@prefix pubblicazioni: . @prefix unitaDiPersonaleInterno: . @prefix prodotto: . unitaDiPersonaleInterno:MATRICOLA39229 pubblicazioni:autoreCNRDi prodotto:ID25794 . @prefix prodottidellaricerca: . @prefix istituto: . istituto:CDS037 prodottidellaricerca:prodotto prodotto:ID25794 . unitaDiPersonaleInterno:MATRICOLA16968 pubblicazioni:autoreCNRDi prodotto:ID25794 . @prefix rdf: . prodotto:ID25794 rdf:type prodotto:TIPO1101 . @prefix retescientifica: . prodotto:ID25794 rdf:type retescientifica:ProdottoDellaRicerca . @prefix rdfs: . prodotto:ID25794 rdfs:label "Electromagnetic modeling for the active control of MHD modes in RFX (Articolo in rivista)"@en . @prefix xsd: . prodotto:ID25794 pubblicazioni:anno "2003-01-01T00:00:00+01:00"^^xsd:gYear . @prefix skos: . prodotto:ID25794 skos:altLabel "
G. Marchiori 1, M. Cavinato 4, A. Masiello 2, R. Paccagnella 1 (2003)
Electromagnetic modeling for the active control of MHD modes in RFX
in Fusion engineering and design
"^^rdf:HTML ; pubblicazioni:autori "G. Marchiori 1, M. Cavinato 4, A. Masiello 2, R. Paccagnella 1"^^xsd:string ; pubblicazioni:paginaInizio "691"^^xsd:string ; pubblicazioni:paginaFine "696"^^xsd:string ; pubblicazioni:altreInformazioni "The RFX experiment, is the most important machine of Reversed Field Pinch (RFP) type in the world. This magnetic configuration is actively studed in Europe, USA and Japan for its potential as a scheme of low magnetic field reactor and for interesting scientific properties of the plasma. In the paper an original electromagnetic model specifically developed for the design of an active control system of plasma MHD modes is presented. The model proved sufficiently flexible to be easily modified to describe EXTRAP-T2R, another RFP device operating at KTH in Stockholm. A validation experimental campaign was successfully carried out on T2R in the last months (M. Cavinato et al., \u0093First results of an integrated multi-variable electromagnetic model for resistive wall mode control in fusion devices\u0094, 21st SOFE, S. Diego, October 2003). FED is one of the two major journals for publication of engineering research results in the field of controlled thermonuclear fusion."^^xsd:string ; pubblicazioni:numeroVolume "66-68"^^xsd:string . @prefix ns10: . prodotto:ID25794 pubblicazioni:rivista ns10:ID479135 ; pubblicazioni:note "Universit\u00E0 di Padova, CNR ed ENEA hanno costituito il Consorzio RFX per realizzare congiuntamente attivit\u00E0 di ricerca sulla fusione nucleare controllata. Il personale resta dipendente dal proprio ente, precisato nel campo"^^xsd:string ; pubblicazioni:descrizioneSinteticaDelProdotto "The new RFX load assembly is characterized by a thin copper shell with a 50 ms time constant for the vertical field penetration, and 192 saddle coils, individually controlled, which cover the whole surface of the torus.\nThe active control of Resistive Wall Modes is considered a basic issue to extend the pulse duration to its nominal value. Experimental results are expected to be of interest for Tokamak devices, as well. An open loop state space model was developed in view of the simultaneous control of different harmonic components of the magnetic field. It integrates a model of the saddle coil system and a linear model of the plasma MHD evolution. A lumped electromagnetic parameter representation of the saddle coil system was adopted and the coupling terms were calculated taking into account the presence of passive conductors such as vessel and shell. The plasma MHD behaviour is given in terms of the harmonic components, including the aliasing effects (\u0093sidebands\u0094) due to the \u0093finite\u0094 number of actuators and sensors. The state space representation was chosen since it is particularly suited for the design of multivariable control system and is numerically more robust. Reduction techniques have also been tested in order to obtain lower order models for the control system design while retaining the basic static and dynamic properties."^^xsd:string ; skos:note "ISI Web of Science (WOS)"^^xsd:string ; pubblicazioni:affiliazioni "1 CNR,\n2 UniPD,\n3 ENEA,\n4 Consorzio RFX (dipendenti),\n(i dipendenti di 1-2-3 sono anche affiliati al Consorzio)"^^xsd:string ; pubblicazioni:titolo "Electromagnetic modeling for the active control of MHD modes in RFX"^^xsd:string ; prodottidellaricerca:abstract "The new RFX load assembly is characterized by a thin copper shell with a 50 ms time constant for the vertical field penetration, and 192 saddle coils, individually controlled, which cover the whole surface of the torus.\nThe active control of Resistive Wall Modes is considered a basic issue to extend the pulse duration to its nominal value. Experimental results are expected to be of interest for Tokamak devices, as well. An open loop state space model was developed in view of the simultaneous control of different harmonic components of the magnetic field. It integrates a model of the saddle coil system and a linear model of the plasma MHD evolution. A lumped electromagnetic parameter representation of the saddle coil system was adopted and the coupling terms were calculated taking into account the presence of passive conductors such as vessel and shell. The plasma MHD behaviour is given in terms of the harmonic components, including the aliasing effects (\u0093sidebands\u0094) due to the \u0093finite\u0094 number of actuators and sensors. The state space representation was chosen since it is particularly suited for the design of multivariable control system and is numerically more robust. Reduction techniques have also been tested in order to obtain lower order models for the control system design while retaining the basic static and dynamic properties." ; prodottidellaricerca:prodottoDi istituto:CDS037 ; pubblicazioni:autoreCNR unitaDiPersonaleInterno:MATRICOLA39229 , unitaDiPersonaleInterno:MATRICOLA16968 . @prefix parolechiave: . prodotto:ID25794 parolechiave:insiemeDiParoleChiave . ns10:ID479135 pubblicazioni:rivistaDi prodotto:ID25794 . parolechiave:insiemeDiParoleChiaveDi prodotto:ID25794 .