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. PolitzerR. 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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