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@ARTICLE{Zoletnik:873531,
      author       = {Zoletnik, S. and Anda, G. and Biedermann, C. and Carralero,
                      A. D. and Cseh, G. and Dunai, D. and Killer, C. and Kocsis,
                      G. and Krämer-Flecken, A. and Otte, M. and Shanahan, B. and
                      Szepesi, T. and Vecsei, M. and Zsuga, L.},
      title        = {{M}ulti-diagnostic analysis of plasma filaments in the
                      island divertor},
      journal      = {Plasma physics and controlled fusion},
      volume       = {62},
      number       = {1},
      issn         = {1361-6587},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2020-00799},
      pages        = {014017 -},
      year         = {2020},
      abstract     = {Filaments or blobs are well known structures in turbulence
                      in magnetic fusion devices, they are considered to be the
                      major cross-transport channel in the scrape off layer. They
                      originate at the last closed magnetic flux surface and
                      propagate out on the low field side of toroidal devices due
                      to polarization in the curved magnetic field. The
                      Wendelstein 7-X stellarator has a complex three-dimensional
                      magnetic field structure and additionally the plasma is
                      bounded by a chain of magnetic islands, forming an island
                      divertor. After the first observation of filaments in
                      Wendelstein 7-X with video cameras a multi-diagnostic study
                      is presented in this paper to reveal their 3D structure and
                      dynamics. Filaments are seen to be born at the edge and, at
                      least in some cases, seen to extend to up to 4 toroidal
                      turns. After moving radially out a few cm they enter the
                      edge island. Here they disappear from the equatorial plane
                      and about 200 microseconds later reappear on the outboard
                      side of the island. A long-wavelength (~20–30 cm) quasi
                      coherent mode is observed in both regions where filaments
                      appear. The similarities and differences between the
                      filaments seen in W7-X and other devices are discussed.
                      Possible explanations for this strange radial propagation
                      are considered, together with the likely role of filaments
                      in the edge and island density profile.},
      cin          = {IEK-4},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {174 - Plasma-Wall-Interaction (POF3-174)},
      pid          = {G:(DE-HGF)POF3-174},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000499376700001},
      doi          = {10.1088/1361-6587/ab5241},
      url          = {https://juser.fz-juelich.de/record/873531},
}