@article{8425,
  author = {B. Labit and T. Eich and G. Harrer and E. Wolfrum and M. Bernert and M. G. Dunne and L. Frassinetti and G. M. D. Hogeweij and A. Perek and B. Vanovac and P. Hennequin and R. Maurizio and A. Merle and EUROfusion MST1 Team and H. Meyer and S. Saarelma and H. Sheikh},
  title = {Dependence on plasma shape and plasma fueling for small edge-localized mode regimes in TCV and ASDEX Upgrade},
  abstract = {Within the EUROfusion MST1 work package, a series of experiments has been conducted on AUG and TCV devices to disentangle the role of plasma fueling and plasma shape for the onset of small ELM regimes. On both devices, small ELM regimes with high confinement are achieved if and only if two conditions are fulfilled at the same time. Firstly, the plasma density at the separatrix must be large enough (n e,sep / nG about 0.3), leading to a pressure profile flattening at the separatrix, which stabilizes type-I ELMs. Secondly, the magnetic configuration has to be close to a double null (DN), leading to a reduction of the magnetic shear in the extreme vicinity of the separatrix. As a consequence, its stabilizing effect on ballooning modes is weakened.
},
  year = {2019},
  journal = {Nuclear Fusion},
  volume = {59},
  pages = {086020},
  doi = {10.1088/1741-4326/ab2211},
  language = {eng},
}