Implementation of advanced feedback control algorithms for controlled resonant magnetic perturbation physics studies on EXTRAP T2R
2011 (English)In: Nuclear Fusion, ISSN 0029-5515, E-ISSN 1741-4326, Vol. 51, no 6, 063018- p.Article in journal (Refereed) Published
The EXTRAP T2R feedback system (active coils, sensor coils and controller) is used to study and develop new tools for advanced control of the MHD instabilities in fusion plasmas. New feedback algorithms developed in EXTRAP T2R reversed-field pinch allow flexible and independent control of each magnetic harmonic. Methods developed in control theory and applied to EXTRAP T2R allow a closed-loop identification of the machine plant and of the resistive wall modes growth rates. The plant identification is the starting point for the development of output-tracking algorithms which enable the generation of external magnetic perturbations. These algorithms will then be used to study the effect of a resonant magnetic perturbation (RMP) on the tearing mode (TM) dynamics. It will be shown that the stationary RMP can induce oscillations in the amplitude and jumps in the phase of the rotating TM. It will be shown that the RMP strongly affects the magnetic island position.
Place, publisher, year, edition, pages
2011. Vol. 51, no 6, 063018- p.
IdentifiersURN: urn:nbn:se:kth:diva-34365DOI: 10.1088/0029-5515/51/6/063018ISI: 000290788200020ScopusID: 2-s2.0-79957597910OAI: oai:DiVA.org:kth-34365DiVA: diva2:429739
QC 201107052011-07-052011-06-072011-07-05Bibliographically approved