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dc.contributor.authorMantsinen, Mervi
dc.contributor.authorBilato, Roberto
dc.contributor.authorBobkov, Volodymyr
dc.contributor.authorKappatou, Athina
dc.contributor.authorMcDermott, Rachel
dc.contributor.authorNocente, Massimo
dc.contributor.authorOdstrcil, Tomas
dc.contributor.authorTardini, Giovanni
dc.contributor.authorBernert, Matthias
dc.contributor.authorDux, Ralph
dc.contributor.authorHellsten, Torbjörn
dc.contributor.authorMantica, Paola
dc.contributor.authorMaraschek, Marc
dc.contributor.authorNielsen, Stefan K.
dc.contributor.authorNoterdaeme, Jean-Marie
dc.contributor.authorRasmussen, Jens
dc.contributor.authorRyter, François
dc.contributor.authorStejner, Morten
dc.contributor.authorStober, Jörg
dc.contributor.authorTardocchi, Marco
dc.contributor.authorThe ASDEX Upgrade Team and the EUROfusion MST1 Team
dc.contributor.otherBarcelona Supercomputing Center
dc.identifier.citationMantsinen, Mervi [et al.]. Bulk ion heating with ICRF waves in tokamaks. A: Radio frequency power in plasmas: Proceedings of the 21st Topical Conference, 27-29 April 2015. "AIP Conference Proceedings". AIP, 2015.
dc.description.abstractHeating with ICRF waves is a well-established method on present-day tokamaks and one of the heating systems foreseen for ITER. However, further work is still needed to test and optimize its performance in fusion devices with metallic high-Z plasma facing components (PFCs) in preparation of ITER and DEMO operation. This is of particular importance for the bulk ion heating capabilities of ICRF waves. Efficient bulk ion heating with the standard ITER ICRF scheme, i.e. the second harmonic heating of tritium with or without 3He minority, was demonstrated in experiments carried out in deuterium-tritium plasmas on JET and TFTR and is confirmed by ICRF modelling. This paper focuses on recent experiments with 3He minority heating for bulk ion heating on the ASDEX Upgrade (AUG) tokamak with ITER-relevant all-tungsten PFCs. An increase of 80% in the central ion temperature Ti from 3 to 5.5 keV was achieved when 3 MW of ICRF power tuned to the central 3He ion cyclotron resonance was added to 4.5 MW of deuterium NBI. The radial gradient of the Ti profile reached locally values up to about 50 keV/m and the normalized logarithmic ion temperature gradients R/LTi of about 20, which are unusually large for AUG plasmas. The large changes in the Ti profiles were accompanied by significant changes in measured plasma toroidal rotation, plasma impurity profiles and MHD activity, which indicate concomitant changes in plasma properties with the application of ICRF waves. When the 3He concentration was increased above the optimum range for bulk ion heating, a weaker peaking of the ion temperature profile was observed, in line with theoretical expectations.
dc.description.sponsorshipThis work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014-2018 under grant agreement No 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.
dc.format.extent8 p.
dc.subjectÀrees temàtiques de la UPC::Enginyeria biomèdica
dc.subject.lcshRadio frequency identification systems
dc.subject.otherIon cyclotron resonance frequency (ICRF)
dc.subject.otherHeating systems foreseen
dc.subject.otherPlasma facing components (PFCs)
dc.titleBulk ion heating with ICRF waves in tokamaks
dc.typeConference report
dc.description.peerreviewedPeer Reviewed
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/633053/EU/Implementation of activities described in the Roadmap to Fusion during Horizon 2020 through a Joint programme of the members of the EUROfusion consortium/EUROfusion
upcommons.citation.contributorRadio frequency power in plasmas: Proceedings of the 21st Topical Conference, 27-29 April 2015
upcommons.citation.publicationNameAIP Conference Proceedings

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