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@ARTICLE{Spolaore:865955,
      author       = {Spolaore, M. and Agostinetti, P. and Killer, C. and
                      Moresco, M. and Brombin, M. and Cavazzana, R. and
                      Ghirardelli, R. and Grenfell, G. and Grulke, O. and
                      Lazerson, S. A. and Martines, E. and Neubauer, O. and
                      Nicolai, D. and Satheeswaran, G. and Schweer, B. and
                      Vianello, N. and Visentin, M.},
      title        = {{H}igh {R}esolution {P}robe for filament transport and
                      current density study at the edge region of {W}7-{X}},
      journal      = {Journal of Instrumentation},
      volume       = {14},
      number       = {09},
      issn         = {1748-0221},
      address      = {London},
      publisher    = {Inst. of Physics},
      reportid     = {FZJ-2019-05221},
      pages        = {C09035 - C09035},
      year         = {2019},
      abstract     = {For the study of electrostatic and magnetic properties of
                      filaments characterizing the edge region of the stellarator
                      experiment W7-X, a specifically designed insertable probe
                      head was constructed within the framework of EUROfusion
                      WP.S1 work package in collaboration between Consorzio RFX,
                      IPP Greifswald and Forschungszentrum Jülich. The probe
                      head, named High Resolution Probe (HRP), was conceived to be
                      installed on the mid-plane multi-purpose fast reciprocating
                      manipulator on W7-X. Electromagnetic filamentary turbulent
                      structures are found to characterize the edge region of
                      different magnetic configurations including Reversed Field
                      Pinch, stellarator and tokamak, where strong currents are
                      associated also to ELM filamentary structures. The study of
                      those phenomena in W7-X stellarator is of particular
                      interest as the electromagnetic features of filaments are
                      expected to become more relevant with the increase of the
                      local plasma beta. In particular the aim is to provide
                      information about the presence and the features of parallel
                      current density associated to filamentary turbulent or
                      ELM-like structures. Furthermore, the possibility to measure
                      the time evolution of the flow radial profiles using the
                      Mach probe array was considered as a further interesting
                      part of the study, given the strong interplay expected
                      between the turbulent fluctuations and the average flows.
                      Further important information provided is the radial
                      propagation of turbulent flux. The contribution will present
                      the design development, the $R\&D$ studies and the applied
                      solutions for the sensors embedded in the probe head. In
                      particular, the presence of 140 GHz ECRH plasma environment
                      represents one of the main challenges for reliable magnetic
                      fluctuation measurements. First measurements were performed
                      during the W7-X experimental campaign OP1.2b, where
                      electromagnetic features of turbulence were measured with
                      the probe, at different magnetic configurations.},
      cin          = {IEK-4},
      ddc          = {610},
      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:000486989800035},
      doi          = {10.1088/1748-0221/14/09/C09035},
      url          = {https://juser.fz-juelich.de/record/865955},
}