Energy transport in tokamak plasmas with central current density control using fast waves

C. B. Forest; C. C. Petty; M. E. Austin; F. W. Baity; K. H. Burrell; S. C. Chiu; M. S. Chu; P. Gohil; A. W. Hyatt; H. Ikezi; E. A. Lazarus; M. Murakami; R. I. Pinsker; M. Porkolab; R. Prater; B. W. Rice; G. M. Staebler; E. J. Strait; T. S. Taylor

doi:10.1103/PhysRevLett.77.3141

Energy transport in tokamak plasmas with central current density control using fast waves

C. B. Forest, C. C. Petty, M. E. Austin, F. W. Baity, K. H. Burrell, S. C. Chiu, M. S. Chu, P. Gohil, A. W. Hyatt, H. Ikezi, E. A. Lazarus, M. Murakami, R. I. Pinsker, M. Porkolab, R. Prater, B. W. Rice, G. M. Staebler, E. J. Strait, T. S. Taylor

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

38 Scopus citations

Abstract

Fast wave current drive has been used to substantially modify the central current density profile in a tokamak plasma. Counter-fast wave current drive (FWCD) applied to discharges with negative central magnetic shear enhances the shear reversal and leads to a distinct transition to a mode of improved core confinement. In this state, the electron thermal diffusivity decreases by \(50+/-20\)% and the ion diffusivity by \(80+/-20\)%, compared to just before the transition. The FWCD and electron heating elucidates the role of the current profile on confinement and stability.

Original language	English
Pages (from-to)	3141-3144
Number of pages	4
Journal	Physical Review Letters
Volume	77
Issue number	15
DOIs	https://doi.org/10.1103/PhysRevLett.77.3141
State	Published - 1996
Externally published	Yes

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Forest, C. B., Petty, C. C., Austin, M. E., Baity, F. W., Burrell, K. H., Chiu, S. C., Chu, M. S., Gohil, P., Hyatt, A. W., Ikezi, H., Lazarus, E. A., Murakami, M., Pinsker, R. I., Porkolab, M., Prater, R., Rice, B. W., Staebler, G. M., Strait, E. J., & Taylor, T. S. (1996). Energy transport in tokamak plasmas with central current density control using fast waves. Physical Review Letters, 77(15), 3141-3144. https://doi.org/10.1103/PhysRevLett.77.3141

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title = "Energy transport in tokamak plasmas with central current density control using fast waves",

abstract = "Fast wave current drive has been used to substantially modify the central current density profile in a tokamak plasma. Counter-fast wave current drive (FWCD) applied to discharges with negative central magnetic shear enhances the shear reversal and leads to a distinct transition to a mode of improved core confinement. In this state, the electron thermal diffusivity decreases by \textbackslash{}(50+/-20\textbackslash{})\% and the ion diffusivity by \textbackslash{}(80+/-20\textbackslash{})\%, compared to just before the transition. The FWCD and electron heating elucidates the role of the current profile on confinement and stability.",

author = "Forest, \{C. B.\} and Petty, \{C. C.\} and Austin, \{M. E.\} and Baity, \{F. W.\} and Burrell, \{K. H.\} and Chiu, \{S. C.\} and Chu, \{M. S.\} and P. Gohil and Hyatt, \{A. W.\} and H. Ikezi and Lazarus, \{E. A.\} and M. Murakami and Pinsker, \{R. I.\} and M. Porkolab and R. Prater and Rice, \{B. W.\} and Staebler, \{G. M.\} and Strait, \{E. J.\} and Taylor, \{T. S.\}",

year = "1996",

doi = "10.1103/PhysRevLett.77.3141",

language = "English",

volume = "77",

pages = "3141--3144",

journal = "Physical Review Letters",

issn = "0031-9007",

publisher = "American Physical Society",

number = "15",

}

Forest, CB, Petty, CC, Austin, ME, Baity, FW, Burrell, KH, Chiu, SC, Chu, MS, Gohil, P, Hyatt, AW, Ikezi, H, Lazarus, EA, Murakami, M, Pinsker, RI, Porkolab, M, Prater, R, Rice, BW, Staebler, GM, Strait, EJ & Taylor, TS 1996, 'Energy transport in tokamak plasmas with central current density control using fast waves', Physical Review Letters, vol. 77, no. 15, pp. 3141-3144. https://doi.org/10.1103/PhysRevLett.77.3141

TY - JOUR

T1 - Energy transport in tokamak plasmas with central current density control using fast waves

AU - Forest, C. B.

AU - Petty, C. C.

AU - Austin, M. E.

AU - Baity, F. W.

AU - Burrell, K. H.

AU - Chiu, S. C.

AU - Chu, M. S.

AU - Gohil, P.

AU - Hyatt, A. W.

AU - Ikezi, H.

AU - Lazarus, E. A.

AU - Murakami, M.

AU - Pinsker, R. I.

AU - Porkolab, M.

AU - Prater, R.

AU - Rice, B. W.

AU - Staebler, G. M.

AU - Strait, E. J.

AU - Taylor, T. S.

PY - 1996

Y1 - 1996

N2 - Fast wave current drive has been used to substantially modify the central current density profile in a tokamak plasma. Counter-fast wave current drive (FWCD) applied to discharges with negative central magnetic shear enhances the shear reversal and leads to a distinct transition to a mode of improved core confinement. In this state, the electron thermal diffusivity decreases by \(50+/-20\)% and the ion diffusivity by \(80+/-20\)%, compared to just before the transition. The FWCD and electron heating elucidates the role of the current profile on confinement and stability.

AB - Fast wave current drive has been used to substantially modify the central current density profile in a tokamak plasma. Counter-fast wave current drive (FWCD) applied to discharges with negative central magnetic shear enhances the shear reversal and leads to a distinct transition to a mode of improved core confinement. In this state, the electron thermal diffusivity decreases by \(50+/-20\)% and the ion diffusivity by \(80+/-20\)%, compared to just before the transition. The FWCD and electron heating elucidates the role of the current profile on confinement and stability.

UR - https://www.scopus.com/pages/publications/0001733410

U2 - 10.1103/PhysRevLett.77.3141

DO - 10.1103/PhysRevLett.77.3141

M3 - Article

AN - SCOPUS:0001733410

SN - 0031-9007

VL - 77

SP - 3141

EP - 3144

JO - Physical Review Letters

JF - Physical Review Letters

IS - 15

ER -

Energy transport in tokamak plasmas with central current density control using fast waves

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