Effects of magnetic shear on toroidal rotation in tokamak plasmas with lower hybrid current drive

J. E. Rice; Y. A. Podpaly; M. L. Reinke; R. Mumgaard; S. D. Scott; S. Shiraiwa; G. M. Wallace; B. Chouli; C. Fenzi-Bonizec; M. F.F. Nave; P. H. Diamond; C. Gao; R. S. Granetz; J. W. Hughes; R. R. Parker; P. T. Bonoli; L. Delgado-Aparicio; L. G. Eriksson; C. Giroud; M. J. Greenwald; A. E. Hubbard; I. H. Hutchinson; J. H. Irby; K. Kirov; J. Mailloux; E. S. Marmar; S. M. Wolfe

doi:10.1103/PhysRevLett.111.125003

Effects of magnetic shear on toroidal rotation in tokamak plasmas with lower hybrid current drive

J. E. Rice, Y. A. Podpaly, M. L. Reinke, R. Mumgaard, S. D. Scott, S. Shiraiwa, G. M. Wallace, B. Chouli, C. Fenzi-Bonizec, M. F.F. Nave, P. H. Diamond, C. Gao, R. S. Granetz, J. W. Hughes, R. R. Parker, P. T. Bonoli, L. Delgado-Aparicio, L. G. Eriksson, C. Giroud, M. J. GreenwaldA. E. Hubbard, I. H. Hutchinson, J. H. Irby, K. Kirov, J. Mailloux, E. S. Marmar, S. M. Wolfe

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Abstract

Application of lower hybrid (LH) current drive in tokamak plasmas can induce both co- and countercurrent directed changes in toroidal rotation, depending on the core q profile. For discharges with q₀<1, rotation increments in the countercurrent direction are observed. If the LH-driven current is sufficient to suppress sawteeth and increase q₀ above unity, the core toroidal rotation change is in the cocurrent direction. This change in sign of the rotation increment is consistent with a change in sign of the residual stress (the divergence of which constitutes an intrinsic torque that drives the flow) through its dependence on magnetic shear.

Original language	English (US)
Article number	125003
Journal	Physical review letters
Volume	111
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevLett.111.125003
State	Published - Sep 17 2013

All Science Journal Classification (ASJC) codes

General Physics and Astronomy

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10.1103/PhysRevLett.111.125003

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Rice, J. E., Podpaly, Y. A., Reinke, M. L., Mumgaard, R., Scott, S. D., Shiraiwa, S., Wallace, G. M., Chouli, B., Fenzi-Bonizec, C., Nave, M. F. F., Diamond, P. H., Gao, C., Granetz, R. S., Hughes, J. W., Parker, R. R., Bonoli, P. T., Delgado-Aparicio, L., Eriksson, L. G., Giroud, C., ... Wolfe, S. M. (2013). Effects of magnetic shear on toroidal rotation in tokamak plasmas with lower hybrid current drive. Physical review letters, 111(12), Article 125003. https://doi.org/10.1103/PhysRevLett.111.125003

@article{60c81bc3cc624d73b7b802a50a5d422a,

title = "Effects of magnetic shear on toroidal rotation in tokamak plasmas with lower hybrid current drive",

abstract = "Application of lower hybrid (LH) current drive in tokamak plasmas can induce both co- and countercurrent directed changes in toroidal rotation, depending on the core q profile. For discharges with q0<1, rotation increments in the countercurrent direction are observed. If the LH-driven current is sufficient to suppress sawteeth and increase q0 above unity, the core toroidal rotation change is in the cocurrent direction. This change in sign of the rotation increment is consistent with a change in sign of the residual stress (the divergence of which constitutes an intrinsic torque that drives the flow) through its dependence on magnetic shear.",

