Peaked density profiles in circular-limiter H modes on the TFTR tokamak

C. E. Bush; Robert James Goldston; S. D. Scott; E. D. Fredrickson; K. McGuire; J. Schivell; G. Taylor; Cris W. Barnes; M. G. Bell; R. L. Boivin; N. Bretz; R. V. Budny; A. Cavallo; P. C. Efthimion; B. Grek; R. Hawryluk; K. Hill; R. A. Hulse; A. Janos; D. W. Johnson; S. Kilpatrick; D. M. Manos; D. K. Mansfield; D. M. Meade; H. Park; A. T. Ramsey; B. Stratton; E. J. Synakowski; H. H. Towner; R. M. Wieland; M. C. Zarnstorff; S. Zweben

doi:10.1103/PhysRevLett.65.424

Peaked density profiles in circular-limiter H modes on the TFTR tokamak

C. E. Bush, Robert James Goldston, S. D. Scott, E. D. Fredrickson, K. McGuire, J. Schivell, G. Taylor, Cris W. Barnes, M. G. Bell, R. L. Boivin, N. Bretz, R. V. Budny, A. Cavallo, P. C. Efthimion, B. Grek, R. Hawryluk, K. Hill, R. A. Hulse, A. Janos, D. W. JohnsonS. Kilpatrick, D. M. Manos, D. K. Mansfield, D. M. Meade, H. Park, A. T. Ramsey, B. Stratton, E. J. Synakowski, H. H. Towner, R. M. Wieland, M. C. Zarnstorff, S. Zweben

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Abstract

Circular-limiter H modes are obtained on the TFTR tokamak during high-power neutral-beam heating. The transition is usually from the supershot to the H mode rather than the usual L to H transition, and thus is obtained in a low-recycling environment with core fueling mainly from the heating beams. As a result, the density and pressure profiles are highly peaked at the center. The global confinement time E is enhanced over L-mode scaling by up to 2.5 times. The onset of edge-localized MHD modes shortly after the H-mode transition appears to limit E. Limiter H modes of up to 1.5 s duration have been realized.

Original language	English (US)
Pages (from-to)	424-427
Number of pages	4
Journal	Physical review letters
Volume	65
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevLett.65.424
State	Published - 1990

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.65.424

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Bush, C. E., Goldston, R. J., Scott, S. D., Fredrickson, E. D., McGuire, K., Schivell, J., Taylor, G., Barnes, C. W., Bell, M. G., Boivin, R. L., Bretz, N., Budny, R. V., Cavallo, A., Efthimion, P. C., Grek, B., Hawryluk, R., Hill, K., Hulse, R. A., Janos, A., ... Zweben, S. (1990). Peaked density profiles in circular-limiter H modes on the TFTR tokamak. Physical review letters, 65(4), 424-427. https://doi.org/10.1103/PhysRevLett.65.424

@article{dfad9705a5074083b3ec95ca551b0468,

title = "Peaked density profiles in circular-limiter H modes on the TFTR tokamak",

abstract = "Circular-limiter H modes are obtained on the TFTR tokamak during high-power neutral-beam heating. The transition is usually from the supershot to the H mode rather than the usual L to H transition, and thus is obtained in a low-recycling environment with core fueling mainly from the heating beams. As a result, the density and pressure profiles are highly peaked at the center. The global confinement time E is enhanced over L-mode scaling by up to 2.5 times. The onset of edge-localized MHD modes shortly after the H-mode transition appears to limit E. Limiter H modes of up to 1.5 s duration have been realized.",

author = "Bush, \{C. E.\} and Goldston, \{Robert James\} and Scott, \{S. D.\} and Fredrickson, \{E. D.\} and K. McGuire and J. Schivell and G. Taylor and Barnes, \{Cris W.\} and Bell, \{M. G.\} and Boivin, \{R. L.\} and N. Bretz and Budny, \{R. V.\} and A. Cavallo and Efthimion, \{P. C.\} and B. Grek and R. Hawryluk and K. Hill and Hulse, \{R. A.\} and A. Janos and Johnson, \{D. W.\} and S. Kilpatrick and Manos, \{D. M.\} and Mansfield, \{D. K.\} and Meade, \{D. M.\} and H. Park and Ramsey, \{A. T.\} and B. Stratton and Synakowski, \{E. J.\} and Towner, \{H. H.\} and Wieland, \{R. M.\} and Zarnstorff, \{M. C.\} and S. Zweben",

