Enhancing current density profile control in tokamak experiments using iterative learning control

F.A.A. Felici, T.A.E. Oomen

Onderzoeksoutput: Hoofdstuk in Boek/Rapport/CongresprocedureConferentiebijdrageAcademicpeer review

10 Citaten (Scopus)
1 Downloads (Pure)

Samenvatting

Tokamaks are toroidal devices to create and confine high-temperature plasmas, and are presently at the forefront of nuclear fusion research. Many parameters in a tokamak are feedback controlled, but some quantities that are either difficult to measure or difficult to control are still controlled by trial-and-error adjustments of feedforward signals. For example, the current density profile plays an essential role in the confinement and stability properties of a tokamak plasma but only few demonstrations exist of feedback control, partly due to the unavailability of the measured variables in real-time on many tokamaks. The aim of this paper it to enhance the control of the current density profile by using batch-to-batch control. An iterative learning controller (ILC) is designed for the current density profile control problem. A simulation study for the future ITER tokamak is shown in which ILC is used to obtain a desired current density profile at the end of the plasma ramp-up phase. Experimental application of ILC to plasma discharges in the TCV tokamak is presented, where the time trajectory of the plasma internal inductance, a scalar measure of the current density profile width, is controlled by varying the total plasma current. Both demonstrate the feasibility of the proposed approach and encourage more extensive use of ILC in tokamak experiments.
Originele taal-2Engels
Titel54th IEEE Conference on Decision and Control, December 15-18, 2015, Osaka, Japan
Plaats van productiePiscataway
UitgeverijInstitute of Electrical and Electronics Engineers
Pagina's5370-5377
ISBN van elektronische versie978-1-4799-7886-1
ISBN van geprinte versie978-1-4799-7884-7
DOI's
StatusGepubliceerd - 2015
Evenement54th IEEE Conference on Decision and Control (CDC 2015) - "Osaka International Convention Center", Osaka, Japan
Duur: 15 dec 201518 dec 2015
Congresnummer: 54
http://www.cdc2015.ctrl.titech.ac.jp/

Congres

Congres54th IEEE Conference on Decision and Control (CDC 2015)
Verkorte titelCDC 2015
LandJapan
StadOsaka
Periode15/12/1518/12/15
Anderthe 54th IEEE Conference on Decision and Control
Internet adres

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