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Control of plasma profiles in DIII-D discharges

  • P. Gohil
  • , T. E. Evans
  • , J. R. Ferron
  • , R. A. Moyer
  • , C. C. Petty
  • , K. H. Burrell
  • , T. A. Casper
  • , A. M. Garofalo
  • , A. W. Hyatt
  • , R. J. Jayakumar
  • , C. Kessel
  • , J. Y. Kim
  • , R. J. La Haye
  • , J. Lohr
  • , T. C. Luce
  • , M. A. Makowski
  • , D. Mazon
  • , J. Menard
  • , M. Murakami
  • , P. A. Politzer
  • R. Prater, M. R. Wade

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

Active control of plasma profiles is an essential requirement for operating within plasma stability limits, for steady-state operation and for optimization of the plasma performance. In DIII-D, plasma profiles have been actively controlled using various actuators in the following manner: (a) real time closed loop control of the q profile evolution using electron cyclotron heating and neutral beam injection as actuators; (b) active control of the density and pressure profiles in quiescent H-mode and quiescent double barrier plasmas using electron cyclotron current drive (ECCD) and pellet injection; (c) active control of the edge profiles to suppress edge localized modes using resonant magnetic perturbation with toroidal mode number n = 3, (d) real time control of the current density profile to suppress neoclassical tearing modes using localized deposition of co-ECCD.

Original languageEnglish
Pages (from-to)A45-A53
JournalPlasma Physics and Controlled Fusion
Volume48
Issue number5 A
DOIs
StatePublished - May 2006
Externally publishedYes

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