Published October 9, 2013
| Version v1
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EFD-P(13)59 Effects of Magnetic Shear on Toroidal Rotation in Tokamak Plasmas with LHCD
Creators
- 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
- J.W. Hughes
- P.T. Bonoli
- L. Delgado-Aparicio
- L.-G. Eriksson
- C. Giroud
- R.S. Granetz
- M.J. Greenwald
- A.E. Hubbard
- I.H. Hutchinson
- J.H. Irby
- K. Kirov
- J. Mailloux
- E.S. Marmar
- R.R. Parker
- S.M. Wolfe
- JET EFDA contributors
Description
Application of lower hybrid current drive (LHCD) in tokamak plasmas can induce both co- and counter-current directed changes in toroidal rotation, depending on the core magnetic shear, s. For discharges with s > 1, rotation increments in the countercurrent direction are observed. If the LH driven current is sufficient to suppress sawteeth and reduce the central s below unity, the core toroidal rotation change is in the co-current 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 dependance on s.
Notes
Preprint of Paper to be submitted for publication in Physical Review Letters
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