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@ARTICLE{Corre:836226,
      author       = {Corre, Y. and Bunting, P. and Coenen, J. W. and Gaspar, J.
                      and Iglesias, D. and Matthews, G. F. and Balboa, I. and
                      Coffey, I. and Dejarnac, R. and Firdaouss, M. and Gauthier,
                      E. and Jachmich, S. and Krieger, K. and Pitts, R. A. and
                      Rack, M. and Silburn, S. A.},
      title        = {{T}hermal analysis of protruding surfaces in the {JET}
                      divertor},
      journal      = {Nuclear fusion},
      volume       = {57},
      number       = {6},
      issn         = {1741-4326},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2017-05347},
      pages        = {066009 -},
      year         = {2017},
      abstract     = {Tungsten (W) melting is a major concern for next step
                      fusion devices. Two ELM induced tungsten melting experiments
                      have been performed in JET by introducing two special target
                      plate lamellae designed to receive excessively high ELM
                      transient power loads. The first experiment was performed in
                      JET in 2013 using a special lamella with a sharp leading
                      edge gradually varying from h  =  0.25 mm to
                      2.5 mm in order to maximise the temperature rise by
                      exposure to the full parallel heat flux. ELM-induced
                      transient melting has been successively achieved allowing
                      investigation of the melt motion. However, using the
                      available IR viewing geometry from the top, it was not
                      possible to directly discriminate between the top and
                      leading edge power loads. To improve the experimental
                      validation of heat load and melt motion modelling codes, a
                      new protruding W lamella with a 15° slope facing the
                      toroidal direction has been installed for the 2015–16
                      campaigns, allowing direct, spatially resolved observation
                      of the top surface and reduced sensitivity of the analysis
                      to the surface incidence angle of the magnetic field. This
                      paper reports on the results of these more recent
                      experiments, with specific focus on IR data analysis and
                      heat flux calculations during L-mode discharges in order to
                      investigate the behaviour of the W lamella with steady state
                      heat load, which is a prerequisite for the more complex
                      ELMing H-mode discharges (including both, steady and
                      transient heat loads). It shows that, at least in L-mode,
                      the assumption of optical heat flux projection is
                      justified.},
      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:000399433800001},
      doi          = {10.1088/1741-4326/aa687e},
      url          = {https://juser.fz-juelich.de/record/836226},
}