year = "1990",

doi = "10.1103/PhysRevLett.65.424",

language = "English (US)",

volume = "65",

pages = "424--427",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "4",

}

Bush, CE, Goldston, RJ, Scott, SD, Fredrickson, ED, McGuire, K, Schivell, J, Taylor, G, Barnes, CW, Bell, MG, Boivin, RL, Bretz, N, Budny, RV, Cavallo, A, Efthimion, PC, Grek, B, Hawryluk, R, Hill, K, Hulse, RA, Janos, A, Johnson, DW, Kilpatrick, S, Manos, DM, Mansfield, DK, Meade, DM, Park, H, Ramsey, AT, Stratton, B, Synakowski, EJ, Towner, HH, Wieland, RM, Zarnstorff, MC & Zweben, S 1990, 'Peaked density profiles in circular-limiter H modes on the TFTR tokamak', Physical review letters, vol. 65, no. 4, pp. 424-427. https://doi.org/10.1103/PhysRevLett.65.424

TY - JOUR

T1 - Peaked density profiles in circular-limiter H modes on the TFTR tokamak

AU - Bush, C. E.

AU - Goldston, Robert James

AU - Scott, S. D.

AU - Fredrickson, E. D.

AU - McGuire, K.

AU - Schivell, J.

AU - Taylor, G.

AU - Barnes, Cris W.

AU - Bell, M. G.

AU - Boivin, R. L.

AU - Bretz, N.

AU - Budny, R. V.

AU - Cavallo, A.

AU - Efthimion, P. C.

AU - Grek, B.

AU - Hawryluk, R.

AU - Hill, K.

AU - Hulse, R. A.

AU - Janos, A.

AU - Johnson, D. W.

AU - Kilpatrick, S.

AU - Manos, D. M.

AU - Mansfield, D. K.

AU - Meade, D. M.

AU - Park, H.

AU - Ramsey, A. T.

AU - Stratton, B.

AU - Synakowski, E. J.

AU - Towner, H. H.

AU - Wieland, R. M.

AU - Zarnstorff, M. C.

AU - Zweben, S.

PY - 1990

Y1 - 1990

N2 - Circular-limiter H modes are obtained on the TFTR tokamak during high-power neutral-beam heating. The transition is usually from the supershot to the H mode rather than the usual L to H transition, and thus is obtained in a low-recycling environment with core fueling mainly from the heating beams. As a result, the density and pressure profiles are highly peaked at the center. The global confinement time E is enhanced over L-mode scaling by up to 2.5 times. The onset of edge-localized MHD modes shortly after the H-mode transition appears to limit E. Limiter H modes of up to 1.5 s duration have been realized.

AB - Circular-limiter H modes are obtained on the TFTR tokamak during high-power neutral-beam heating. The transition is usually from the supershot to the H mode rather than the usual L to H transition, and thus is obtained in a low-recycling environment with core fueling mainly from the heating beams. As a result, the density and pressure profiles are highly peaked at the center. The global confinement time E is enhanced over L-mode scaling by up to 2.5 times. The onset of edge-localized MHD modes shortly after the H-mode transition appears to limit E. Limiter H modes of up to 1.5 s duration have been realized.

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UR - https://www.scopus.com/inward/citedby.url?scp=3743138956&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.65.424

DO - 10.1103/PhysRevLett.65.424

M3 - Article

C2 - 10042917

AN - SCOPUS:3743138956

SN - 0031-9007

VL - 65

SP - 424

EP - 427

JO - Physical review letters

JF - Physical review letters

IS - 4

ER -

Peaked density profiles in circular-limiter H modes on the TFTR tokamak

Abstract

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