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@ARTICLE{Gaja:825682,
      author       = {Gaja, Mustafa and Tokar, M. Z.},
      title        = {{I}nterplay of light and heavy impurities in a fusion
                      device},
      journal      = {Plasma physics and controlled fusion},
      volume       = {59},
      number       = {2},
      issn         = {1361-6587},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {FZJ-2017-00010},
      pages        = {025001 -},
      year         = {2017},
      abstract     = {Breathing' activity observed in the Large Helical Device
                      stellarator is characterized by macro-scale oscillations of
                      diverse plasma parameters such as the radiation losses from
                      heavy (iron) and light (carbon and oxygen) impurities,
                      electron density, temperature and the power absorbed in the
                      plasma from neutral beam. They provide an example of a
                      complex behavior in fusion plasmas triggered by the synergy
                      effects from impurities of different species. A
                      one-dimensional non-stationary model, describing the
                      transport across flux surfaces in the plasma of the main and
                      impurity neutral and charged particles, as well as of the
                      thermal energy with the heat absorption from the neutral
                      beam, radiation of high-Z ions from the plasma core and of
                      low-Z impurities from the edge, is elaborated. The model is
                      numerically realized, by applying the finite volume and
                      'progonga' methods to integrate the system of non-linearly
                      coupled transport equations. The results of simulations
                      presented reproduce qualitatively and essentially
                      quantitatively the observations. The model allows prediction
                      of the plasma and impurity environment conditions under
                      which one has to expect 'breathing' oscillations.},
      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:000390365300001},
      doi          = {10.1088/1361-6587/59/2/025001},
      url          = {https://juser.fz-juelich.de/record/825682},
}