Characteristics of the First [Formula presented]-Mode Discharges in the National Spherical Torus Experiment

R. Maingi; C. E. Bush; Y. K.M. Peng; M. G. Bell; R. E. Bell; E. D. Fredrickson; D. A. Gates; S. M. Kaye; H. W. Kugel; B. P. LeBlanc; J. E. Menard; D. Mueller; G. Taylor; D. W. Johnson; R. Kaita; M. Ono; S. F. Paul; A. L. Roquemore; C. H. Skinner; V. A. Soukhanovskii; E. J. Synakowski; S. A. Sabbagh; F. Paoletti; D. Stutman; R. J. Maqueda

doi:10.1103/PhysRevLett.88.035003

Characteristics of the First [Formula presented]-Mode Discharges in the National Spherical Torus Experiment

R. Maingi, C. E. Bush, Y. K.M. Peng, M. G. Bell, R. E. Bell, E. D. Fredrickson, D. A. Gates, S. M. Kaye, H. W. Kugel, B. P. LeBlanc, J. E. Menard, D. Mueller, G. Taylor, D. W. Johnson, R. Kaita, M. Ono, S. F. Paul, A. L. Roquemore, C. H. Skinner, V. A. SoukhanovskiiE. J. Synakowski, S. A. Sabbagh, F. Paoletti, D. Stutman, R. J. Maqueda

Department of Physics

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

3 Scopus citations

Abstract

We report observations of the first low-to-high ([Formula presented]) confinement mode transitions in the National Spherical Torus Experiment. The [Formula presented]-mode energy confinement time increased over reference discharges transiently by [Formula presented], as high as [Formula presented]. This confinement time is [Formula presented] times higher than predicted by a multimachine scaling. Thus the confinement time of spherical tori has been extended to a record high value, leading to an eventual revision of confinement scalings. Finally, the power threshold for [Formula presented]-mode access is [Formula presented] higher than predicted by an international scaling from conventional aspect-ratio tokamaks, which could lead to new understanding of [Formula presented]-mode transition dynamics.

Original language	English
Pages (from-to)	4
Number of pages	1
Journal	Physical Review Letters
Volume	88
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevLett.88.035003
State	Published - 2002

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Maingi, R., Bush, C. E., Peng, Y. K. M., Bell, M. G., Bell, R. E., Fredrickson, E. D., Gates, D. A., Kaye, S. M., Kugel, H. W., LeBlanc, B. P., Menard, J. E., Mueller, D., Taylor, G., Johnson, D. W., Kaita, R., Ono, M., Paul, S. F., Roquemore, A. L., Skinner, C. H., ... Maqueda, R. J. (2002). Characteristics of the First [Formula presented]-Mode Discharges in the National Spherical Torus Experiment. Physical Review Letters, 88(3), 4. https://doi.org/10.1103/PhysRevLett.88.035003

@article{9913c01331c743699b57444e12033291,

title = "Characteristics of the First [Formula presented]-Mode Discharges in the National Spherical Torus Experiment",

abstract = "We report observations of the first low-to-high ([Formula presented]) confinement mode transitions in the National Spherical Torus Experiment. The [Formula presented]-mode energy confinement time increased over reference discharges transiently by [Formula presented], as high as [Formula presented]. This confinement time is [Formula presented] times higher than predicted by a multimachine scaling. Thus the confinement time of spherical tori has been extended to a record high value, leading to an eventual revision of confinement scalings. Finally, the power threshold for [Formula presented]-mode access is [Formula presented] higher than predicted by an international scaling from conventional aspect-ratio tokamaks, which could lead to new understanding of [Formula presented]-mode transition dynamics.",

author = "R. Maingi and Bush, \{C. E.\} and Peng, \{Y. K.M.\} and Bell, \{M. G.\} and Bell, \{R. E.\} and Fredrickson, \{E. D.\} and Gates, \{D. A.\} and Kaye, \{S. M.\} and Kugel, \{H. W.\} and LeBlanc, \{B. P.\} and Menard, \{J. E.\} and D. Mueller and G. Taylor and Johnson, \{D. W.\} and R. Kaita and M. Ono and Paul, \{S. F.\} and Roquemore, \{A. L.\} and Skinner, \{C. H.\} and Soukhanovskii, \{V. A.\} and Synakowski, \{E. J.\} and Sabbagh, \{S. A.\} and F. Paoletti and D. Stutman and Maqueda, \{R. J.\}",

