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@TECHREPORT{Finken:860985,
      key          = {860985},
      collaboration = {Finken, Karl Heinz and Baelmans, M. and Börner, P. and
                      Evans, T. and Faulconer, D. and Giesen, B. and Haßler, M.
                      and Jensen, T. H. and Kaleck, A. and Koch, Raymond and
                      Küppers, Bettina and Montvai, A. and Nicolai, A. and
                      Reiter, Detlev and Rogister, A. and Samm, Ulrich and Tokar,
                      Mikhail and Van Oost, G. and Wolf, Gerd H.},
      title        = {{D}ynamic {E}rgodic {D}ivertor ({DED}) for {TEXTOR}-94},
      volume       = {3285},
      number       = {Juel-3285},
      address      = {Jülich},
      publisher    = {Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag},
      reportid     = {FZJ-2019-01615, Juel-3285},
      series       = {Berichte des Forschungszentrums Jülich},
      pages        = {201 p.},
      year         = {1996},
      abstract     = {One of the essential problems for the successful operation
                      of a fusion burner is to arrange for the exhaust ofheat and
                      partic1es in such a way that the following requirements are
                      met: (1) the materials and components of the inner wall are
                      not overheated or unduly eroded (2) the pumping system and
                      the geometrical arrangement of the wall components allow
                      sufficient helium removal (3) only limited amounts
                      ofwall-released impurities, recyc1ed helium and injected
                      impurities (foredge radiation cooling) are able to penetrate
                      the boundary layer into the plasma core (4) the methods used
                      to satisfy the above requirements are compatible with a high
                      energy confinement and a practical fuelling scheme. - For
                      the Next Step - lTER, the poloidal divertor is being
                      developed to meet these requirements. Both for widening the
                      understanding of the physics involved in the exhaust issue
                      and for exploring possible alternative or complementing
                      methods of exhausting particle and power, studies are also
                      being undertaken on other concepts, in particular limiter
                      concepts, the ergodic divertor, and the island divertor
                      foreseen for Stellarators (see e.g. W7-X). An additional
                      advantage of this programme strategy is the fact that (i)
                      synergisms exist between different approaches and concepts
                      and (ii) most methods and processes (like diagnostics, wall
                      treatment, modelling, heating) which are developed on one
                      system can be transferred to the others. The stimulating
                      results from the $\textbf{Ergodic Divertor (ED)}$ of TORE
                      SUPRA (Association EURATOM-CEA Cadarache), as well as the
                      ideas and experiments of Takamura et al. have inspired
                      KFA-Jülich and its partners to develop the concept of the
                      $\textbf{Dynamic Ergodie Divertor (DED)}$. The Association
                      EURATOM-KFA Jülich, therefore, proposes to build and
                      install such a system in TEXTOR-94 as an integral part of
                      the research programme of the Trilateral Euregio Cluster
                      (TEC). The beneficial effects of an $\textbf{ED}$, among
                      which improved radiation efficiency of impurities and better
                      impurity screening (TORE SUPRA) are the most significant
                      ones, are due to the combined effects of increased electron
                      density and decreased electron temperature at the plasma
                      boundary in conjunction with enhanced radial transport and
                      reduced sputtering ofimpurities. In the "near field" region
                      ofthe helical coils (creating the multipolar perturbation
                      field) the magnetic field lines are displaced radially even
                      without resonances and ergodization. As a [...]},
      cin          = {PRE-2000},
      cid          = {I:(DE-Juel1)PRE2000-20140101},
      pnm          = {899 - ohne Topic (POF3-899)},
      pid          = {G:(DE-HGF)POF3-899},
      typ          = {PUB:(DE-HGF)3 / PUB:(DE-HGF)29},
      url          = {https://juser.fz-juelich.de/record/860985},
}