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

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.
 [1] ;  [1] ;  [2] ;  [3] ;  [3] ;  [3] ;  [3] ;  [3] ;  [4]
  1. Princeton Univ., NJ (United States). Mechanical and Aerospace Dept.
  2. Columbia Univ., New York, NY (United States). Dept. of Applied Physics and Applied Mathematics
  3. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
  4. Florida State Univ, Dept Mech Engn, Tallahassee, FL USA.
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 0029-5515
DOE Contract Number:
AC02-09CH11466; FG02-99ER54524
Resource Type:
Journal Article
Resource Relation:
Journal Name: Nuclear Fusion; Journal Volume: 56; Journal Issue: 3
IOP Publishing, Bristol, UK
Research Org:
Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)
Sponsoring Org:
Country of Publication:
United States
70 PLASMA PHYSICS AND FUSION TECHNOLOGY magnetic confinement; feedback control; rotation Control; neutral beam; injection; neoclassical toroidal viscosity; NSTX; fusion-reactors; turbulence; transport; tokamak