Electronic Resource
[S.l.]
:
American Institute of Physics (AIP)
Physics of Plasmas
3 (1996), S. 2411-2422
ISSN:
1089-7674
Source:
AIP Digital Archive
Topics:
Physics
Notes:
In high temperature tokamak regimes, the m=1 reconnecting mode is governed by two fluid effects associated with the electron skin-depth de=c/ωpe and the ion sound radius ρs=cs/Ωci. To clarify the early nonlinear dynamics of this mode, numerical simulations of a two fluid model are presented. To simulate physically reasonable parameters in a tokamak geometry, an efficient approach is used in which only a narrow layer surrounding the q=1 surface and m=1 magnetic island must be simulated. In the usual tokamak case ρs(approximately-greater-than)de, as well as the limit ρs=0, the early nonlinear growth of the mode is faster than exponential due a broadening of the flow layer. This broadening appears to result from tension in the magnetic field lines, which acts to pull the layer open as the island grows. © 1996 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.871925
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