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@ARTICLE{Nardon:827421,
      author       = {Nardon, E. and Fil, A. and Chauveau, P. and Tamain, P. and
                      Guirlet, R. and Koslowski, H. R. and Lehnen, M. and Reux,
                      C.},
      title        = {{O}n the mechanisms governing gas penetration into a
                      tokamak plasma during a massive gas injection},
      journal      = {Nuclear fusion},
      volume       = {57},
      number       = {1},
      issn         = {1741-4326},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2017-01549},
      pages        = {016027 -},
      year         = {2017},
      abstract     = {A new 1D radial fluid code, IMAGINE, is used to simulate
                      the penetration of gas into a tokamak plasma during a
                      massive gas injection (MGI). The main result is that the gas
                      is in general strongly braked as it reaches the plasma, due
                      to mechanisms related to charge exchange and (to a smaller
                      extent) recombination. As a result, only a fraction of the
                      gas penetrates into the plasma. Also, a shock wave is
                      created in the gas which propagates away from the plasma,
                      braking and compressing the incoming gas. Simulation results
                      are quantitatively consistent, at least in terms of orders
                      of magnitude, with experimental data for a D 2 MGI into a
                      JET Ohmic plasma. Simulations of MGI into the background
                      plasma surrounding a runaway electron beam show that if the
                      background electron density is too high, the gas may not
                      penetrate, suggesting a possible explanation for the recent
                      results of Reux et al in JET (2015 Nucl. Fusion 55 093013).},
      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:000388607000001},
      doi          = {10.1088/0029-5515/57/1/016027},
      url          = {https://juser.fz-juelich.de/record/827421},
}