http://www.cnr.it/ontology/cnr/individuo/prodotto/ID238466

Numerical verification of Orbit and Nemato codes for magnetic topology diagnosis (Articolo in rivista)

Type

Articolo in rivista (Classe)
Prodotto della ricerca (Classe)

Label

Numerical verification of Orbit and Nemato codes for magnetic topology diagnosis (Articolo in rivista) (literal)

Anno

2013-01-01T00:00:00+01:00 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi

10.1063/1.4811380 (literal)

Alternative label

G. Ciaccio; M. Veranda; D. Bonfiglio; S. Cappello; G. Spizzo; L. Chacon; R. B. White (2013)
Numerical verification of Orbit and Nemato codes for magnetic topology diagnosis
in Physics of plasmas; American Institute of Physics, Melville [NY] (Stati Uniti d'America)
(literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori

G. Ciaccio; M. Veranda; D. Bonfiglio; S. Cappello; G. Spizzo; L. Chacon; R. B. White (literal)

Pagina inizio

062505 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#altreInformazioni

Article number: 062505. La rivista è pubblicata anche online con ISSN 1089-7674. (literal)

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http://scitation.aip.org/content/aip/journal/pop/20/6/10.1063/1.4811380 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume

20 (literal)

Rivista

Physics of plasmas (Rivista)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#pagineTotali

12 (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo

6 (literal)

Note

ISI Web of Science (WOS) (literal)
Scopu (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

1,2 : Universit?à degli Studi di Padova, Padova, Italy; / 3,4,5 : Consorzio RFX, Euratom-ENEA Association, Corso Stati Uniti, 4, 35127 Padova, Italy; / 6 : Los Alamos National Laboratory, Los Alamos, NM 87545 USA; / 7 : Plasma Physics Laboratory, Princeton University, P.O. Box 451, Princeton, New Jersey 08543, USA. (literal)

Titolo

Numerical verification of Orbit and Nemato codes for magnetic topology diagnosis (literal)

Abstract

We present the results of a benchmark study involving the Orbit and Nemato codes. The two codes have been used to compare magnetic structure in a reversed-field pinch (RFP), where conserved magnetic structures/islands appear both in the core (dominated by m=1 modes) and in the edge (dominated by m=0 modes). As input, a snapshot of a 3D nonlinear MHD visco-resistive simulation (produced by the SpeCyl code) has been used. The first test is given by the reconstruction via Poincar?e surface of section plot of an island generated by a single mode. In this case, the magnetic field topology corresponds to a time-independent Hamiltonian and shows conserved flux-surfaces used as a reference. Both codes successfully yield field lines which follow the same flux surfaces, in both the m=1 and m=0 cases. The benchmark between the codes has then been extended to a more complex configuration with chaotic magnetic field, using as input a fully 3D multiple mode RFP condition, characterized by the typical chain of edge magnetic islands providing a transport barrier. Finally, a quantitative benchmark has been performed, using the same 3D input, by estimating the correlation length of the magnetic field line in a bounded stochastic domain. The conclusion is that both codes yield consistent Poincar?e plot structure on one hand, and very good quantitative agreement in correlation length estimate. This gives confidence to the application of both codes to magnetic topology in the RFX-mod device, for which they are used routinely, as well as for a generic fusion device. (literal)

Editore