@article{7033,
  author = {A.C.C. Sips and T. A. Casper and E. J. Doyle and G. Giruzzi and Y. Gribov and J. Hobirk and G. M. D. Hogeweij and L. D. Horton and A. E. Hubbard and I. Hutchinson and S. Ide and A. Isayama and F. Imbeaux and G. L. Jackson and Y. Kamada and C. Kessel and F. Kochl and P. Lomas and X. Litaudon and T. C. Luce and E. Marmar and M. Mattei and I. Nunes and N. Oyama and V. Parail and A. Portone and G. Saibene and R. Sartori and J. K. Stober and T. Suzuki and S. M. Wolfe},
  title = {Experimental studies of ITER demonstration discharges},
  abstract = {Key parts of the ITER scenarios are determined by the capability of the proposed poloidal field (PF) coil set. They include the plasma breakdown at low loop voltage, the current rise phase, the performance during the flat top (FT) phase and a ramp down of the plasma. The ITER discharge evolution has been verified in dedicated experiments. New data are obtained from C-Mod, ASDEX Upgrade, DIII-D, JT-60U and JET. Results show that breakdown for E-axis < 0.23-0.33 V m(-1) is possible unassisted (ohmic) for large devices like JET and attainable in devices with a capability of using ECRH assist. For the current ramp up, good control of the plasma inductance is obtained using a full bore plasma shape with early X-point formation. This allows optimization of the flux usage from the PF set. Additional heating keeps l(i)(3) < 0.85 during the ramp up to q(95) = 3. A rise phase with an H-mode transition is capable of achieving l(i)(3) < 0.7 at the start of the FT. Operation of the H-mode reference scenario at q(95) similar to 3 and the hybrid scenario at q(95) = 4-4.5 during the FT phase is documented, providing data for the l(i) (3) evolution after the H-mode transition and the li (3) evolution after a back-transition to L-mode. During the ITER ramp down it is important to remain diverted and to reduce the elongation. The inductance could be kept },
  year = {2009},
  journal = {Nuclear Fusion},
  volume = {49},
  number = {8},
  pages = {11},
  month = {Aug},
  isbn = {0029-5515},
  url = {<Go to ISI>://000268936800015 },
  note = {ISI Document Delivery No.: 483BMTimes Cited: 1Cited Reference Count: 26},
  language = {English},
}