http://www.cnr.it/ontology/cnr/individuo/prodotto/ID26075

H-mode pedestal scaling in DIII-D, ASDEX Upgrade, and JET (Articolo in rivista)

Type

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

Label

H-mode pedestal scaling in DIII-D, ASDEX Upgrade, and JET (Articolo in rivista) (literal)

Anno

2011-01-01T00:00:00+01:00 (literal)

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

10.1063/1.3593008 (literal)

Alternative label

M. N. A. Beurskens; T. H. Osborne; P. A. Schneider; E. Wolfrum; L. Frassinetti; R. Groebner; P. Lomas; I. Nunes; S. Saarelma; R. Scannell; P. B. Snyder; D. Zarzoso; I. Balboa; B. Bray; M. Brix; J. Flanagan; C. Giroud; E. Giovannozzi; M. Kempenaars; A. Loarte; E. de la Luna; G. Maddison; C. F. Maggi; D. McDonald; R. Pasqualotto; G. Saibene; R. Sartori; Emilia R. Solano; M. Walsh; L. Zabeo; the DIII-D Team, the ASDEX Upgrade Team, JET-EFDA Contributors (2011)
H-mode pedestal scaling in DIII-D, ASDEX Upgrade, and JET
in Physics of plasmas; American Institute of Physics, Melville [NY] (Stati Uniti d'America)
(literal)

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

M. N. A. Beurskens; T. H. Osborne; P. A. Schneider; E. Wolfrum; L. Frassinetti; R. Groebner; P. Lomas; I. Nunes; S. Saarelma; R. Scannell; P. B. Snyder; D. Zarzoso; I. Balboa; B. Bray; M. Brix; J. Flanagan; C. Giroud; E. Giovannozzi; M. Kempenaars; A. Loarte; E. de la Luna; G. Maddison; C. F. Maggi; D. McDonald; R. Pasqualotto; G. Saibene; R. Sartori; Emilia R. Solano; M. Walsh; L. Zabeo; the DIII-D Team, the ASDEX Upgrade Team, JET-EFDA Contributors (literal)

Pagina inizio

056120 (literal)

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Article Number: 056120 - La rivista è pubblicata anche online con ISSN 1089-7674 (literal)

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http://pop.aip.org/resource/1/phpaen/v18/i5/p056120_s1 (literal)

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18 (literal)

Rivista

Physics of plasmas (Rivista)

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Issue 5; Article Number 056120 (literal)

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11 (literal)

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5 (literal)

Note

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

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1 EURATOM/CCFE Fusion Association, Culham Science Centre, Abingdon OX14 3DB, United Kingdom; - 2 General Atomics, P.O. Box 85608, San Diego, California 92186-5608, USA; - 3 Association EURATOM-Max-Planck-Institut für Plasmaphysik, D-85748 Garching, Germany; - 4 Association EURATOM-VR, Alfven Laboratory, School of Electrical Engineering, KTH, Stockholm, Sweden; - 5 Centro de Fusao Nuclear, Associacao EURATOM-IST, Lisboa, Portugal; - 6 CEA, IRFM, F-13108 Saint Paul-lez-Durance, France; - 7 Associazione EURATOM-ENEA sulla Fusione, C.R. Frascati, Frascati, Italy; - 8 ITER Organization, CS 90 046, F-13067 Saint Paul lez Durance Cedex, France; - 9 Associacion EURATOM-CIEMAT para Fusion, Madrid, Spain; - 10 Associazione EURATOM-ENEA sulla Fusione, Consorzio RFX Padova, Italy; - 11 FUSION FOR ENERGY Joint Undertaking, 08019 Barcelona, Spain; - JET-EFDA, Culham Science Centre, Abingdon OX14 3DB, United Kingdom. (M. N. A. Beurskens1, T. H. Osborne2, P. A. Schneider3, E. Wolfrum3, L. Frassinetti4, R. Groebner2, P. Lomas1, I. Nunes5, S. Saarelma1, R. Scannell1, P. B. Snyder2, D. Zarzoso6, I. Balboa1, B. Bray2, M. Brix1, J. Flanagan1, C. Giroud1, E. Giovannozzi7, M. Kempenaars1, A. Loarte8, E. de la Luna9, G. Maddison1, C. F. Maggi3, D. McDonald1, R. Pasqualotto10, G. Saibene11, R. Sartori11, Emilia R. Solano9, M. Walsh8, L. Zabeo8, DIII-D Team, ASDEX Upgrade Team, and JET-EFDA Contributors) (literal)

Titolo

H-mode pedestal scaling in DIII-D, ASDEX Upgrade, and JET (literal)

Abstract

Multidevice pedestal scaling experiments in the DIII-D, ASDEX Upgrade (AUG), and JET tokamaks are presented in order to test two plasma physics pedestal width models. The first model proposes a scaling of the pedestal width Delta/a proportional to rho*(1/2) to rho* based on the radial extent of the pedestal being set by the point where the linear turbulence growth rate exceeds the E x B velocity. In the multidevice experiment where rho* at the pedestal top was varied by a factor of four while other dimensionless parameters where kept fixed, it has been observed that the temperature pedestal width in real space coordinates scales with machine size, and that therefore the gyroradius scaling suggested by the model is not supported by the experiments. The density pedestal width is not invariant with rho* which after comparison with a simple neutral fuelling model may be attributed to variations in the neutral fuelling patterns. The second model, EPED1, is based on kinetic ballooning modes setting the limit of the radial extent of the pedestal region and leads to Delta(psi) proportional to beta p(1/2). All three devices show a scaling of the pedestal width in normalised poloidal flux as Delta(psi) proportional to beta p(1/2), as described by the kinetic ballooning model; however, on JET and AUG, this could not be distinguished from an interpretation where the pedestal is fixed in real space. Pedestal data from all three devices have been compared with the predictive pedestal model EPED1 and the model produces pedestal height values that match the experimental data well. (literal)

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