http://www.cnr.it/ontology/cnr/individuo/prodotto/ID206556

Dependence of the density limit on the toroidal magnetic field on FTU (Articolo in rivista)

Type

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

Label

Dependence of the density limit on the toroidal magnetic field on FTU (Articolo in rivista) (literal)

Anno

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

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

10.1088/0029-5515/53/2/023007 (literal)

Alternative label

G. Pucella; O. Tudisco; M.L. Apicella; G. Apruzzese; G. Artaserse; F. Belli; W. Bin; L. Boncagni; A. Botrugno; P. Buratti; G. Calabrò; C. Castaldo; C. Cianfarani; V. Cocilovo; L. Dimatteo; B. Esposito; D. Frigione; L. Gabellieri; E. Giovannozzi; G. Granucci; M. Marinucci; D. Marocco; E. Martines; G. Mazzitelli; C. Mazzotta; S. Nowak; G. Ramogida; A. Romano; A.A. Tuccillo; L. Zeng; M. Zuin (2013)
Dependence of the density limit on the toroidal magnetic field on FTU
in Nuclear fusion; International Atomic Energy Agency, Vienna (Austria)
(literal)

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

G. Pucella; O. Tudisco; M.L. Apicella; G. Apruzzese; G. Artaserse; F. Belli; W. Bin; L. Boncagni; A. Botrugno; P. Buratti; G. Calabrò; C. Castaldo; C. Cianfarani; V. Cocilovo; L. Dimatteo; B. Esposito; D. Frigione; L. Gabellieri; E. Giovannozzi; G. Granucci; M. Marinucci; D. Marocco; E. Martines; G. Mazzitelli; C. Mazzotta; S. Nowak; G. Ramogida; A. Romano; A.A. Tuccillo; L. Zeng; M. Zuin (literal)

Pagina inizio

023007 (literal)

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Article Number: 023007; La rivista è pubblicata anche online con ISSN 1741-4326. (literal)

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http://iopscience.iop.org/0029-5515/53/2/023007/ (literal)

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53 (literal)

Rivista

Nuclear fusion (Rivista)

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7 (literal)

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2 (literal)

Note

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

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1 C.R. ENEA, Assoc. Euratom-ENEA, Via E. Fermi 45, I-00044 Frascati, Italy; 2 IFP-CNR, Assoc. Euratom-ENEA, Via R. Cozzi 53, I-20125 Milano, Italy; 3 Consorzio RFX, Assoc. Euratom-ENEA, Corso Stati Uniti 4, I-35127 Padova, Italy; 4 Institute of Plasma Phys., Chinese Academy of Sciences, Hefei, 230031, People's Republic of China. (G. Pucella 1, O. Tudisco 1, M.L. Apicella 1, G. Apruzzese 1, G. Artaserse 1, F. Belli 1, W. Bin 2, L. Boncagni 1, A. Botrugno 1, P. Buratti 1, G. Calabrò 1, C. Castaldo 1, C. Cianfarani 1, V. Cocilovo 1, L. Dimatteo 1, B. Esposito 1, D. Frigione 1, L. Gabellieri 1, E. Giovannozzi 1, G. Granucci 2, M. Marinucci 1, D. Marocco 1, E. Martines 3, G. Mazzitelli 1, C. Mazzotta 1, S. Nowak 2, G. Ramogida 1, A. Romano 1, A.A. Tuccillo 1, L. Zeng 4, M. Zuin 3) (literal)

Titolo

Dependence of the density limit on the toroidal magnetic field on FTU (literal)

Abstract

The capability of predicting the density limit of a magnetically confined burning plasma is of crucial importance to establish the ultimate performance of a fusion power plant. The Greenwald density limit, commonly used as an empirical scaling law, predicts that the maximum achievable central line-averaged density is given by the relation (n) over bar (G) = k (J) over bar, where (J) over bar is the average plasma current density and k is the plasma elongation. However, several experiments have pointed out that such a limit can be overcome in the presence of peaked density profiles. This paper proposes a new empirical scaling law for a limiter tokamak operating in the low-energy confinement mode (L-mode) concerning the case of peaked density profiles associated with the presence of multifaceted asymmetric radiation from the edges. This result is based on dedicated experiments performed on the Frascati Tokamak Upgrade (FTU) under extremely clean machine conditions (Z(eff) = 1.0-1.5), in which the high-density domain is explored in a wide range of values of plasma current (I-p = 500-900 kA) and toroidal magnetic field (B-T = 4-8 T). It is found that the maximum achievable central line-averaged density essentially depends on the toroidal magnetic field only and does not depend on the average plasma current density: the behaviour is explained in terms of density profile peaking in the high-density domain. As a confirmation that the limit is an edge limit, it is also shown that a Greenwald-like scaling (i.e. depending on the current density) actually holds for the edge line-averaged density (at r/a similar or equal to 4/5). (literal)

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