A two-term model of the confinement in Elmy H-modes using the global confinement and pedestal databases

J. G. Cordey; J. A. Snipes; M. Greenwald; F. Ryter; O. J.W.F. Kardaun; J. Stober; M. Valovic; A. Sykes; A. Dnestrovskij; M. Walsh; J. C. DeBoo; T. N. Carlstrom; G. Bracco; E. Righi; J. G. Cordey; K. Thomsen; D. McDonald; Y. Miura; K. Shinohara; K. Tsuzuki; T. Fukuda; Y. Kamada; T. Takizuka; H. Urano; S. M. Kaye; C. Bush; Y. Martin; A. Cote; G. Pacher; Jozef Ongena; S. Lebedev; A. Chudnovskiy; A. Hubbard; W. Suttrop; L. D. Horton; T. H. Osborne; G. Janeschitz; M. Sugihara; T. Hatae; Y. Kamada

doi:10.1088/0029-5515/43/8/305

A two-term model of the confinement in Elmy H-modes using the global confinement and pedestal databases

J. G. Cordey, J. A. Snipes, M. Greenwald, F. Ryter, O. J.W.F. Kardaun, J. Stober, M. Valovic, A. Sykes, A. Dnestrovskij, M. Walsh, J. C. DeBoo, T. N. Carlstrom, G. Bracco, E. Righi, J. G. Cordey, K. Thomsen, D. McDonald, Y. Miura, K. Shinohara, K. TsuzukiT. Fukuda, Y. Kamada, T. Takizuka, H. Urano, S. M. Kaye, C. Bush, Y. Martin, A. Cote, G. Pacher, Jozef Ongena, S. Lebedev, A. Chudnovskiy, A. Hubbard, W. Suttrop, L. D. Horton, T. H. Osborne, G. Janeschitz, M. Sugihara, T. Hatae, Y. Kamada

Laboratory for Plasma Physics

Culham Centre for Fusion Energy

Research output: Contribution to journal › Article › peer-review

Abstract

Two different physical models of the H-mode pedestal are tested against the joint pedestal-core database. The first is a confinement model in which the transport down the steep edge gradient is assumed to be dominated by thermal conduction. The second model is a magnetohydrodynamics (MHD) limit model in which it is assumed that the dominant loss mechanism is by the edge localized modes (ELMs), the pressure gradient being determined by a MHD stability limit. These models are then combined with models for the core and shown to give a good fit to the ELMy H-mode database. The resulting two-term scaling expressions are shown to give very similar predictions for the confinement time, in the next step machines ITER and FIRE, to that of the one-term model IPB98(y,2). The predicted stored energy in the pedestal is 28-50% of the total stored energy.

Original language	English
Pages (from-to)	670-674
Number of pages	5
Journal	Nuclear Fusion
Volume	43
Issue number	8
DOIs	https://doi.org/10.1088/0029-5515/43/8/305
Publication status	Published - Aug 2003

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Cordey, J. G., Snipes, J. A., Greenwald, M., Ryter, F., Kardaun, O. J. W. F., Stober, J., Valovic, M., Sykes, A., Dnestrovskij, A., Walsh, M., DeBoo, J. C., Carlstrom, T. N., Bracco, G., Righi, E., Cordey, J. G., Thomsen, K., McDonald, D., Miura, Y., Shinohara, K., ... Kamada, Y. (2003). A two-term model of the confinement in Elmy H-modes using the global confinement and pedestal databases. Nuclear Fusion, 43(8), 670-674. https://doi.org/10.1088/0029-5515/43/8/305

@article{392c184f4b5748b691cc8fc353496204,

title = "A two-term model of the confinement in Elmy H-modes using the global confinement and pedestal databases",

abstract = "Two different physical models of the H-mode pedestal are tested against the joint pedestal-core database. The first is a confinement model in which the transport down the steep edge gradient is assumed to be dominated by thermal conduction. The second model is a magnetohydrodynamics (MHD) limit model in which it is assumed that the dominant loss mechanism is by the edge localized modes (ELMs), the pressure gradient being determined by a MHD stability limit. These models are then combined with models for the core and shown to give a good fit to the ELMy H-mode database. The resulting two-term scaling expressions are shown to give very similar predictions for the confinement time, in the next step machines ITER and FIRE, to that of the one-term model IPB98(y,2). The predicted stored energy in the pedestal is 28-50\% of the total stored energy.",

author = "Cordey, \{J. G.\} and Snipes, \{J. A.\} and M. Greenwald and F. Ryter and Kardaun, \{O. J.W.F.\} and J. Stober and M. Valovic and A. Sykes and A. Dnestrovskij and M. Walsh and DeBoo, \{J. C.\} and Carlstrom, \{T. N.\} and G. Bracco and E. Righi and Cordey, \{J. G.\} and K. Thomsen and D. McDonald and Y. Miura and K. Shinohara and K. Tsuzuki and T. Fukuda and Y. Kamada and T. Takizuka and H. Urano and Kaye, \{S. M.\} and C. Bush and Y. Martin and A. Cote and G. Pacher and Jozef Ongena and S. Lebedev and A. Chudnovskiy and A. Hubbard and W. Suttrop and Horton, \{L. D.\} and Osborne, \{T. H.\} and G. Janeschitz and M. Sugihara and T. Hatae and Y. Kamada",

