http://www.cnr.it/ontology/cnr/individuo/prodotto/ID227343

Experimental and simulated argon spectra in the 2.3-3.4 nm region from tokamak plasmas (Articolo in rivista)

Type

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

Label

Experimental and simulated argon spectra in the 2.3-3.4 nm region from tokamak plasmas (Articolo in rivista) (literal)

Anno

2001-01-01T00:00:00+01:00 (literal)

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

10.1088/0953-4075/34/2/301 (literal)

Alternative label

Mattioli M.; Fournier KB.; Carraro L.; Coffey I.; Giroud C.; Lawson K.; Monier-Garbet P.; O'Mullane M.; Ongena J.; Puiatti ME.; Sattin F.; Scarin P.; Valisa M. (2001)
Experimental and simulated argon spectra in the 2.3-3.4 nm region from tokamak plasmas
in Journal of physics. B, Atomic molecular and optical physics (Print); IOP PUBLISHING LTD, BRISTOL BS1 6BE (Regno Unito)
(literal)

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

Mattioli M.; Fournier KB.; Carraro L.; Coffey I.; Giroud C.; Lawson K.; Monier-Garbet P.; O'Mullane M.; Ongena J.; Puiatti ME.; Sattin F.; Scarin P.; Valisa M. (literal)

Pagina inizio

127 (literal)

Pagina fine

142 (literal)

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

http://iopscience.iop.org/0953-4075/34/2/301/ (literal)

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

34 (literal)

Rivista

Journal of physics. B, Atomic molecular and optical physics (Rivista)

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

16 (literal)

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

2 (literal)

Note

ISI Web of Science (WOS) (literal)

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

1 JET Joint Undertaking, Abingdon, Oxfordshire OX14 3EA, UK 2 Consorzio RFX, Corso Stati Uniti 4, Padova I-35127, Italy 3 Lawrence Livermore National Laboratory, PO Box 808, L-41 Livermore, CA 94550, USA 4 Queen's University, Belfast BT7 1NN, UK 5 Association Euratom-CEA sur la Fusion, Centre d'Etudes de Cadarache, F-13108 St Paul-lez-Durance, France 6 UKEA-Euratom Fusion Association, Culham Laboratory Abingdon, Oxfordshire OX14 3EDB, UK 7 University of Strathclyde, Glasgow G4 0NG, UK 8 Euratom-Belgian State Association, Ecole Royal Militaire, Brussels B-1000, Belgium. (M Mattioli1,2, K B Fournier1,3, L Carraro1,2, I Coffey1,4, C Giroud1,5, K Lawson1,6, P Monier-Garbet1,5, M O' Mullane1,7, J Ongena1,8, M E Puiatti1,2, F Sattin1,2, P Scarin1,2 and M Valisa1,2) (literal)

Titolo

Experimental and simulated argon spectra in the 2.3-3.4 nm region from tokamak plasmas (literal)

Abstract

Experimental argon spectra in the 2.3-3.4 nm region from the Jet tokamak on a single null divertor configuration have been simulated. The spectra include lines from five ionization states, namely from Ar15+ Li-like to Ar11+ N-like ions. Collisional-radiative models have been constructed for these five Ar ions, considering electron collisional excitation and radiative decay as the populating processes of the excited states. These models give photon emission coefficients for the emitted lines at electron density and temperature values corresponding to the experimental situations. Impurity modelling is performed using a one-dimensional (1D) impurity transport code, calculating the steady-state radial distribution of the Ar ions. The Ar line brightnesses are evaluated in a post-processing subroutine and simulated spectra are obtained. The parts of the spectra corresponding to a single-ionization state do not depend on the experimental conditions and show good agreement except for the amplitude of the simulated 2s-3p Ar XVI line and the shape of the simulated 2.50 nm feature (composed of Ar XVI and Ar XV lines). On the other hand, the superposition of these spectra depends on the experimental conditions, as a consequence of the fact that the ion charge distribution depends not only on the radial profiles of the electron density and temperature, but also of the impurity transport coefficients. Simulations of the Ar spectra (including transport) give confidence in the atomic physics calculations; moreover, they allow the determination of the transport coefficients in the plasma region emitting the considered ionization states, i.e. at the interior of the last closed magnetic surface (LCMS). For a correct simulation of the amplitudes of the spectral features it is necessary to include a transport barrier inside the LCMS. As far as the atomic physics is concerned, we report improved wavelengths for Ar XV transitions and we benchmark photon emission coefficients for XUV transitions in highly ionized argon. (literal)

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