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

ORAL

Abstract

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.

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Authors

  • J.R. Ferron

  • P. Gohil

  • C.M. Greenfield

    • General Atomics

  • J. Lohr

  • T.C. Luce

  • C.C. Petty

    • General Atomics
    • GA

  • M.R. Wade

    • General Atomics

  • T.A. Casper

  • R.J. Jayakumar

  • M.A. Makowski

    • LLNL

  • M. Murakami

    • ORNL

  • D. Mazon

    • CEA