Stationary discharges with H-mode edge and internal transport barrier for energy, momentum, and particle transport have been obtained on ASDEX Upgrade. At a line averaged density of 4×10¹⁹m^-3 an H factor of H_ITER89-P0ex0ex=0ex0ex2.4 and βN0ex0ex=0ex0ex2 could be maintained for 6 s corresponding to 40 confinement times, limited only by the possible discharge duration. The q profile is flat in the center and close to 1. Current diffusion calculations suggest that reconnection is required to clamp the safety factor at 1, which in the absence of sawteeth is explained by the strong fishbone activity.
No takes yet. Share an insight, caveat, or question.
Gruber et al. (1999) studied this question.
Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context: