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@ARTICLE{Sun:904077,
      author       = {Sun, Y. and Ma, Q. and Jia, M. and Gu, S. and Loarte, A.
                      and Liang, Yunfeng and Liu, Y. Q. and Paz-Soldan, C. A. and
                      Wu, X. M. and Xie, P. C. and Ye, C. and Wang, H. H. and
                      Zhao, J. Q. and Guo, W. and He, K. and Li, Y. Y. and Li, G.
                      and Liu, H. and Qian, J. and Sheng, H. and Shi, T. and Wang,
                      Y. M. and Weisberg, D. and Wan, B. and Zang, Q. and Zeng, L.
                      and Zhang, B. and Zhang, L. and Zhang, T. and Zhou, C. and
                      Contributors, EAST},
      title        = {{F}irst demonstration of full {ELM} suppression in low
                      input torque plasmas to support {ITER} research plan using n
                      = 4 {RMP} in {EAST}},
      journal      = {Nuclear fusion},
      volume       = {61},
      number       = {10},
      issn         = {0029-5515},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2021-05647},
      pages        = {106037 -},
      year         = {2021},
      note         = {kein Zugriff auf Postprint},
      abstract     = {Full suppression of type-I edge localized modes (ELMs)
                      using n = 4 resonant magnetic perturbations (RMPs) as
                      planned for ITER has been demonstrated for the first time (n
                      is the toroidal mode number of the applied RMP). This is
                      achieved in EAST plasmas with low input torque and tungsten
                      divertor, and the target plasma for these experiments in
                      EAST is chosen to be relevant to the ITER Q = 10 operational
                      scenario, thus also addressing significant scenario issues
                      for ITER. In these experiments the lowest neutral beam
                      injection (NBI) input torque is around TNBI ∼ 0.44 Nm,
                      which extrapolates to around 14 Nm in ITER (compared to a
                      total torque input of 35 Nm when 33 MW of NBI are used for
                      heating). The q95 is around 3.6 and normalized plasma beta
                      βN ∼ 1.5–1.8, similar to that in the ITER Q = 10
                      scenario. Suppression windows in both q95 and plasma density
                      are observed; in addition, lower plasma rotation is found to
                      be favourabe to access ELM suppression. ELM suppression is
                      maintained with line averaged density up to $60\%nGW$
                      (Greenwald density limit) by feedforward gas fuelling after
                      suppression is achieved. It is interesting to note that in
                      addition to an upper density, a low density threshold for
                      ELM suppression of $40\%nGW$ is also observed. In these
                      conditions energy confinement does not significantly drop
                      $(<10\%)$ during ELM suppression when compared to the ELMy
                      H-mode conditions, which is much better than previous
                      results using low n (n = 1 and 2) RMPs in higher q95
                      regimes. In addition, the core plasma tungsten concentration
                      is clearly reduced during ELM suppression demonstrating an
                      effective impurity exhaust. MHD response modelling using the
                      MARS-F code shows that edge magnetic field stochasticity has
                      a peak at q95 ∼ 3.65 for the odd parity configuration,
                      which is consistent to the observed suppression window
                      around 3.6–3.75. These results expand the physical
                      understanding of ELM suppression and demonstrate the
                      effectiveness of n = 4 RMPs for reliable control ELMs in
                      future ITER high Q plasma scenarios with minimum detrimental
                      effects on plasma confinement.},
      cin          = {IEK-4 / IEK-1},
      ddc          = {620},
      cid          = {I:(DE-Juel1)IEK-4-20101013 / I:(DE-Juel1)IEK-1-20101013},
      pnm          = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
      pid          = {G:(DE-HGF)POF4-134},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000706467800001},
      doi          = {10.1088/1741-4326/ac1a1d},
      url          = {https://juser.fz-juelich.de/record/904077},
}