High performance H mode plasmas at densities above the Greenwald limit

M. A. Mahdavi; T. H. Osborne; A. W. Leonard; M. S. Chu; E. J. Doyle; M. E. Fenstermacher; G. R. McKee; G. M. Staebler; T. W. Petrie; M. R. Wade; S. L. Allen; J. A. Boedo; N. H. Brooks; R. J. Colchin; T. E. Evans; C. M. Greenfield; G. D. Porter; R. C. Isler; R. J. La Haye; C. J. Lasnier; R. Maingi; R. A. Moyer; M. J. Schaffer; P. G. Stangeby; J. G. Watkins; W. P. West; D. G. Whyte; N. S. Wolf

doi:10.1088/0029-5515/42/1/308

High performance H mode plasmas at densities above the Greenwald limit

M. A. Mahdavi, T. H. Osborne, A. W. Leonard, M. S. Chu, E. J. Doyle, M. E. Fenstermacher, G. R. McKee, G. M. Staebler, T. W. Petrie, M. R. Wade, S. L. Allen, J. A. Boedo, N. H. Brooks, R. J. Colchin, T. E. Evans, C. M. Greenfield, G. D. Porter, R. C. Isler, R. J. La Haye, C. J. LasnierR. Maingi, R. A. Moyer, M. J. Schaffer, P. G. Stangeby, J. G. Watkins, W. P. West, D. G. Whyte, N. S. Wolf

Fusion and Fission Energy and Science Di

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Abstract

Densities of up to 40% above the Greenwald limit are reproducibly achieved in high confinement (H_ITER89P = 2) ELMing H mode discharges. Simultaneous gas fuelling and divertor pumping were used to obtain these results. Confinement of these discharges, similar to moderate density H mode, is characterized by a stiff temperature profile, and is therefore sensitive to the density profile. A particle transport model is presented that explains the roles of divertor pumping and geometry for access to high densities. The energy loss per ELM at high density is a factor of five lower than the predictions of an earlier scaling, based on data from lower density discharges.

Original language	English
Pages (from-to)	52-58
Number of pages	7
Journal	Nuclear Fusion
Volume	42
Issue number	1
DOIs	https://doi.org/10.1088/0029-5515/42/1/308
State	Published - Jan 2002

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Mahdavi, M. A., Osborne, T. H., Leonard, A. W., Chu, M. S., Doyle, E. J., Fenstermacher, M. E., McKee, G. R., Staebler, G. M., Petrie, T. W., Wade, M. R., Allen, S. L., Boedo, J. A., Brooks, N. H., Colchin, R. J., Evans, T. E., Greenfield, C. M., Porter, G. D., Isler, R. C., La Haye, R. J., ... Wolf, N. S. (2002). High performance H mode plasmas at densities above the Greenwald limit. Nuclear Fusion, 42(1), 52-58. https://doi.org/10.1088/0029-5515/42/1/308

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title = "High performance H mode plasmas at densities above the Greenwald limit",

abstract = "Densities of up to 40% above the Greenwald limit are reproducibly achieved in high confinement (HITER89P = 2) ELMing H mode discharges. Simultaneous gas fuelling and divertor pumping were used to obtain these results. Confinement of these discharges, similar to moderate density H mode, is characterized by a stiff temperature profile, and is therefore sensitive to the density profile. A particle transport model is presented that explains the roles of divertor pumping and geometry for access to high densities. The energy loss per ELM at high density is a factor of five lower than the predictions of an earlier scaling, based on data from lower density discharges.",

