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@ARTICLE{Togo:865448,
      author       = {Togo, Satoshi and Takizuka, Tomonori and Reiser, Dirk and
                      Sakamoto, Mizuki and Ezumi, Naomichi and Ogawa, Yuichi and
                      Nojiri, Kunpei and Ibano, Kenzo and Li, Yue and Nakashima,
                      Yousuke},
      title        = {{S}elf-consistent simulation of supersonic plasma flows in
                      advanced divertors},
      journal      = {Nuclear fusion},
      volume       = {59},
      number       = {7},
      issn         = {1741-4326},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2019-04899},
      pages        = {076041 -},
      year         = {2019},
      abstract     = {Advanced divertors gain larger plasma wetted area by
                      poloidal or total flux expansion. Qualitative
                      characteristics of supersonic plasma flows which are
                      generated by the magnetic nozzle effect are studied by using
                      a plasma fluid model incorporating anisotropic ion pressure
                      (AIP model). The AIP model can self-consistently simulate
                      supersonic plasma flows because, unlike the widely-used
                      plasma fluid model (the Braginskii equations), the equation
                      of parallel plasma momentum in it is described as a
                      hyperbolic-type and the plasma flow velocity is solved
                      without using explicit boundary conditions at the sheath
                      entrance in front of divertor plates. In comparisons of
                      plasma profiles between the AIP model and the Braginskii
                      equations, it is observed that the plasma flow velocity in
                      the Braginskii equations is forced to the sound speed at the
                      sheath entrance in conditions of decelerating supersonic
                      plasma flows leading to qualitative deviations with the AIP
                      model. In an application of the AIP model to a scrape-off
                      layer/divertor region incorporating super-X divertors with
                      various flux-expansion ratios, supersonic plasma flows in
                      divertor regions and highly anisotropic ion temperatures are
                      successfully simulated. It is also demonstrated that it
                      becomes easier with the AIP model to explain the mechanisms
                      of generations of supersonic plasma flows and
                      acceleration/deceleration of them (including stationary
                      shock waves) in flux-expanding divertors from the mirror
                      effect point of view.},
      cin          = {IEK-4},
      ddc          = {620},
      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:000471633500002},
      doi          = {10.1088/1741-4326/ab1f2c},
      url          = {https://juser.fz-juelich.de/record/865448},
}