High non-inductive fraction H-mode discharges generated by high-harmonic fast wave heating and current drive in the National Spherical Torus Experiment

G. Taylor; J. C. Hosea; C. E. Kessel; B. P. Leblanc; D. Mueller; C. K. Phillips; E. J. Valeo; J. R. Wilson; P. M. Ryan; P. T. Bonoli; J. C. Wright; R. W. Harvey

doi:10.1063/1.3699364

High non-inductive fraction H-mode discharges generated by high-harmonic fast wave heating and current drive in the National Spherical Torus Experiment

G. Taylor
, J. C. Hosea
, C. E. Kessel
, B. P. Leblanc
, D. Mueller
, C. K. Phillips
, E. J. Valeo
, J. R. Wilson
, P. M. Ryan
, P. T. Bonoli
, J. C. Wright
, R. W. Harvey

PPPL NSTX

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

26 Scopus citations

Abstract

A deuterium H-mode discharge with a plasma current of 300 kA, an axial toroidal magnetic field of 0.55 T, and a calculated non-inductive plasma current fraction of 0.7-1 has been generated in the National Spherical Torus Experiment by 1.4 MW of 30 MHz high-harmonic fast wave (HHFW) heating and current drive. Seventy-five percent of the non-inductive current was generated inside an internal transport barrier that formed at a normalized minor radius ∼0.4. Three quarters of the non-inductive current was bootstrap current, and the remaining non-inductive current was generated directly by HHFW power inside a normalized minor radius ∼0.2.

Original language	English (US)
Article number	042501
Journal	Physics of Plasmas
Volume	19
Issue number	4
DOIs	https://doi.org/10.1063/1.3699364
State	Published - Apr 2012

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/1.3699364

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Taylor, G., Hosea, J. C., Kessel, C. E., Leblanc, B. P., Mueller, D., Phillips, C. K., Valeo, E. J., Wilson, J. R., Ryan, P. M., Bonoli, P. T., Wright, J. C., & Harvey, R. W. (2012). High non-inductive fraction H-mode discharges generated by high-harmonic fast wave heating and current drive in the National Spherical Torus Experiment. Physics of Plasmas, 19(4), Article 042501. https://doi.org/10.1063/1.3699364

@article{4bdaef4b2d534e43af4c8fb56f618f6b,

title = "High non-inductive fraction H-mode discharges generated by high-harmonic fast wave heating and current drive in the National Spherical Torus Experiment",

abstract = "A deuterium H-mode discharge with a plasma current of 300 kA, an axial toroidal magnetic field of 0.55 T, and a calculated non-inductive plasma current fraction of 0.7-1 has been generated in the National Spherical Torus Experiment by 1.4 MW of 30 MHz high-harmonic fast wave (HHFW) heating and current drive. Seventy-five percent of the non-inductive current was generated inside an internal transport barrier that formed at a normalized minor radius ∼0.4. Three quarters of the non-inductive current was bootstrap current, and the remaining non-inductive current was generated directly by HHFW power inside a normalized minor radius ∼0.2.",

author = "G. Taylor and Hosea, \{J. C.\} and Kessel, \{C. E.\} and Leblanc, \{B. P.\} and D. Mueller and Phillips, \{C. K.\} and Valeo, \{E. J.\} and Wilson, \{J. R.\} and Ryan, \{P. M.\} and Bonoli, \{P. T.\} and Wright, \{J. C.\} and Harvey, \{R. W.\}",

year = "2012",

month = apr,

doi = "10.1063/1.3699364",

language = "English (US)",

volume = "19",

journal = "Physics of Plasmas",

issn = "1070-664X",

publisher = "American Institute of Physics",

number = "4",

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Taylor, G, Hosea, JC, Kessel, CE, Leblanc, BP, Mueller, D, Phillips, CK, Valeo, EJ, Wilson, JR, Ryan, PM, Bonoli, PT, Wright, JC & Harvey, RW 2012, 'High non-inductive fraction H-mode discharges generated by high-harmonic fast wave heating and current drive in the National Spherical Torus Experiment', Physics of Plasmas, vol. 19, no. 4, 042501. https://doi.org/10.1063/1.3699364

TY - JOUR

T1 - High non-inductive fraction H-mode discharges generated by high-harmonic fast wave heating and current drive in the National Spherical Torus Experiment

AU - Taylor, G.

AU - Hosea, J. C.

AU - Kessel, C. E.

AU - Leblanc, B. P.

AU - Mueller, D.

AU - Phillips, C. K.

AU - Valeo, E. J.

AU - Wilson, J. R.

AU - Ryan, P. M.

AU - Bonoli, P. T.

AU - Wright, J. C.

AU - Harvey, R. W.

PY - 2012/4

Y1 - 2012/4

N2 - A deuterium H-mode discharge with a plasma current of 300 kA, an axial toroidal magnetic field of 0.55 T, and a calculated non-inductive plasma current fraction of 0.7-1 has been generated in the National Spherical Torus Experiment by 1.4 MW of 30 MHz high-harmonic fast wave (HHFW) heating and current drive. Seventy-five percent of the non-inductive current was generated inside an internal transport barrier that formed at a normalized minor radius ∼0.4. Three quarters of the non-inductive current was bootstrap current, and the remaining non-inductive current was generated directly by HHFW power inside a normalized minor radius ∼0.2.

AB - A deuterium H-mode discharge with a plasma current of 300 kA, an axial toroidal magnetic field of 0.55 T, and a calculated non-inductive plasma current fraction of 0.7-1 has been generated in the National Spherical Torus Experiment by 1.4 MW of 30 MHz high-harmonic fast wave (HHFW) heating and current drive. Seventy-five percent of the non-inductive current was generated inside an internal transport barrier that formed at a normalized minor radius ∼0.4. Three quarters of the non-inductive current was bootstrap current, and the remaining non-inductive current was generated directly by HHFW power inside a normalized minor radius ∼0.2.

UR - https://www.scopus.com/pages/publications/84860495730

UR - https://www.scopus.com/pages/publications/84860495730#tab=citedBy

U2 - 10.1063/1.3699364

DO - 10.1063/1.3699364

M3 - Article

AN - SCOPUS:84860495730

SN - 1070-664X

VL - 19

JO - Physics of Plasmas

JF - Physics of Plasmas

IS - 4

M1 - 042501

ER -

High non-inductive fraction H-mode discharges generated by high-harmonic fast wave heating and current drive in the National Spherical Torus Experiment

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