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@ARTICLE{Liu:904061,
      author       = {Liu, S. C. and Liang, Yunfeng and Zhang, H. X. and Yan, N.
                      and Liao, L. and Zhang, X. X. and Liu, X. J. and Wei, W. Y.
                      and Zhao, N. and Chen, L. and Chen, R. and Hu, G. H. 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        = {{M}odelling and application of a new method to measure the
                      non-thermal electron current in the edge of magnetically
                      confined plasma},
      journal      = {Nuclear fusion},
      volume       = {61},
      number       = {12},
      issn         = {0029-5515},
      address      = {Vienna},
      publisher    = {IAEA},
      reportid     = {FZJ-2021-05631},
      pages        = {126004 -},
      year         = {2021},
      note         = {kein Zugriff auf Postprint},
      abstract     = {The non-thermal electrons could form considerable current
                      in the edge plasma of tokamak and stellarator. A new method,
                      named directional electron probe (DEP), is proposed to
                      measure the edge non-thermal electron current in
                      magnetically confined plasma. The DEP consists of two
                      opposite channels whose connection line aligns with the
                      local magnetic field line. Each channel has a hole with
                      small radial width and enough thickness to block high energy
                      ions due to their large Larmor radii, and at the end of the
                      hole the collector is biased to positive voltage to repel
                      low energy ions. In this way, the collected current of DEP
                      is mainly contributed by electrons. A particle orbit
                      simulation is performed based on the Boris algorithm, which
                      demonstrates the validity and rationality of the DEP.
                      According to the simulation, the ion collection probability
                      is quite small if compared with the electron collection
                      probability, consequently the collected current is mainly
                      contributed by electrons. The collected currents of thermal
                      electrons under Maxwell–Boltzmann distribution from both
                      channels are almost equal, and the net current is driven by
                      non-thermal electrons. A radial array of DEP has been
                      successfully applied to the scrape-off layer (SOL)
                      non-thermal electron current measurement in EAST. The
                      amplitude and structure of the non-thermal electron current
                      are observed during the lower hybrid wave heating phase. The
                      experimental SOL net current is compared with the simulated
                      net current from a rough estimation, revealing the same
                      radial structure of SOL current and demonstrating the
                      validity of DEP.},
      cin          = {IEK-4},
      ddc          = {620},
      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:000709985400001},
      doi          = {10.1088/1741-4326/ac2aba},
      url          = {https://juser.fz-juelich.de/record/904061},
}