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

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    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 languageEnglish
    Title of host publication2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013
    DOIs
    StatePublished - 2013
    Event2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013 - San Francisco, CA, United States
    Duration: Jun 10 2013Jun 14 2013

    Publication series

    Name2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013

    Conference

    Conference2013 IEEE 25th Symposium on Fusion Engineering, SOFE 2013
    Country/TerritoryUnited States
    CitySan Francisco, CA
    Period06/10/1306/14/13

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