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@ARTICLE{Reiser:827856,
      author       = {Reiser, D. and Eich, T.},
      title        = {{D}rift-based scrape-off particle width in {X}-point
                      geometry},
      journal      = {Nuclear fusion},
      volume       = {57},
      number       = {4},
      issn         = {1741-4326},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2017-01944},
      pages        = {046011 -},
      year         = {2017},
      abstract     = {The Goldston heuristic estimate of the scrape-off layer
                      width (Goldston 2012 Nucl. Fusion 52 013009) is reconsidered
                      using a fluid description for the plasma dynamics. The basic
                      ingredient is the inclusion of a compressible diamagnetic
                      drift for the particle cross field transport. Instead of
                      testing the heuristic model in a sophisticated numerical
                      simulation including several physical mechanisms working
                      together, the purpose of this work is to point out basic
                      consequences for a drift-dominated cross field transport
                      using a reduced fluid model. To evaluate the model equations
                      and prepare them for subsequent numerical solution a
                      specific analytical model for 2D magnetic field
                      configurations with X-points is employed. In a first step
                      parameter scans in high-resolution grids for isothermal
                      plasmas are done to assess the basic formulas of the
                      heuristic model with respect to the functional dependence of
                      the scrape-off width on the poloidal magnetic field and
                      plasma temperature. Particular features in the 2D-fluid
                      calculations—especially the appearance of supersonic
                      parallel flows and shock wave like bifurcational jumps—are
                      discussed and can be understood partly in the framework of a
                      reduced 1D model. The resulting semi-analytical findings
                      might give hints for experimental proof and implementation
                      in more elaborated fluid simulations.},
      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:000405944200003},
      doi          = {10.1088/1741-4326/aa5ab7},
      url          = {https://juser.fz-juelich.de/record/827856},
}