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. Soukhanovskii

E. J. Synakowski, S. A. Sabbagh, F. Paoletti, D. Stutman, R. J. Maqueda

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 (US)
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

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.88.035003

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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{383fd859758f48219aa747df9ba3df2a,

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 (US)",

volume = "88",

pages = "4",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

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}

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/pages/publications/85038338821#tab=citedBy

U2 - 10.1103/PhysRevLett.88.035003

DO - 10.1103/PhysRevLett.88.035003

M3 - Article

C2 - 11801067

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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