numerical methods for plasma tomography optimisation
skos:notation
RIV/61389021:_____/12:00383250!RIV13-GA0-61389021
n7:predkladatel
n8:ico%3A61389021
n3:aktivita
n9:S n9:P n9:Z
n3:aktivity
P(GAP205/10/2055), P(LG11018), S, Z(AV0Z20430508)
n3:cisloPeriodika
9
n3:dodaniDat
n19:2013
n3:domaciTvurceVysledku
n6:9507507 n6:9079831
n3:druhVysledku
n11:J
n3:duvernostUdaju
n15:S
n3:entitaPredkladatele
n20:predkladatel
n3:idSjednocenehoVysledku
151295
n3:idVysledku
RIV/61389021:_____/12:00383250
n3:jazykVysledku
n18:eng
n3:klicovaSlova
Soft X-rays; Tomography; Fusion plasmas; Imaging; MFI; Tokamak
n3:klicoveSlovo
n5:Tomography n5:Fusion%20plasmas n5:Imaging n5:Tokamak n5:Soft%20X-rays n5:MFI
n3:kodStatuVydavatele
NL - Nizozemsko
n3:kontrolniKodProRIV
[278BC32E96B4]
n3:nazevZdroje
Nuclear Instruments & Methods in Physics Research Section A
n3:obor
n17:BL
n3:pocetDomacichTvurcuVysledku
2
n3:pocetTvurcuVysledku
5
n3:projekt
n4:GAP205%2F10%2F2055 n4:LG11018
n3:rokUplatneniVysledku
n19:2012
n3:svazekPeriodika
686
n3:tvurceVysledku
Alper, B. Odstrčil, Michal Mlynář, Jan Odstrčil, T. Murari, A.
n3:wos
000307091100023
n3:zamer
n14:AV0Z20430508
s:issn
0168-9002
s:numberOfPages
6
n16:doi
10.1016/j.nima.2012.05.063