Fluctuation mitigation and azimuthal velocity profile regulation by extremum seeking in HELCAT

Zeki Okan Ilhan; Jason Barry; Hexiang Wang; Eugenio Schuster; Mark Gilmore; Andrew Ware

doi:10.1109/SOFE.2013.6635479

Fluctuation mitigation and azimuthal velocity profile regulation by extremum seeking in HELCAT

Zeki Okan Ilhan, Jason Barry, Hexiang Wang, Eugenio Schuster, Mark Gilmore, Andrew Ware

Physics and Astronomy

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Scopus citations

Abstract

Turbulence, and turbulence-driven transport are ubiquitous in magnetically confined plasmas, where there is an intimate relationship between turbulence, transport, destabilizing mechanisms like gradients and currents, and stabilizing mechanisms like shear. Active control of fluctuations via manipulation of flow profiles is investigated in a magnetized laboratory plasma device (HELCAT). Measurements of the azimuthal velocity are assumed available at several radial points within the plasma and E × B flow profiles are controlled via biased ring electrodes. An optimal control algorithm is proposed in this work to reproduce as closely as possible a prescribed desired radial azimuthal velocity profile. The effectiveness of the controller is analyzed via numerical simulations.

Original language	English
Title of host publication	2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013
DOIs	https://doi.org/10.1109/SOFE.2013.6635479
State	Published - 2013
Event	2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013 - San Francisco, CA, United States Duration: Jun 10 2013 → Jun 14 2013

Publication series

Name	2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013

Conference

Conference	2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013
Country/Territory	United States
City	San Francisco, CA
Period	06/10/13 → 06/14/13

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10.1109/SOFE.2013.6635479

Cite this

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title = "Fluctuation mitigation and azimuthal velocity profile regulation by extremum seeking in HELCAT",

abstract = "Turbulence, and turbulence-driven transport are ubiquitous in magnetically confined plasmas, where there is an intimate relationship between turbulence, transport, destabilizing mechanisms like gradients and currents, and stabilizing mechanisms like shear. Active control of fluctuations via manipulation of flow profiles is investigated in a magnetized laboratory plasma device (HELCAT). Measurements of the azimuthal velocity are assumed available at several radial points within the plasma and E × B flow profiles are controlled via biased ring electrodes. An optimal control algorithm is proposed in this work to reproduce as closely as possible a prescribed desired radial azimuthal velocity profile. The effectiveness of the controller is analyzed via numerical simulations.",

author = "Ilhan, {Zeki Okan} and Jason Barry and Hexiang Wang and Eugenio Schuster and Mark Gilmore and Andrew Ware",

year = "2013",

doi = "10.1109/SOFE.2013.6635479",

language = "English",

isbn = "9781479901715",

series = "2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013",

booktitle = "2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013",

note = "2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013 ; Conference date: 10-06-2013 Through 14-06-2013",

}

Ilhan, ZO, Barry, J, Wang, H, Schuster, E, Gilmore, M & Ware, A 2013, Fluctuation mitigation and azimuthal velocity profile regulation by extremum seeking in HELCAT. in 2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013., 6635479, 2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013, 2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013, San Francisco, CA, United States, 06/10/13. https://doi.org/10.1109/SOFE.2013.6635479

Fluctuation mitigation and azimuthal velocity profile regulation by extremum seeking in HELCAT. / Ilhan, Zeki Okan; Barry, Jason; Wang, Hexiang et al.
2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013. 2013. 6635479 (2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

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T1 - Fluctuation mitigation and azimuthal velocity profile regulation by extremum seeking in HELCAT

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AU - Gilmore, Mark

AU - Ware, Andrew

PY - 2013

Y1 - 2013

N2 - Turbulence, and turbulence-driven transport are ubiquitous in magnetically confined plasmas, where there is an intimate relationship between turbulence, transport, destabilizing mechanisms like gradients and currents, and stabilizing mechanisms like shear. Active control of fluctuations via manipulation of flow profiles is investigated in a magnetized laboratory plasma device (HELCAT). Measurements of the azimuthal velocity are assumed available at several radial points within the plasma and E × B flow profiles are controlled via biased ring electrodes. An optimal control algorithm is proposed in this work to reproduce as closely as possible a prescribed desired radial azimuthal velocity profile. The effectiveness of the controller is analyzed via numerical simulations.

AB - Turbulence, and turbulence-driven transport are ubiquitous in magnetically confined plasmas, where there is an intimate relationship between turbulence, transport, destabilizing mechanisms like gradients and currents, and stabilizing mechanisms like shear. Active control of fluctuations via manipulation of flow profiles is investigated in a magnetized laboratory plasma device (HELCAT). Measurements of the azimuthal velocity are assumed available at several radial points within the plasma and E × B flow profiles are controlled via biased ring electrodes. An optimal control algorithm is proposed in this work to reproduce as closely as possible a prescribed desired radial azimuthal velocity profile. The effectiveness of the controller is analyzed via numerical simulations.

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DO - 10.1109/SOFE.2013.6635479

M3 - Conference contribution

AN - SCOPUS:84890532328

SN - 9781479901715

T3 - 2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013

BT - 2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013

T2 - 2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013

Y2 - 10 June 2013 through 14 June 2013

ER -

Fluctuation mitigation and azimuthal velocity profile regulation by extremum seeking in HELCAT

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