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@ARTICLE{Abdullaev:190067,
      author       = {Abdullaev, S. S. and Finken, K. H. and Wongrach, K. and
                      Tokar, M. and Koslowski, H. R. and Willi, O. and Zeng, L.},
      title        = {{M}echanism of runaway electron beam formation during
                      plasma disruptions in tokamaks},
      journal      = {Physics of plasmas},
      volume       = {22},
      number       = {4},
      issn         = {1089-7674},
      address      = {[S.l.]},
      publisher    = {American Institute of Physics},
      reportid     = {FZJ-2015-03026},
      pages        = {040704},
      year         = {2015},
      abstract     = {A new physical mechanism of formation of runaway electron
                      beams during plasma disruptions in tokamaks is proposed. The
                      plasma disruption is caused by a strong stochastic magnetic
                      field formed due to nonlinearly excited low-mode number
                      magnetohydrodynamic (MHD) modes. It is conjectured that the
                      runaway electron beam is formed in the central plasma region
                      confined inside the intact magnetic surface located between
                      q = 1 and the closest low–order rational magnetic
                      surfaces [q = 5/4 or q = 4/3,…]. It results in
                      that runaway electron beam current has a helical nature with
                      a predominant m/n = 1/1 component. The thermal quench
                      and current quench times are estimated using the collisional
                      models for electron diffusion and ambipolar particle
                      transport in a stochastic magnetic field, respectively.
                      Possible mechanisms for the decay of the runaway electron
                      current owing to an outward drift electron orbits and
                      resonance interaction of high–energy electrons with the
                      m/n = 1/1 MHD mode are discussed.},
      cin          = {IEK-4},
      ddc          = {530},
      cid          = {I:(DE-Juel1)IEK-4-20101013},
      pnm          = {172 - Tokamak Physics (POF3-172)},
      pid          = {G:(DE-HGF)POF3-172},
      typ          = {PUB:(DE-HGF)16},
      UT           = {WOS:000353837200005},
      doi          = {10.1063/1.4919253},
      url          = {https://juser.fz-juelich.de/record/190067},
}