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@ARTICLE{Puglia:820495,
      author       = {Puglia, P. and Pires de Sa, W. and Blanchard, P. and
                      Dorling, S. and Dowson, S. and Fasoli, A. and Figueiredo, J.
                      and Galvão, R. and Graham, M. and Jones, G. and Perez von
                      Thun, C. and Porkolab, M. and Ruchko, L. and Testa, D. and
                      Woskov, P. and Albarracin-Manrique, M. A.},
      title        = {{T}he upgraded {JET} toroidal {A}lfvén eigenmode
                      diagnostic system},
      journal      = {Nuclear fusion},
      volume       = {56},
      number       = {11},
      issn         = {1741-4326},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2016-05789},
      pages        = {112020 -},
      year         = {2016},
      abstract     = {The 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.},
      cin          = {IEK-4 / PTJ-MGS},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-4-20101013 / I:(DE-Juel1)PTJ-MGS-20090406},
      pnm          = {174 - Plasma-Wall-Interaction (POF3-174)},
      pid          = {G:(DE-HGF)POF3-174},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000391393900020},
      doi          = {10.1088/0029-5515/56/11/112020},
      url          = {https://juser.fz-juelich.de/record/820495},
}