Modeling and control of plasma rotation for NSTX using neoclassical toroidal viscosity and neutral beam injection

I. R. Goumiri, Clarence Worth Rowley, S. A. Sabbagh, D. A. Gates, S. P. Gerhardt, M. D. Boyer, R. Andre, Egemen Kolemen, K. Taira

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

A model-based feedback system is presented to control plasma rotation in a magnetically confined toroidal fusion device, to maintain plasma stability for long-pulse operation. This research uses experimental measurements from the National Spherical Torus Experiment (NSTX) and is aimed at controlling plasma rotation using two different types of actuation: momentum from injected neutral beams and neoclassical toroidal viscosity generated by three-dimensional applied magnetic fields. Based on the data-driven model obtained, a feedback controller is designed, and predictive simulations using the TRANSP plasma transport code show that the controller is able to attain desired plasma rotation profiles given practical constraints on the actuators and the available measurements of rotation.

Original languageEnglish (US)
Article number036023
JournalNuclear Fusion
Volume56
Issue number3
DOIs
StatePublished - Feb 19 2016

All Science Journal Classification (ASJC) codes

  • Nuclear and High Energy Physics
  • Condensed Matter Physics

Keywords

  • NSTX
  • feedback control
  • magnetic confinement
  • neoclassical toroidal viscosity
  • neutral beam injection
  • rotation Control

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