year = "2002",

doi = "10.1103/PhysRevLett.88.035003",

language = "English",

volume = "88",

pages = "4",

number = "3",

}

Maingi, R, Bush, CE, Peng, YKM, Bell, MG, Bell, RE, Fredrickson, ED, Gates, DA, Kaye, SM, Kugel, HW, LeBlanc, BP, Menard, JE, Mueller, D, Taylor, G, Johnson, DW, Kaita, R, Ono, M, Paul, SF, Roquemore, AL, Skinner, CH, Soukhanovskii, VA, Synakowski, EJ, Sabbagh, SA, Paoletti, F, Stutman, D & Maqueda, RJ 2002, 'Characteristics of the First [Formula presented]-Mode Discharges in the National Spherical Torus Experiment', Physical Review Letters, vol. 88, no. 3, pp. 4. https://doi.org/10.1103/PhysRevLett.88.035003

TY - JOUR

T1 - Characteristics of the First [Formula presented]-Mode Discharges in the National Spherical Torus Experiment

AU - Maingi, R.

AU - Bush, C. E.

AU - Peng, Y. K.M.

AU - Bell, M. G.

AU - Bell, R. E.

AU - Fredrickson, E. D.

AU - Gates, D. A.

AU - Kaye, S. M.

AU - Kugel, H. W.

AU - LeBlanc, B. P.

AU - Menard, J. E.

AU - Mueller, D.

AU - Taylor, G.

AU - Johnson, D. W.

AU - Kaita, R.

AU - Ono, M.

AU - Paul, S. F.

AU - Roquemore, A. L.

AU - Skinner, C. H.

AU - Soukhanovskii, V. A.

AU - Synakowski, E. J.

AU - Sabbagh, S. A.

AU - Paoletti, F.

AU - Stutman, D.

AU - Maqueda, R. J.

PY - 2002

Y1 - 2002

N2 - We report observations of the first low-to-high ([Formula presented]) confinement mode transitions in the National Spherical Torus Experiment. The [Formula presented]-mode energy confinement time increased over reference discharges transiently by [Formula presented], as high as [Formula presented]. This confinement time is [Formula presented] times higher than predicted by a multimachine scaling. Thus the confinement time of spherical tori has been extended to a record high value, leading to an eventual revision of confinement scalings. Finally, the power threshold for [Formula presented]-mode access is [Formula presented] higher than predicted by an international scaling from conventional aspect-ratio tokamaks, which could lead to new understanding of [Formula presented]-mode transition dynamics.

AB - We report observations of the first low-to-high ([Formula presented]) confinement mode transitions in the National Spherical Torus Experiment. The [Formula presented]-mode energy confinement time increased over reference discharges transiently by [Formula presented], as high as [Formula presented]. This confinement time is [Formula presented] times higher than predicted by a multimachine scaling. Thus the confinement time of spherical tori has been extended to a record high value, leading to an eventual revision of confinement scalings. Finally, the power threshold for [Formula presented]-mode access is [Formula presented] higher than predicted by an international scaling from conventional aspect-ratio tokamaks, which could lead to new understanding of [Formula presented]-mode transition dynamics.

UR - https://www.scopus.com/pages/publications/85038338821

UR - https://www.scopus.com/inward/citedby.url?scp=85038338821&partnerID=8YFLogxK

U2 - 10.1103/PhysRevLett.88.035003

DO - 10.1103/PhysRevLett.88.035003

M3 - Article

AN - SCOPUS:85038338821

SN - 0031-9007

VL - 88

SP - 4

JO - Physical Review Letters

JF - Physical Review Letters

IS - 3

ER -

Characteristics of the First [Formula presented]-Mode Discharges in the National Spherical Torus Experiment

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