author = "Mahdavi, {M. A.} and Osborne, {T. H.} and Leonard, {A. W.} and Chu, {M. S.} and Doyle, {E. J.} and Fenstermacher, {M. E.} and McKee, {G. R.} and Staebler, {G. M.} and Petrie, {T. W.} and Wade, {M. R.} and Allen, {S. L.} and Boedo, {J. A.} and Brooks, {N. H.} and Colchin, {R. J.} and Evans, {T. E.} and Greenfield, {C. M.} and Porter, {G. D.} and Isler, {R. C.} and {La Haye}, {R. J.} and Lasnier, {C. J.} and R. Maingi and Moyer, {R. A.} and Schaffer, {M. J.} and Stangeby, {P. G.} and Watkins, {J. G.} and West, {W. P.} and Whyte, {D. G.} and Wolf, {N. S.}",

year = "2002",

month = jan,

doi = "10.1088/0029-5515/42/1/308",

language = "English",

volume = "42",

pages = "52--58",

journal = "Nuclear Fusion",

issn = "0029-5515",

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Mahdavi, MA, Osborne, TH, Leonard, AW, Chu, MS, Doyle, EJ, Fenstermacher, ME, McKee, GR, Staebler, GM, Petrie, TW, Wade, MR, Allen, SL, Boedo, JA, Brooks, NH, Colchin, RJ, Evans, TE, Greenfield, CM, Porter, GD, Isler, RC, La Haye, RJ, Lasnier, CJ, Maingi, R, Moyer, RA, Schaffer, MJ, Stangeby, PG, Watkins, JG, West, WP, Whyte, DG & Wolf, NS 2002, 'High performance H mode plasmas at densities above the Greenwald limit', Nuclear Fusion, vol. 42, no. 1, pp. 52-58. https://doi.org/10.1088/0029-5515/42/1/308

TY - JOUR

T1 - High performance H mode plasmas at densities above the Greenwald limit

AU - Mahdavi, M. A.

AU - Osborne, T. H.

AU - Leonard, A. W.

AU - Chu, M. S.

AU - Doyle, E. J.

AU - Fenstermacher, M. E.

AU - McKee, G. R.

AU - Staebler, G. M.

AU - Petrie, T. W.

AU - Wade, M. R.

AU - Allen, S. L.

AU - Boedo, J. A.

AU - Brooks, N. H.

AU - Colchin, R. J.

AU - Evans, T. E.

AU - Greenfield, C. M.

AU - Porter, G. D.

AU - Isler, R. C.

AU - La Haye, R. J.

AU - Lasnier, C. J.

AU - Maingi, R.

AU - Moyer, R. A.

AU - Schaffer, M. J.

AU - Stangeby, P. G.

AU - Watkins, J. G.

AU - West, W. P.

AU - Whyte, D. G.

AU - Wolf, N. S.

PY - 2002/1

Y1 - 2002/1

N2 - Densities of up to 40% above the Greenwald limit are reproducibly achieved in high confinement (HITER89P = 2) ELMing H mode discharges. Simultaneous gas fuelling and divertor pumping were used to obtain these results. Confinement of these discharges, similar to moderate density H mode, is characterized by a stiff temperature profile, and is therefore sensitive to the density profile. A particle transport model is presented that explains the roles of divertor pumping and geometry for access to high densities. The energy loss per ELM at high density is a factor of five lower than the predictions of an earlier scaling, based on data from lower density discharges.

AB - Densities of up to 40% above the Greenwald limit are reproducibly achieved in high confinement (HITER89P = 2) ELMing H mode discharges. Simultaneous gas fuelling and divertor pumping were used to obtain these results. Confinement of these discharges, similar to moderate density H mode, is characterized by a stiff temperature profile, and is therefore sensitive to the density profile. A particle transport model is presented that explains the roles of divertor pumping and geometry for access to high densities. The energy loss per ELM at high density is a factor of five lower than the predictions of an earlier scaling, based on data from lower density discharges.

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DO - 10.1088/0029-5515/42/1/308

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AN - SCOPUS:0036120366

SN - 0029-5515

VL - 42

SP - 52

EP - 58

JO - Nuclear Fusion

JF - Nuclear Fusion

IS - 1

ER -

High performance H mode plasmas at densities above the Greenwald limit

Abstract

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