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

Goumiri, I. R.; Rowley, C. W.; Sabbagh, S. A.; Gates, D. A.; Boyer, M. D.; Gerhardt, S. P.; Kolemen, E.; Menard, J. E.

doi:10.1063/1.4976853

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

Journal Article · Thu Feb 23 00:00:00 EST 2017 · Physics of Plasmas

DOI:https://doi.org/10.1063/1.4976853· OSTI ID:1367371

Goumiri, I. R. ^[1];

^[2]; Sabbagh, S. A. ^[3];

^[4];

^[4]; Kolemen, E. ^[4];

^[4]

Univ. of Wisconsin, Madison, WI (United States)
Princeton Univ., Princeton, NJ (United States)
Columbia Univ., New York, NY (United States)
Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)

In this study, 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.

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Research Organization:: Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: AC02-09CH11466; FG02-99ER54524

OSTI ID:: 1367371

Alternate ID(s):: OSTI ID: 1361784

Report Number(s):: PPPL-5362; PHPAEN

Journal Information:: Physics of Plasmas, Vol. 24, Issue 5; Conference: 58th Annual Meeting of the APS-Division-of-Plasma-Physics (DPP), San Jose, CA (United States), 31 Oct - 4 Nov 2016; ISSN 1070-664X

Publisher:: American Institute of Physics (AIP)Copyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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Cited By (5)

Feedback control design for non-inductively sustained scenarios in NSTX-U using TRANSP Boyer, M. D.; Andre, R. G.; Gates, D. A. Nuclear Fusion, Vol. 57, Issue 6 https://doi.org/10.1088/1741-4326/aa68e9	journal	April 2017
Plasma boundary shape control and real-time equilibrium reconstruction on NSTX-U Boyer, M. D.; Battaglia, D. J.; Mueller, D. Nuclear Fusion, Vol. 58, Issue 3 https://doi.org/10.1088/1741-4326/aaa4d0	journal	January 2018
Real-time capable modeling of neutral beam injection on NSTX-U using neural networks Boyer, M. D.; Kaye, S.; Erickson, K. Nuclear Fusion, Vol. 59, Issue 5 https://doi.org/10.1088/1741-4326/ab0762	journal	March 2019
A Reduced Resistive Wall Mode Kinetic Stability Model for Disruption Forecasting Berkery, J. W.; Sabbagh, S. A.; Bell, R. E. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States) https://doi.org/10.11578/1367870	dataset	January 2017
A Reduced Resistive Wall Mode Kinetic Stability Model for Disruption Forecasting Berkery, J.; Sabbagh, S.; Bell, R. Princeton Plasma Physics Laboratory (PPPL), Princeton, NJ (United States) https://doi.org/10.11578/1562093	dataset	January 2017

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