Simultaneous feedback control of plasma rotation and stored energy on NSTX-U using neoclassical toroidal viscosity and neutral beam injection

I. R. Goumiri; Clarence Worth Rowley; S. A. Sabbagh; D. A. Gates; M. D. Boyer; S. P. Gerhardt; Egemen Kolemen; J. E. Menard

doi:10.1063/1.4976853

Simultaneous feedback control of plasma rotation and stored energy on NSTX-U using neoclassical toroidal viscosity and neutral beam injection

I. R. Goumiri, Clarence Worth Rowley, S. A. Sabbagh, D. A. Gates, M. D. Boyer, S. P. Gerhardt, Egemen Kolemen, J. E. Menard

Research output: Contribution to journal › Article › peer-review

13 Scopus citations

Abstract

A model-based feedback system is presented enabling the simultaneous control of the stored energy through β_n and the toroidal rotation profile of the plasma in National Spherical Torus eXperiment Upgrade device. Actuation is obtained using the momentum from six injected neutral beams and the neoclassical toroidal viscosity generated by applying three-dimensional magnetic fields. Based on a model of the momentum diffusion and torque balance, a feedback controller is designed and tested in closed-loop simulations using TRANSP, a time dependent transport analysis code, in predictive mode. Promising results for the ongoing experimental implementation of controllers are obtained.

Original language	English (US)
Article number	056101
Journal	Physics of Plasmas
Volume	24
Issue number	5
DOIs	https://doi.org/10.1063/1.4976853
State	Published - May 1 2017

All Science Journal Classification (ASJC) codes

Condensed Matter Physics

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10.1063/1.4976853

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title = "Simultaneous feedback control of plasma rotation and stored energy on NSTX-U using neoclassical toroidal viscosity and neutral beam injection",

abstract = "A model-based feedback system is presented enabling the simultaneous control of the stored energy through βn and the toroidal rotation profile of the plasma in National Spherical Torus eXperiment Upgrade device. Actuation is obtained using the momentum from six injected neutral beams and the neoclassical toroidal viscosity generated by applying three-dimensional magnetic fields. Based on a model of the momentum diffusion and torque balance, a feedback controller is designed and tested in closed-loop simulations using TRANSP, a time dependent transport analysis code, in predictive mode. Promising results for the ongoing experimental implementation of controllers are obtained.",

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AU - Goumiri, I. R.

AU - Rowley, Clarence Worth

AU - Sabbagh, S. A.

AU - Gates, D. A.

AU - Boyer, M. D.

AU - Gerhardt, S. P.

AU - Kolemen, Egemen

AU - Menard, J. E.

PY - 2017/5/1

Y1 - 2017/5/1

N2 - A model-based feedback system is presented enabling the simultaneous control of the stored energy through βn and the toroidal rotation profile of the plasma in National Spherical Torus eXperiment Upgrade device. Actuation is obtained using the momentum from six injected neutral beams and the neoclassical toroidal viscosity generated by applying three-dimensional magnetic fields. Based on a model of the momentum diffusion and torque balance, a feedback controller is designed and tested in closed-loop simulations using TRANSP, a time dependent transport analysis code, in predictive mode. Promising results for the ongoing experimental implementation of controllers are obtained.

AB - A model-based feedback system is presented enabling the simultaneous control of the stored energy through βn and the toroidal rotation profile of the plasma in National Spherical Torus eXperiment Upgrade device. Actuation is obtained using the momentum from six injected neutral beams and the neoclassical toroidal viscosity generated by applying three-dimensional magnetic fields. Based on a model of the momentum diffusion and torque balance, a feedback controller is designed and tested in closed-loop simulations using TRANSP, a time dependent transport analysis code, in predictive mode. Promising results for the ongoing experimental implementation of controllers are obtained.

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Simultaneous feedback control of plasma rotation and stored energy on NSTX-U using neoclassical toroidal viscosity and neutral beam injection

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