@article{5801,
  author = {M.R. de Baar and G. M. D. Hogeweij and N. J. L. Cardozo and A. A. M. Oomens and F. C. Schüller},
  title = {Electron thermal transport barrier and magnetohydrodynamic activity observed in Tokamak plasmas with negative central shear},
  abstract = {In the Rijnhuizen Tokamak Project, plasmas with steady-state negative central shear (NCS) are made with off-axis electron cyclotron heating. Shifting the power deposition by 2 mm results in a sharp transition of confinement. The good confinement branch features a transport barrier at the off-axis minimum of the safety factor (q), where q less than or equal to 3, and two magnetohydrodynamic (MHD) instabilities, where one is localized at the off-axis minimum of q and one covers the entire NCS region. The low confinement branch has q > 3 everywhere, no transport barrier, and no MHD activity.},
  year = {1997},
  journal = {Physical Review Letters},
  volume = {78},
  number = {24},
  pages = {4573-4576},
  month = {Jun 16},
  isbn = {0031-9007},
  doi = {10.1103/PhysRevLett.78.4573},
  language = {eng},
}