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@ARTICLE{Telesca:904080,
      author       = {Telesca, G. and Ivanova-Stanik, I. and Perez von Thun, Ch.
                      and Aleiferis, S. and Brezinsek, S. and Chomiczewska, A. and
                      Huber, A. and Kowalska-Strzeciwilk, E. and Pawelec, E. and
                      Sertoli, M. and Zagórski, R. and Contributors, JET},
      title        = {{I}mpurity behaviour in {JET}-{ILW} plasmas fuelled with
                      gas and/or with pellets: a comparative study with the
                      transport code {COREDIV}},
      journal      = {Nuclear fusion},
      volume       = {61},
      number       = {6},
      issn         = {0029-5515},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2021-05650},
      pages        = {066027 -},
      year         = {2021},
      note         = {kein Zugriff auf Postprint},
      abstract     = {This study deals with the comparison of impurity behaviour
                      in pellet and gas fuelled JET-ITER like wall pulses with the
                      aim of finding the mechanisms leading to the generally
                      observed higher concentration of tungsten in pellet fuelled
                      plasmas. In fact, tungsten is the main high-Z impurity in
                      the JET-ILW plasmas and is responsible for most of the
                      radiative losses in the plasma core. Analysis of the
                      experimental data pertaining to pulses at different plasma
                      currents, different input power and different electron
                      densities is integrated by numerical modelling with the
                      self-consistent fluid transport code COREDIV.
                      Experimentally, and numerically, the ratio between the
                      radiated power in the divertor and the total one—which
                      results to be an increasing function of the ratio of the
                      electron density at the strike point to the volume average
                      one—is found to be a critical parameter determining
                      impurity accumulation. The higher this value the lower the
                      impurity density in the plasma core. Together with a little
                      higher core impurity residence time, the numerical modelling
                      indicates that the modest divertor screening for the pellet
                      fuelled pulses at low electron flow—characterized by low
                      electron density at the strike point and low perpendicular
                      transport in the SOL—leads to divertor impurity leakage
                      and higher impurity fluxes through the separatrix, in
                      agreement with theory.},
      cin          = {IEK-4},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
      pid          = {G:(DE-HGF)POF4-134},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000655566800001},
      doi          = {10.1088/1741-4326/abf74c},
      url          = {https://juser.fz-juelich.de/record/904080},
}