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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