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@ARTICLE{Maddison:31306,
      author       = {Maddison, G. P. and Budny, I. L. and Dumortier, P. and
                      Jachmich, S. and Loarte, A. and Messiaen, A. M. and
                      Monier-Garbet, P. and Nave, N. I. and Ongena, J. and Rapp,
                      J. and Strachan, J. D.},
      title        = {{I}mproved {ELM} scaling with impurity seeding in {JET}},
      journal      = {Plasma physics and controlled fusion},
      volume       = {45},
      issn         = {0741-3335},
      address      = {Bristol},
      publisher    = {IOP Publ.},
      reportid     = {PreJuSER-31306},
      pages        = {1657 - 1669},
      year         = {2003},
      note         = {Record converted from VDB: 12.11.2012},
      abstract     = {Argon-seeded H-modes in low triangularity
                      pumped-limiter-like, and medium to high triangularity
                      divertor, configurations on JET are described, focusing upon
                      ELM effects. Appropriate fuelling and seeding strategies in
                      each geometry have combined good confinement with density
                      around the Greenwald level, accompanied by ELMS shown to
                      have explicitly Type I character. For lower triangularity,
                      argon injection leads to a reduction in normalized ELM
                      energy losses averaged over several fluctuations, relative
                      to unseeded scaling at comparable frequency and confinement
                      but lower density. This generalizes a similar result in
                      earlier studies [14, 15]. Optimized seeding tends always to
                      decrease ELM frequencies too, so that the average energy
                      efflux in ELMs is significantly diminished, down to only
                      approximate $to10\%$ of input power in the lowest example
                      included. At least for lower triangularity again, electron
                      pedestal temperature is cooled by argon, which tends also to
                      lower peak pedestal pressure before each consequently
                      smaller fluctuation. However, the pedestal density is
                      raised, and at higher radiation fractions this can restore
                      unseeded peak pedestal pressure and roughly ELM size, but
                      still at lower frequency. The underlying physics of Type I
                      instabilities defined by pedestal collisionality appears to
                      prevail in all cases both with and without seeding. High
                      performance H-modes with both reduced core transport and
                      moderated steady and transient power loads through added
                      impurities therefore seem to come closer to a fully
                      integrated scenario for Q = 10 operation in ITER.},
      keywords     = {J (WoSType)},
      cin          = {IPP},
      ddc          = {530},
      cid          = {I:(DE-Juel1)VDB181},
      pnm          = {Kernfusion und Plasmaforschung},
      pid          = {G:(DE-Juel1)FUEK250},
      shelfmark    = {Physics, Fluids $\&$ Plasmas / Physics, Nuclear},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000185689000009},
      doi          = {10.1088/0741-3335/45/9/307},
      url          = {https://juser.fz-juelich.de/record/31306},
}