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@ARTICLE{Henkel:885563,
      author       = {Henkel, Marion and Li, Y. and Liang, Yunfeng and Drews, P.
                      and Knieps, A. and Killer, C. and Nicolai, D. and Höschen,
                      D. and Geiger, J. and Xiao, C. and Sandri, N. and
                      Satheeswaran, G. and Liu, S. and Grulke, O. and Jakubowski,
                      M. and Brezinsek, S. and Otte, M. and Neubauer, O. and
                      Schweer, B. and Xu, G. and Cai, J.},
      title        = {{R}etarding field analyzer for the wendelstein 7-{X}
                      boundary plasma},
      journal      = {Fusion engineering and design},
      volume       = {157},
      issn         = {0920-3796},
      address      = {New York, NY [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2020-03934},
      pages        = {111623 -},
      year         = {2020},
      abstract     = {A bi-directional multi-channel retarding field analyzer
                      (RFA) probe has been successfully developed for the first
                      time on the Wendelstein 7-X (W7-X) stellarator boundary
                      plasma. Modifications to the RFA prototype hardware and its
                      upgrade for the two W7-X island divertor campaigns are
                      presented, including the electronics. In this paper the
                      experiences and challenges operation and customizing an RFA
                      at W7-X are discussed, as well as the data analysis using a
                      maximum coefficient of determination method to obtain the
                      ion temperature based on the measured modulated ion current.
                      Edge ion temperature profiles have been measured in the
                      standard and high iota configurations. Previous article in
                      issue},
      cin          = {IEK-4},
      ddc          = {530},
      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:000552961900012},
      doi          = {10.1016/j.fusengdes.2020.111623},
      url          = {https://juser.fz-juelich.de/record/885563},
}