Systematic design and simulation of a tearing mode suppression feedback control system for the TEXTOR tokamak

TitleSystematic design and simulation of a tearing mode suppression feedback control system for the TEXTOR tokamak
Publication TypeJournal Article
Year of Publication2012
AuthorsB.A. Hennen, E. Westerhof, P Nuij, MR de Baar, M. Steinbuch
JournalNuclear Fusion
Volume52
Number7
Pagination074009
Date PublishedJul
Type of ArticleArticle
ISBN Number0029-5515
KeywordsDYNAMIC ERGODIC DIVERTOR, STABILIZATION
Abstract

Suppression of tearing modes is essential for the operation of tokamaks. This paper describes the design and simulation of a tearing mode suppression feedback control system for the TEXTOR tokamak. The two main control tasks of this feedback control system are the radial alignment of electron cyclotron resonance heating and current drive (ECRH/ECCD) with a tearing mode and the stabilization of a mode at a specific width. In order to simulate these control tasks, the time evolution of a tearing mode subject to suppression by ECRH/ECCD and destabilization by a magnetic perturbation field is modelled using the generalized Rutherford equation. The model includes an equilibrium model and an ECRH/ECCD launcher model. The dynamics and static equilibria of this model are analysed. The model is linearized and based on the linearized model, linear feedback controllers are designed and simulated, demonstrating both alignment and width control of tearing modes in TEXTOR.

DOI10.1088/0029-5515/52/7/074009
Division

FP

Department

TP

PID

b03bb4fe89a1273778c394f62033c0f5

Alternate TitleNucl. Fusion
LabelOA

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