Výsledky vyhledávání - "Ben G. Penaflor"

Optimal current profile control for enhanced repeatability of L-mode and H-mode discharges in DIII-D

Autor: Tim C. Luce, C. T. Holcomb, Justin Barton, Robert D. Johnson, Ben G. Penaflor, William Wehner, David Humphreys, Eugenio Schuster, J.R. Ferron, M Menno Lauret, Michael L. Walker

Publikováno v: Fusion Engineering and Design. 123:513-517

In this work, model-based control techniques are used to obtain target current profiles in low-confinement-mode (L-mode) as well as high-confinement-mode (H-mode) DIII-D discharges. The control problem is formulated as a trajectory optimization probl

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::5c4d17c7326652fe9e5a1910b0c6883f
https://doi.org/10.1016/j.fusengdes.2017.03.022

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Backstepping Control of the Toroidal Plasma Current Profile in the DIII-D Tokamak

Autor: Robert D. Johnson, T.C. Luce, Justin Barton, Eugenio Schuster, Ben G. Penaflor, Michael L. Walker, J.R. Ferron, David Humphreys, Mark D. Boyer

Publikováno v: IEEE Transactions on Control Systems Technology. 22:1725-1739

One of the most promising devices for realizing power production through nuclear fusion is the tokamak. To maximize performance, it is preferable that tokamak reactors achieve advanced operating scenarios characterized by good plasma confinement, imp

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::7abbe5c9a7fc3b5302874d7b49257435
https://doi.org/10.1109/tcst.2013.2296493

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Nonlinear Physics-model-based Actuator Trajectory Optimization for Advanced Scenario Planning in the DIII-D Tokamak

Autor: Tim C. Luce, Michael L. Walker, Ben G. Penaflor, Justin Barton, Eugenio Schuster, David Humphreys, Robert D. Johnson, Wenyu Shi, J.R. Ferron, Francesca Turco

Publikováno v: IFAC Proceedings Volumes. 47:671-676

Extensive research has been conducted to find operating scenarios that optimize the plasma performance in nuclear fusion tokamak devices with the goal of enabling the success of the ITER project. The development, or planning, of these advanced scenar

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::db48c4d966a116e8bab76e39db3c5d8f
https://doi.org/10.3182/20140824-6-za-1003.01710

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First-Principles-Driven Model-Based Control of the Poloidal Magnetic Flux Profile at the DIII-D Tokamak

Autor: Michael L. Walker, David Humphreys, Justin Barton, Wenyu Shi, Tim C. Luce, Francesca Turco, Eugenio Schuster, J.R. Ferron, Ben G. Penaflor, William Wehner, Robert D. Johnson

Publikováno v: IFAC Proceedings Volumes. 47:10319-10324

Efficient, high-gain operation of a tokamak device requires the achievement of certain radial shapes for the toroidal current profile. The evolution in time of the toroidal current profile in tokamaks is related to the evolution of the poloidal magne

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::559d474cd3148a0199bd6ef8eead7326
https://doi.org/10.3182/20140824-6-za-1003.02548

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Experimental and Simulation Testing of Physics-model-based Safety Factor Profile and Internal Energy Feedback Controllers in DIII-D Advanced Tokamak Scenarios

Autor: Ben G. Penaflor, William Wehner, Justin Barton, Michael L. Walker, Mark D. Boyer, Tim C. Luce, Robert D. Johnson, Francesca Turco, J.R. Ferron, David Humphreys, Eugenio Schuster, Wenyu Shi

Publikováno v: IFAC Proceedings Volumes. 47:5223-5228

Active closed-loop control of the plasma safety factor profile ( q -profile) and internal energy dynamics in nuclear fusion tokamak devices has the potential to significantly impact the success of the ITER project. These plasma properties are related

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::51150aca7457ed9acf155ee5435d2ba0
https://doi.org/10.3182/20140824-6-za-1003.01718

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Current profile control for the development of consistent discharges in DIII-D

Autor: Eugenio Schuster, Ben G. Penaflor, William Wehner, Michael L. Walker, Justin Barton, Tim C. Luce, J.R. Ferron, David Humphreys, Robert D. Johnson, Mark D. Boyer

Publikováno v: CDC

The number of tokamak discharges required to carry out meaningful experiments can be significantly reduced by current profile control in the early startup phase. The tokamak is a plasma-confinement device, suitable for confining plasma at the requisi

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::dd40fe47e121a7b3aae8e771ac68b544
https://doi.org/10.1109/cdc.2015.7402608

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PTRANSP simulation and experimental test of a robust current profile and βN controller for off-axis current drive scenarios in the DIII-D tokamak

Autor: Justin Barton, J.R. Ferron, Robert D. Johnson, Mark D. Boyer, Eugenio Schuster, Michael L. Walker, David Humphreys, Wenyu Shi, Didier Moreau, Tim C. Luce, Ben G. Penaflor, Arnold H. Kritz, William Wehner

Publikováno v: ACC

During the tokamak discharge, especially the ramp-up phase, the plasma state equilibrium continually evolves. As a consequence, the plasma response model should evolve as well. We first identified a linear plasma response model of the rotational tran

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4b27007549a5abb36532afe54a2b552f
https://doi.org/10.1109/acc.2013.6580003

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Identification and control of magneto-kinetic response during advanced tokamak scenarios in DIII-D

Autor: J.R. Ferron, Didier Moreau, Michael L. Walker, Robert D. Johnson, David Humphreys, Wenyu Shi, Eugenio Schuster, Ben G. Penaflor, William Wehner, Tim C. Luce

Publikováno v: ACC

The paper proposes a model-based control approach for the coupled evolution of the poloidal magnetic flux profile and the normalized pressure ratio βN. The model is determined by a system identification method which is shown to sufficiently reproduc

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::a095e2ff5917489c1fa53133c33c6e16
https://doi.org/10.1109/acc.2013.6580002

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A two-time-scale model-based combined magnetic and kinetic control system for advanced tokamak scenarios on DIII-D

Autor: Didier Moreau, Robert D. Johnson, Justin Barton, Ben G. Penaflor, William Wehner, Eugenio Schuster, Tim C. Luce, J.R. Ferron, Michael L. Walker, Mark D. Boyer, David Humphreys, Wenyu Shi

Publikováno v: CDC

System identification techniques have been successfully used to obtain linear dynamic plasma response models around a particular equilibrium in different tokamaks. This paper identifies a two-time-scale dynamic model of the rotational transform ι pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::4b888793dc6aa89be0f0f32d77dcfc99
https://doi.org/10.1109/cdc.2012.6426330

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Current profile tracking for the DIII-D tokamak via LQI optimal control

Autor: Tim C. Luce, Michael L. Walker, Eugenio Schuster, Ben G. Penaflor, Justin Barton, J.R. Ferron, Robert D. Johnson, David Humphreys, Mark D. Boyer

Publikováno v: CDC

In tokamak fusion plasmas, controlling the spatial distribution profile of the toroidal current is key to achieving advanced scenarios characterized by confinement improvement and possible steady-state operation. The dynamics of the current profile a

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ec6ce777bbc9d8d1990ddb890778e09d
https://doi.org/10.1109/cdc.2012.6426342

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