Feedback Control of the Safety Factor Profile Evolution in DIII-D Advanced Tokamak Discharges*

In an advanced tokamak discharge in DIII-D, the $q$ profile is established during the plasma current ramp-up and early flattop phases and sustained during the subsequent high beta phase. Initial feedback control experiments have focused on ensuring that the desired $q$ profile at the start of the high beta phase, $1.5

*Work supported by U.S. DOE under DE-FC02-04ER54698, W-7405-ENG-48, DE-AC05-00OR22725.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2005.DPP.BO3.3