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@ARTICLE{Liu:904060,
      author       = {Liu, S. C. and Liang, Yunfeng and Yan, N. and Liao, L. and
                      Wei, W. Y. and Meng, L. Y. and Chen, L. and Xu, S. and Zhao,
                      N. and Chen, R. and Hu, G. H. and Li, Y. L. and Liu, X. J.
                      and Ming, T. F. and Sun, Y. and Qian, J. P. and Zeng, L. and
                      Li, G. Q. and Wang, L. and Xu, G. S. and Gong, X. Z. and
                      Gao, X.},
      title        = {{A}pplication of a newly developed radial directional
                      electron probe to the edge unidirectional electron current
                      measurement in {EAST}},
      journal      = {Nuclear materials and energy},
      volume       = {29},
      issn         = {2352-1791},
      address      = {Amsterdam [u.a.]},
      publisher    = {Elsevier},
      reportid     = {FZJ-2021-05630},
      pages        = {101080 -},
      year         = {2021},
      abstract     = {A newly developed radial directional electron probe (DEP)
                      has been applied to the unidirectional electron current
                      measurement on EAST tokamak. The DEP consists of two radial
                      arrays of channels which have opposite directions and align
                      along the local magnetic field line. Each radial array has 6
                      holes with a radial interval of 5 mm. Every channel has a
                      hole with 0.5 mm radial width, 3 mm depth and 15° poloidal
                      opening angle. The graphite collector embedded inside the
                      hole is biased to positive potential to repel low energy
                      ions, and high energy ions are blocked by the hole surface
                      because their Larmor radii are larger than the radial width
                      of hole. In consequence, the ion current collected by the
                      DEP collector can be ignored in contrast with the electron
                      current, as demonstrated by the I-V characteristics in a DEP
                      commissioning experiment. The difference of collected
                      current between two opposite channels signifies the
                      unidirectional electron current in the flux tube. In a lower
                      hybrid wave (LHW) modulation experiment, the amplitude and
                      radial structure of unidirectional electron current induced
                      by LHW is measured directly by this radial DEP array, and
                      the LHW filament current covers over 20 mm radial region
                      with a maximum of 20 A/cm2.},
      cin          = {IEK-4},
      ddc          = {624},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {134 - Plasma-Wand-Wechselwirkung (POF4-134)},
      pid          = {G:(DE-HGF)POF4-134},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000711373000001},
      doi          = {10.1016/j.nme.2021.101080},
      url          = {https://juser.fz-juelich.de/record/904060},
}