author = "Rice, \{J. E.\} and Podpaly, \{Y. A.\} and Reinke, \{M. L.\} and R. Mumgaard and Scott, \{S. D.\} and S. Shiraiwa and Wallace, \{G. M.\} and B. Chouli and C. Fenzi-Bonizec and Nave, \{M. F.F.\} and Diamond, \{P. H.\} and C. Gao and Granetz, \{R. S.\} and Hughes, \{J. W.\} and Parker, \{R. R.\} and Bonoli, \{P. T.\} and L. Delgado-Aparicio and Eriksson, \{L. G.\} and C. Giroud and Greenwald, \{M. J.\} and Hubbard, \{A. E.\} and Hutchinson, \{I. H.\} and Irby, \{J. H.\} and K. Kirov and J. Mailloux and Marmar, \{E. S.\} and Wolfe, \{S. M.\}",

year = "2013",

month = sep,

day = "17",

doi = "10.1103/PhysRevLett.111.125003",

language = "English (US)",

volume = "111",

journal = "Physical review letters",

issn = "0031-9007",

publisher = "American Physical Society",

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Rice, JE, Podpaly, YA, Reinke, ML, Mumgaard, R, Scott, SD, Shiraiwa, S, Wallace, GM, Chouli, B, Fenzi-Bonizec, C, Nave, MFF, Diamond, PH, Gao, C, Granetz, RS, Hughes, JW, Parker, RR, Bonoli, PT, Delgado-Aparicio, L, Eriksson, LG, Giroud, C, Greenwald, MJ, Hubbard, AE, Hutchinson, IH, Irby, JH, Kirov, K, Mailloux, J, Marmar, ES & Wolfe, SM 2013, 'Effects of magnetic shear on toroidal rotation in tokamak plasmas with lower hybrid current drive', Physical review letters, vol. 111, no. 12, 125003. https://doi.org/10.1103/PhysRevLett.111.125003

TY - JOUR

T1 - Effects of magnetic shear on toroidal rotation in tokamak plasmas with lower hybrid current drive

AU - Rice, J. E.

AU - Podpaly, Y. A.

AU - Reinke, M. L.

AU - Mumgaard, R.

AU - Scott, S. D.

AU - Shiraiwa, S.

AU - Wallace, G. M.

AU - Chouli, B.

AU - Fenzi-Bonizec, C.

AU - Nave, M. F.F.

AU - Diamond, P. H.

AU - Gao, C.

AU - Granetz, R. S.

AU - Hughes, J. W.

AU - Parker, R. R.

AU - Bonoli, P. T.

AU - Delgado-Aparicio, L.

AU - Eriksson, L. G.

AU - Giroud, C.

AU - Greenwald, M. J.

AU - Hubbard, A. E.

AU - Hutchinson, I. H.

AU - Irby, J. H.

AU - Kirov, K.

AU - Mailloux, J.

AU - Marmar, E. S.

AU - Wolfe, S. M.

PY - 2013/9/17

Y1 - 2013/9/17

N2 - Application of lower hybrid (LH) current drive in tokamak plasmas can induce both co- and countercurrent directed changes in toroidal rotation, depending on the core q profile. For discharges with q0<1, rotation increments in the countercurrent direction are observed. If the LH-driven current is sufficient to suppress sawteeth and increase q0 above unity, the core toroidal rotation change is in the cocurrent direction. This change in sign of the rotation increment is consistent with a change in sign of the residual stress (the divergence of which constitutes an intrinsic torque that drives the flow) through its dependence on magnetic shear.

AB - Application of lower hybrid (LH) current drive in tokamak plasmas can induce both co- and countercurrent directed changes in toroidal rotation, depending on the core q profile. For discharges with q0<1, rotation increments in the countercurrent direction are observed. If the LH-driven current is sufficient to suppress sawteeth and increase q0 above unity, the core toroidal rotation change is in the cocurrent direction. This change in sign of the rotation increment is consistent with a change in sign of the residual stress (the divergence of which constitutes an intrinsic torque that drives the flow) through its dependence on magnetic shear.

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C2 - 24093268

AN - SCOPUS:84884679165

SN - 0031-9007

VL - 111

JO - Physical review letters

JF - Physical review letters

IS - 12

M1 - 125003

ER -

Effects of magnetic shear on toroidal rotation in tokamak plasmas with lower hybrid current drive

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