year = "2003",

month = aug,

doi = "10.1088/0029-5515/43/8/305",

language = "English",

volume = "43",

pages = "670--674",

journal = "Nuclear Fusion",

issn = "0029-5515",

number = "8",

}

Cordey, JG, Snipes, JA, Greenwald, M, Ryter, F, Kardaun, OJWF, Stober, J, Valovic, M, Sykes, A, Dnestrovskij, A, Walsh, M, DeBoo, JC, Carlstrom, TN, Bracco, G, Righi, E, Cordey, JG, Thomsen, K, McDonald, D, Miura, Y, Shinohara, K, Tsuzuki, K, Fukuda, T, Kamada, Y, Takizuka, T, Urano, H, Kaye, SM, Bush, C, Martin, Y, Cote, A, Pacher, G, Ongena, J, Lebedev, S, Chudnovskiy, A, Hubbard, A, Suttrop, W, Horton, LD, Osborne, TH, Janeschitz, G, Sugihara, M, Hatae, T & Kamada, Y 2003, 'A two-term model of the confinement in Elmy H-modes using the global confinement and pedestal databases', Nuclear Fusion, vol. 43, no. 8, pp. 670-674. https://doi.org/10.1088/0029-5515/43/8/305

TY - JOUR

T1 - A two-term model of the confinement in Elmy H-modes using the global confinement and pedestal databases

AU - Cordey, J. G.

AU - Snipes, J. A.

AU - Greenwald, M.

AU - Ryter, F.

AU - Kardaun, O. J.W.F.

AU - Stober, J.

AU - Valovic, M.

AU - Sykes, A.

AU - Dnestrovskij, A.

AU - Walsh, M.

AU - DeBoo, J. C.

AU - Carlstrom, T. N.

AU - Bracco, G.

AU - Righi, E.

AU - Cordey, J. G.

AU - Thomsen, K.

AU - McDonald, D.

AU - Miura, Y.

AU - Shinohara, K.

AU - Tsuzuki, K.

AU - Fukuda, T.

AU - Kamada, Y.

AU - Takizuka, T.

AU - Urano, H.

AU - Kaye, S. M.

AU - Bush, C.

AU - Martin, Y.

AU - Cote, A.

AU - Pacher, G.

AU - Ongena, Jozef

AU - Lebedev, S.

AU - Chudnovskiy, A.

AU - Hubbard, A.

AU - Suttrop, W.

AU - Horton, L. D.

AU - Osborne, T. H.

AU - Janeschitz, G.

AU - Sugihara, M.

AU - Hatae, T.

AU - Kamada, Y.

PY - 2003/8

Y1 - 2003/8

N2 - Two different physical models of the H-mode pedestal are tested against the joint pedestal-core database. The first is a confinement model in which the transport down the steep edge gradient is assumed to be dominated by thermal conduction. The second model is a magnetohydrodynamics (MHD) limit model in which it is assumed that the dominant loss mechanism is by the edge localized modes (ELMs), the pressure gradient being determined by a MHD stability limit. These models are then combined with models for the core and shown to give a good fit to the ELMy H-mode database. The resulting two-term scaling expressions are shown to give very similar predictions for the confinement time, in the next step machines ITER and FIRE, to that of the one-term model IPB98(y,2). The predicted stored energy in the pedestal is 28-50% of the total stored energy.

AB - Two different physical models of the H-mode pedestal are tested against the joint pedestal-core database. The first is a confinement model in which the transport down the steep edge gradient is assumed to be dominated by thermal conduction. The second model is a magnetohydrodynamics (MHD) limit model in which it is assumed that the dominant loss mechanism is by the edge localized modes (ELMs), the pressure gradient being determined by a MHD stability limit. These models are then combined with models for the core and shown to give a good fit to the ELMy H-mode database. The resulting two-term scaling expressions are shown to give very similar predictions for the confinement time, in the next step machines ITER and FIRE, to that of the one-term model IPB98(y,2). The predicted stored energy in the pedestal is 28-50% of the total stored energy.

UR - https://www.scopus.com/pages/publications/0042420265

U2 - 10.1088/0029-5515/43/8/305

DO - 10.1088/0029-5515/43/8/305

M3 - Article

AN - SCOPUS:0042420265

SN - 0029-5515

VL - 43

SP - 670

EP - 674

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 8

ER -

A two-term model of the confinement in Elmy H-modes using the global confinement and pedestal databases

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