000820495 001__ 820495 000820495 005__ 20240711113601.0 000820495 0247_ $$2doi$$a10.1088/0029-5515/56/11/112020 000820495 0247_ $$2ISSN$$a0029-5515 000820495 0247_ $$2ISSN$$a1741-4326 000820495 0247_ $$2WOS$$aWOS:000391393900020 000820495 0247_ $$2altmetric$$aaltmetric:12936315 000820495 037__ $$aFZJ-2016-05789 000820495 082__ $$a530 000820495 1001_ $$0P:(DE-HGF)0$$aPuglia, P.$$b0 000820495 245__ $$aThe upgraded JET toroidal Alfvén eigenmode diagnostic system 000820495 260__ $$aVienna$$bIAEA$$c2016 000820495 3367_ $$2DRIVER$$aarticle 000820495 3367_ $$2DataCite$$aOutput Types/Journal article 000820495 3367_ $$0PUB:(DE-HGF)16$$2PUB:(DE-HGF)$$aJournal Article$$bjournal$$mjournal$$s1478267959_17700 000820495 3367_ $$2BibTeX$$aARTICLE 000820495 3367_ $$2ORCID$$aJOURNAL_ARTICLE 000820495 3367_ $$00$$2EndNote$$aJournal Article 000820495 520__ $$aThe main characteristics of toroidal Alfvén eigenmodes (TAEs) have been successfully investigated in JET (Joint European Torus) using the scheme of sweeping-frequency external excitation with tracking of the synchronously-detected resonances. However, due to technical limitations, only modes with low values of the toroidal mode number $n\leqslant 7$ could be effectively excited and unambiguously identified by the Alfvén Eigenmode Active Diagnostic (AEAD) system. This represents a serious restriction because theoretical models indicate that medium-n Alfvén eigenmodes (AEs) are the most prone to be destabilized by energetic particles in ignited plasmas and, therefore, reliable measurement of their damping rates remains a relevant issue to properly access their effect in ignited plasmas. For this reason, a major upgrade of the AEAD system has been carried out aiming at providing a state-of-the-art excitation and real-time detection system for the planned DT campaign in JET. This required the development of a new type of radio frequency amplifier and filter, not commercially available, and also a control system. In this paper, details of the concepts that are relevant to understand the operation of the new system in the next experimental campaigns are presented, as are the results of numerical simulations to model its performance. 000820495 536__ $$0G:(DE-HGF)POF3-174$$a174 - Plasma-Wall-Interaction (POF3-174)$$cPOF3-174$$fPOF III$$x0 000820495 588__ $$aDataset connected to CrossRef 000820495 7001_ $$0P:(DE-HGF)0$$aPires de Sa, W.$$b1 000820495 7001_ $$0P:(DE-HGF)0$$aBlanchard, P.$$b2 000820495 7001_ $$0P:(DE-HGF)0$$aDorling, S.$$b3 000820495 7001_ $$0P:(DE-HGF)0$$aDowson, S.$$b4 000820495 7001_ $$0P:(DE-HGF)0$$aFasoli, A.$$b5 000820495 7001_ $$0P:(DE-HGF)0$$aFigueiredo, J.$$b6 000820495 7001_ $$0P:(DE-HGF)0$$aGalvão, R.$$b7 000820495 7001_ $$0P:(DE-HGF)0$$aGraham, M.$$b8 000820495 7001_ $$0P:(DE-HGF)0$$aJones, G.$$b9 000820495 7001_ $$0P:(DE-HGF)0$$aPerez von Thun, C.$$b10$$eCorresponding author 000820495 7001_ $$0P:(DE-HGF)0$$aPorkolab, M.$$b11 000820495 7001_ $$0P:(DE-HGF)0$$aRuchko, L.$$b12 000820495 7001_ $$0P:(DE-Juel1)159340$$aTesta, D.$$b13$$ufzj 000820495 7001_ $$0P:(DE-HGF)0$$aWoskov, P.$$b14 000820495 7001_ $$0P:(DE-HGF)0$$aAlbarracin-Manrique, M. 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