Modern numerical methods for plasma tomography optimisation (Articolo in rivista)

Type
Label
  • Modern numerical methods for plasma tomography optimisation (Articolo in rivista) (literal)
Anno
  • 2012-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1016/j.nima.2012.05.063 (literal)
Alternative label
  • M. Odstrcil; J. Mlynar; T. Odstrcil; B. Alper; A. Murari (2012)
    Modern numerical methods for plasma tomography optimisation
    in NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT; ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS, AMSTERDAM (Paesi Bassi)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • M. Odstrcil; J. Mlynar; T. Odstrcil; B. Alper; A. Murari (literal)
Pagina inizio
  • 156 (literal)
Pagina fine
  • 161 (literal)
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  • La rivista è pubblicata anche online con ISSN 1872-9576. (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://www.sciencedirect.com/science/article/pii/S0168900212005712 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 686 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali
  • 6 (literal)
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  • - (literal)
Note
  • ISI Web of Science (WOS) (literal)
  • Scopu (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • a Association EURATOM-IPP.CR, FNSPE, Czech Technical University in Prague, CZ-115 19, Czech Republic; b Association EURATOM-IPP.CR, Institute of Plasma Physics AS CR, v.v.i., Za Slovankou 3, CZ-182 00 Praha 8, Czech Republic; c Association EURATOM-CCFE, Culham Science Centre, Abingdon OX14 3DB, UK; d Association EURATOM-ENEA sulla Fusione, Consorzio RFX, Corso Stati Uniti, 4, I-35127 Padova, Italy; e JET-EFDA, Culham Science Centre, Abingdon OX14 3DB, UK. (M. Odstrcil a,b,e, J. Mlynar b,e, T. Odstrcil a,e, B. Alper c,e, A. Murari d,e) (literal)
Titolo
  • Modern numerical methods for plasma tomography optimisation (literal)
Abstract
  • Tomography is a technique which is widely applied to fusion plasmas as it can provide improved understanding of plasma emissivity distributions. It is challenging because of the sparse nature of data available from the measured plasma projections. 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 tomographic algorithms. (literal)
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