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

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.

Authors:
 [1];  [1];  [2]; ORCiD logo [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:
Research Org.:
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1256345
Report Number(s):
PPPL-5199
Journal ID: ISSN 0029-5515
DOE Contract Number:  
AC02-09CH11466; FG02-99ER54524
Resource Type:
Journal Article
Journal Name:
Nuclear Fusion
Additional Journal Information:
Journal Volume: 56; Journal Issue: 3; Journal ID: ISSN 0029-5515
Publisher:
IOP Publishing, Bristol, UK
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY; magnetic confinement; feedback control; rotation Control; neutral beam; injection; neoclassical toroidal viscosity; NSTX; fusion-reactors; turbulence; transport; tokamak

Citation Formats

Goumiri, I. R., Rowley, C. W., Sabbagh, S. A., Gates, D. A., Gerhardt, S. P., Boyer, M. D., Andre, R., Kolemen, E., and Taira, K. Modeling and control of plasma rotation for NSTX using neoclassical toroidal viscosity and neutral beam injection. United States: N. p., 2016. Web. doi:10.1088/0029-5515/56/3/036023.
Goumiri, I. R., Rowley, C. W., Sabbagh, S. A., Gates, D. A., Gerhardt, S. P., Boyer, M. D., Andre, R., Kolemen, E., & Taira, K. Modeling and control of plasma rotation for NSTX using neoclassical toroidal viscosity and neutral beam injection. United States. https://doi.org/10.1088/0029-5515/56/3/036023
Goumiri, I. R., Rowley, C. W., Sabbagh, S. A., Gates, D. A., Gerhardt, S. P., Boyer, M. D., Andre, R., Kolemen, E., and Taira, K. 2016. "Modeling and control of plasma rotation for NSTX using neoclassical toroidal viscosity and neutral beam injection". United States. https://doi.org/10.1088/0029-5515/56/3/036023. https://www.osti.gov/servlets/purl/1256345.
@article{osti_1256345,
title = {Modeling and control of plasma rotation for NSTX using neoclassical toroidal viscosity and neutral beam injection},
author = {Goumiri, I. R. and Rowley, C. W. and Sabbagh, S. A. and Gates, D. A. and Gerhardt, S. P. and Boyer, M. D. and Andre, R. and Kolemen, E. and Taira, K.},
abstractNote = {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.},
doi = {10.1088/0029-5515/56/3/036023},
url = {https://www.osti.gov/biblio/1256345}, journal = {Nuclear Fusion},
issn = {0029-5515},
number = 3,
volume = 56,
place = {United States},
year = {Fri Feb 19 00:00:00 EST 2016},
month = {Fri Feb 19 00:00:00 EST 2016}
}